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MODEL T33903/T33904
17" & 20" FLOOR DRILL PRESS
w/LED LIGHT & LASER GUIDE
OWNER'S MANUAL
(For models manufactured since 07/23)
COPYRIGHT © SEPTEMBER, 2023 BY GRIZZLY INDUSTRIAL, INC., REVISED JANUARY, 2024 (CS)
WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE
OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.
#CS22755 PRINTED IN CHINA
***Keep for Future Reference***
V1.01.24
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This manual provides critical safety instructions on the proper setup,
operation, maintenance, and service of this machine/tool. Save this
document, refer to it often, and use it to instruct other operators.
Failure to read, understand and follow the instructions in this manual
may result in fire or serious personal injury—including amputation,
electrocution, or death.
The owner of this machine/tool is solely responsible for its safe use.
This responsibility includes but is not limited to proper installation in
a safe environment, personnel training and usage authorization,
proper inspection and maintenance, manual availability and comprehension, application of safety devices, cutting/sanding/grinding tool
integrity, and the usage of personal protective equipment.
The manufacturer will not be held liable for injury or property damage
from negligence, improper training, machine modifications or misuse.
Some dust created by power sanding, sawing, grinding, drilling, and
other construction activities contains chemicals known to the State
of California to cause cancer, birth defects or other reproductive
harm. Some examples of these chemicals are:
• Lead from lead-based paints.
• Crystalline silica from bricks, cement and other masonry products.
• Arsenic and chromium from chemically-treated lumber.
Your risk from these exposures varies, depending on how often you
do this type of work. To reduce your exposure to these chemicals:
Work in a well ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to filter
out microscopic particles.
Page 3
Table of Contents
INTRODUCTION ............................................... 2
Contact Info
Manual Accuracy
Identification
Controls & Components
Machine Data Sheet (T33903)
Machine Data Sheet (T33904)
SECTION 1: SAFETY
Safety Instructions for Machinery
Additional Safety for Drill Presses
SECTION 2: POWER SUPPLY
SECTION 3: SETUP
Needed for Setup
Unpacking
Inventory
Cleanup
Site Considerations
Anchoring to Floor
Assembly
Joining Drill Chuck & Arbor
Test Run
Spindle Break-In
................................................... 2
........................................... 2
................................................... 3
................................. 4
...................... 6
...................... 8
..................................... 10
................ 10
............... 12
...................... 13
....................................... 15
......................................... 15
.................................................... 15
...................................................... 16
........................................................ 17
...................................... 18
....................................... 19
..................................................... 19
.......................... 22
....................................................... 23
.......................................... 24
SECTION 5: ACCESSORIES
SECTION 6: MAINTENANCE
Schedule
Cleaning & Protecting
Lubrication
SECTION 7: SERVICE
Troubleshooting
Adjusting Return Spring Tension
Aligning Pulleys
Calibrating Depth Stop
Replacing Laser Modules & LED
Adjusting Quill Shaft Lock Screw
SECTION 8: WIRING
Wiring Safety Instructions
Wiring Diagram
Electrical Component Photos
SECTION 9: PARTS
T33903 Main
T33904 Main
Labels & Cosmetics
WARRANTY & RETURNS
...................................................... 36
.................................. 36
................................................... 36
................................... 38
........................................... 38
........................................... 42
................................. 43
...................................... 47
............................ 47
............................................ 48
....................................... 50
................................................ 50
................................................ 53
..................................... 56
.............................. 57
......................... 34
......................... 36
................. 41
................. 44
................. 46
...................... 49
SECTION 4: OPERATIONS
Operation Overview
Installing/Removing Arbor
Choosing Spindle Speed
Changing Spindle Speed
Installing/Removing Drill Bit
Adjusting Depth Stop
Positioning Table (T33903)
Positioning Table (T33904)
Adjusting Laser Guide
..................................... 25
................................... 30
................................. 33
............................ 25
............................ 26
............................. 28
............................. 29
......................... 30
......................... 31
......................... 32
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We stand behind our machines! If you have questions or need help, contact us with the information
below. Before contacting, make sure you get the
serial number
from the
machine ID label. This will help us help you faster.
We want your feedback on this manual. What did
you like about it? Where could it be improved?
Please take a few minutes to give us feedback.
Email: manuals@grizzly.com
We are proud to provide a high-quality owner’s
manual with your new machine!
We
instructions, specifications, drawings, and photographs
in this manual. Sometimes we make mistakes, but
our policy of continuous improvement also means
that
you receive is
slightly different than shown in the manual
If you find this to be the case, and the difference
between the manual and machine leaves you
confused or unsure about something
check our
website for an updated version. W
current
manuals and
on our web-
site at
Alternatively, you can call our Technical Support
for help. Before calling, make sure you write
down the
serial number
from the machine ID label (see below). This
information is required for us to provide proper
tech support, and it helps us determine if updated
documentation is available for your machine.
INTRODUCTION
Contact Info
and manufacture date
Grizzly Technical Support
1815 W. Battlefield
Springfield, MO 65807
Phone: (570) 546-9663
Email: techsupport@grizzly.com
Grizzly Documentation Manager
P.O. Box 2069
Bellingham, WA 98227-2069
Manual Accuracy
made every effort to be exact with the
sometimes the machine
.
,
e post
manual updates for free
www.grizzly.com.
manufacture date and
Manufacture Date
Serial Number
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Model T33903/T33904 (Mfd. Since 07/23)
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Identification
Become familiar with the names and locations of the controls and features shown below to better understand
the instructions in this manual.
Belt
Tension
Lever
Depth Stop
Belt Cover
Spindle
Return
Spring
LED &
Laser Guide
Table Height
Lock Handle
Column
Laser & LED
ON/OFF Switch
w/Disabling Key
Chuck Guard
Table
Switches
Chuck
Table Pivot
Lock Handle
(T33903)
Belt
Tension
Lock
(1 of 2)
Motor
Downfeed
Handle
(1 of 3)
Table Height
Crank
Base
For Your Own Safety Read Instruction Manual Before Operating Drill Press
a) Wear eye protection.
b) Do not wear gloves, necktie, or loose clothing.
c) Clamp workpiece or brace against column to prevent rotation.
d) Use recommended speed for drill accessory and workpiece material.
Model T33903/T33904 (Mfd. Since 07/23)
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Controls &
D. Spindle Pulley: Holds V-belt and transfers
motor power from idler pulley to spindle.
Components
Refer to the following figures and descriptions to
become familiar with the basic controls and components of this machine. Understanding these
items and how they work will help you understand
the rest of the manual and minimize your risk of
injury when operating this machine.
Power Controls
A
B
C
E. V-Belts: Control spindle speed.
F. Idler Pulley: Hold V-belts and transfers motor
power from motor pulley to spindle pulley.
G. Motor Pulley: Holds V-belt and transfers
motor power to idler pulley.
Headstock
H
L K
I
J
Figure 1. Power controls.
A. LED Switch: Turns LED ON or OFF.
B. ON/OFF Switch w/Disabling Key: Turns
motor ON when moved up; turns motor OFF
when moved down. Removal of yellow key
disables switch so motor cannot start.
C. Laser Switch: Turns laser guide ON or OFF.
Spindle Speed
ED
F
E
G
Figure 3. Right headstock components.
H. Chuck Key: Adjusts jaws on chuck for drill bit
changes.
I. Belt Tension Lock (1 of 2): Locks motor
position.
J. Downfeed Handle (1 of 3): Moves spindle
down when pulled down. Spindle automatically returns to top position when released.
K. Quill: Houses spindle and spindle bearings.
L. Chuck: Accepts drill bits with shanks from
1
⁄8"–5⁄8".
Figure 2. Spindle speed components.
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Model T33903/T33904 (Mfd. Since 07/23)
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Table
M
N
O
Figure 4. Left headstock components.
M. Belt Tension Lever: Adjusts motor position
to tension and release belts for changing
spindle speed, and for servicing.
N. Depth Stop: Stops spindle travel at prede-
termined drilling depth. Top of depth stop nut
indicates depth on scale.
O. Spindle Return Spring: Automatically
returns quill into headstock.
S
R
T
Figure 6. Table components (T33904 shown).
R. Table Height Crank: Adjusts table up and
down.
S. Tilt Scale: Displays current table tilt angle.
T. Table Height Lock Handle: Loosens to allow
adjustment of table position on column; tightens to lock table position.
LED & Laser Guide
P
P
Q
Figure 5. LED and laser guide.
P. LED: Illuminates work area.
Q. Laser Guide: Projects crosshairs on table to
align workpiece to drill bit.
U
Figure 7. Table pivot lock handle.
U. Table Pivot Lock Handle (T33903 Only):
Loosens to allow rotation of table; tightens to
lock table rotation.
Model T33903/T33904 (Mfd. Since 07/23)
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Machine Data Sheet (T33903)
MACHINE DATA
SHEET
Customer Service #: (570) 546-9663 · To Order Call: (800) 523-4777 · Fax #: (800) 438-5901
MODEL T33903 17" FLOOR DRILL PRESS WITH LED LIGHT
& LASER GUIDE
Product Dimensions:
Weight.............................................................................................................................................................. 223 lbs.
Width (side-to-side) x Depth (front-to-back) x Height........................................................................... 17 x 31 x 68 in.
Footprint (Length x Width)..................................................................................................................... 22-1/2 x 17 in.
Shipping Dimensions:
Type..................................................................................................................................................... Cardboard Box
Content........................................................................................................................................................... Machine
Weight.............................................................................................................................................................. 245 lbs.
Length x Width x Height....................................................................................................................... 57 x 26 x 14 in.
Must Ship Upright................................................................................................................................................... Yes
Electrical:
Power Requirement.......................................................................................................... 120V, Single Phase, 60 Hz
Full-Load Current Rating........................................................................................................................................ 13A
Minimum Circuit Size.............................................................................................................................................. 15A
Connection Type....................................................................................................................................... Cord & Plug
Power Cord Included.............................................................................................................................................. Yes
Power Cord Length.............................................................................................................................................. 70 in.
Power Cord Gauge......................................................................................................................................... 16 AWG
Plug Included.......................................................................................................................................................... Yes
Included Plug Type................................................................................................................................................ 5-15
Switch Type...................................................................................................... Paddle Safety Switch w/Disabling Key
Motors:
Main
Horsepower.......................................................................................................................................... 1-1/4 HP
Phase............................................................................................................................................ Single-Phase
Amps............................................................................................................................................................ 13A
Speed................................................................................................................................................ 1700 RPM
Type................................................................................................................. TEFC Capacitor-Start Induction
Power Transfer ............................................................................................................................................ Belt
Bearings..................................................................................................... Shielded & Permanently Lubricated
Centrifugal Switch/Contacts Type......................................................................................................... External
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Model T33903/T33904 (Mfd. Since 07/23)
Page 9
Main Specifications:
Operation Information
Type........................................................................................................................................................... Floor
Swing......................................................................................................................................................... 17 in.
Spindle Taper............................................................................................................................................ MT#4
Spindle Travel........................................................................................................................................ 4-3/4 in.
Max. Distance From Spindle to Column................................................................................................ 8-1/2 in.
Max. Distance From Spindle to Table........................................................................................................ 27 in.
Number of Spindle Speeds............................................................................................................................. 12
Range of Spindle Speeds......................................................................................................... 210 - 3020 RPM
Drilling Capacity (Mild Steel)........................................................................................................................ 1 in.
Drilling Capacity (Cast Iron)................................................................................................................... 1-1/4 in.
Drill Chuck Type......................................................................................................................... JT3 Key Chuck
Drill Chuck Size................................................................................................................................ 1/8 - 5/8 in.
Spindle Information
Distance From Spindle to Base................................................................................................................. 48 in.
Quill Diameter....................................................................................................................................... 2.043 in.
Table Information
Max. Table Tilt (Left/Right)................................................................................................................ 0 - 45 deg.
Table Swing.......................................................................................................................................... 360 deg.
Table Swivel Around Center................................................................................................................. 360 deg.
Table Swivel Around Column............................................................................................................... 360 deg.
Max. Movement of Work Table............................................................................................................ 22-1/4 in.
Table Length........................................................................................................................................ 14-1/8 in.
Table Width......................................................................................................................................... 14-1/8 in.
Table Thickness.................................................................................................................................... 2-1/8 in.
Vertical Table Travel..................................................................................................................... Crank Handle
Number of T-Slots............................................................................................................................................ 4
T-Slot Size................................................................................................................................................ 5/8 in.
Floor-To-Table Height............................................................................................................ 24-1/2 - 46-3/4 in.
Construction
Table....................................................................................................................... Precision-Ground Cast Iron
Column....................................................................................................................................................... Steel
Spindle Housing................................................................................................................................... Cast Iron
Head.................................................................................................................................................... Cast Iron
Base..................................................................................................................................................... Cast Iron
Paint Type/Finish...................................................................................................................... Powder Coated
Other Related Information
Base Length........................................................................................................................................ 22-1/2 in.
Base Width.......................................................................................................................................... 16-5/8 in.
Column Diameter................................................................................................................................... 3-5/8 in.
Quill Flange/Collar Diameter........................................................................................................................ 3 in.
Quill Hold Type...................................................................................................................... Slotted Set Screw
Depth Stop Type................................................................................................ Threaded Rod w/Positive Stop
Has Work Light............................................................................................................................................. Yes
Light Socket Type................................................................................................................................ LED 12V
Maximum Bulb Wattage................................................................................................................................ 3W
Has Laser Guide.......................................................................................................................................... Yes
Laser Classification................................................................................................................................ Class II
Laser Wavelength................................................................................................................................... 650 nm
Laser Maximum Output.............................................................................................................................. 1mW
Model T33903/T33904 (Mfd. Since 07/23)
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Machine Data Sheet (T33904)
MACHINE DATA
SHEET
Customer Service #: (570) 546-9663 · To Order Call: (800) 523-4777 · Fax #: (800) 438-5901
MODEL T33904 20" FLOOR DRILL PRESS WITH LED LIGHT
& LASER GUIDE
Product Dimensions:
Weight.............................................................................................................................................................. 235 lbs.
Width (side-to-side) x Depth (front-to-back) x Height............................................................... 18-1/2 x 33 x 67-1/2 in.
Footprint (Length x Width)............................................................................................................... 22-1/2 x 16-1/2 in.
Shipping Dimensions:
Type............................................................................................................................................................. Cardboard
Content........................................................................................................................................................... Machine
Weight.............................................................................................................................................................. 257 lbs.
Length x Width x Height....................................................................................................................... 57 x 26 x 14 in.
Must Ship Upright................................................................................................................................................... Yes
Electrical:
Power Requirement........................................................................................................... 120V, Single-Phase, 60 Hz
Full-Load Current Rating........................................................................................................................................ 13A
Minimum Circuit Size.............................................................................................................................................. 15A
Connection Type....................................................................................................................................... Cord & Plug
Power Cord Included.............................................................................................................................................. Yes
Power Cord Length.............................................................................................................................................. 70 in.
Power Cord Gauge......................................................................................................................................... 16 AWG
Plug Included.......................................................................................................................................................... Yes
Included Plug Type................................................................................................................................................ 5-15
Switch Type...................................................................................................... Paddle Safety Switch w/Disabling Key
Motors:
Main
Horsepower.......................................................................................................................................... 1-1/4 HP
Phase............................................................................................................................................ Single-Phase
Amps............................................................................................................................................................ 13A
Speed................................................................................................................................................ 1720 RPM
Type................................................................................................................. TEFC Capacitor-Start Induction
Power Transfer ......................................................................................................................................... Direct
Bearings..................................................................................................... Shielded & Permanently Lubricated
Centrifugal Switch/Contacts Type......................................................................................................... External
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Model T33903/T33904 (Mfd. Since 07/23)
Page 11
Main Specifications:
Operation Information
Type........................................................................................................................................................... Floor
Swing......................................................................................................................................................... 20 in.
Spindle Taper............................................................................................................................................ MT#4
Spindle Travel........................................................................................................................................ 4-1/2 in.
Max. Distance From Spindle to Column.................................................................................................... 10 in.
Max. Distance From Spindle to Table................................................................................................. 28-5/8 in.
Number of Spindle Speeds............................................................................................................................. 12
Range of Spindle Speeds......................................................................................................... 210 - 3020 RPM
Drilling Capacity (Mild Steel)........................................................................................................................ 1 in.
Drilling Capacity (Cast Iron)................................................................................................................... 1-1/4 in.
Drill Chuck Type......................................................................................................................... JT3 Key Chuck
Drill Chuck Size................................................................................................................................ 1/8 - 5/8 in.
Spindle Information
Distance From Spindle to Base........................................................................................................... 47-1/8 in.
Quill Diameter....................................................................................................................................... 2.441 in.
Table Information
Max. Table Tilt (Left/Right)................................................................................................................ 0 - 45 deg.
Table Swing.......................................................................................................................................... 360 deg.
Table Swivel Around Column............................................................................................................... 360 deg.
Max. Movement of Work Table............................................................................................................ 22-3/8 in.
Table Length...................................................................................................................................... 16-5/16 in.
Table Width......................................................................................................................................... 18-1/2 in.
Table Thickness.................................................................................................................................... 1-1/2 in.
Vertical Table Travel..................................................................................................................... Crank Handle
Number of T-Slots............................................................................................................................................ 2
T-Slot Size.............................................................................................................................................. 9/16 in.
T-Slot Centers....................................................................................................................................... 7-1/8 in.
Floor-To-Table Height............................................................................................................ 22-1/8 - 44-1/2 in.
Construction
Table....................................................................................................................... Precision-Ground Cast Iron
Column....................................................................................................................................................... Steel
Spindle Housing................................................................................................................................... Cast Iron
Head.................................................................................................................................................... Cast Iron
Base..................................................................................................................................................... Cast Iron
Paint Type/Finish....................................................................................................................... Powder Coated
Other Related Information
Base Length........................................................................................................................................ 22-1/2 in.
Base Width.......................................................................................................................................... 16-1/2 in.
Column Diameter................................................................................................................................... 3-5/8 in.
Quill Flange/Collar Diameter........................................................................................................................ 3 in.
Quill Hold Type...................................................................................................................... Slotted Set Screw
Depth Stop Type................................................................................................ Threaded Rod w/Positive Stop
Has Work Light............................................................................................................................................. Yes
Light Socket Type................................................................................................................................ LED 12V
Maximum Bulb Wattage................................................................................................................................ 3W
Has Laser Guide.......................................................................................................................................... Yes
Laser Classification................................................................................................................................ Class II
Laser Wavelength................................................................................................................................... 650 nm
Laser Maximum Output.............................................................................................................................. 1mW
Model T33903/T33904 (Mfd. Since 07/23)
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Page 12
SECTION 1: SAFETY
For Your Own Safety, Read Instruction
Manual Before Operating This Machine
The purpose of safety symbols is to attract your attention to possible hazardous conditions.
This manual uses a series of symbols and signal words intended to convey the level of importance of the safety messages. The progression of symbols is described below. Remember that
safety messages by themselves do not eliminate danger and are not a substitute for proper
accident prevention measures. Always use common sense and good judgment.
Indicates an imminently hazardous situation which, if not avoided,
WILL result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided,
COULD result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided,
MAY result in minor or moderate injury. It may also be used to alert
against unsafe practices.
Alerts the user to useful information about proper operation of the
NOTICE
machine to avoid machine damage.
Safety Instructions for Machinery
OWNER’S MANUAL. Read and understand this
owner’smanualBEFOREusingmachine.
TRAINED OPERATORS ONLY. Untrained operators have a higher risk of being hurt or killed.
Only allow trained/supervised people to use this
machine. When machine is not being used, disconnect power, remove switch keys, or lock-out
machine to prevent unauthorized use—especially
around children. Make your workshop kid proof!
DANGEROUS ENVIRONMENTS. Do not use
machinery in areas that are wet, cluttered, or have
poor lighting. Operating machinery in these areas
greatly increases the risk of accidents and injury.
MENTAL ALERTNESS REQUIRED. Full mental
alertness is required for safe operation of machinery. Never operate under the influence of drugs or
alcohol, when tired, or when distracted.
ELECTRICAL EQUIPMENT INJURY RISKS.
You can be shocked, burned, or killed by touching
live electrical components or improperly grounded
machinery. To reduce this risk, only allow qualified
service personnel to do electrical installation or
repair work, and always disconnect power before
accessing or exposing electrical equipment.
DISCONNECT POWER FIRST.
nect machine from power supply BEFORE making adjustments, changing tooling, or servicing
machine. This prevents an injury risk from unintended startup or contact with live electrical components.
EYE PROTECTION. Always wear ANSI-approved
safety glasses or a face shield when operating
or observing machinery to reduce the risk of eye
injury or blindness from flying particles. Everyday
eyeglasses are NOT approved safety glasses.
Always discon-
-10-
Model T33903/T33904 (Mfd. Since 07/23)
Page 13
may damage the wires inside. Do not handle
WEARING PROPER APPAREL. Do not wear
loose clothing, gloves, neckties, or jewelry that
can become entangled in moving parts. Always tie
back or cover long hair. Wear non-slip footwear to
reduce risk of slipping and losing control or accidentally contacting cutting tool or moving parts.
HAZARDOUS DUST. Dust created by machinery
operations may cause cancer, birth defects, or
long-term respiratory damage. Be aware of dust
hazards associated with each workpiece material. Always wear a NIOSH-approved respirator to
reduce your risk.
HEARING PROTECTION. Always wear hearing protection when operating or observing loud
machinery. Extended exposure to this noise without hearing protection can cause permanent
hearing loss.
REMOVE ADJUSTING TOOLS. Tools left on
machinery can become dangerous projectiles
upon startup. Never leave chuck keys, wrenches,
or any other tools on machine. Always verify
removal before starting!
USE CORRECT TOOL FOR THE JOB. Only use
this tool for its intended purpose—do not force
it or an attachment to do a job for which it was
not designed. Never make unapproved modifications—modifying tool or using it differently than
intended may result in malfunction or mechanical
failure that can lead to personal injury or death!
AWKWARD POSITIONS. Keep proper footing
and balance at all times when operating machine.
Do not overreach! Avoid awkward hand positions
that make workpiece control difficult or increase
the risk of accidental injury.
CHILDREN & BYSTANDERS. Keep children and
bystanders at a safe distance from the work area.
Stop using machine if they become a distraction.
GUARDS & COVERS. Guards and covers reduce
accidental contact with moving parts or flying
debris. Make sure they are properly installed,
undamaged, and working correctly BEFORE
operating machine.
FORCING MACHINERY. Do not force machine.
It will do the job safer and better at the rate for
which it was designed.
NEVER STAND ON MACHINE. Serious injury
may occur if machine is tipped or if the cutting
tool is unintentionally contacted.
STABLE MACHINE. Unexpected movement during operation greatly increases risk of injury or
loss of control. Before starting, verify machine is
stable and mobile base (if used) is locked.
USE RECOMMENDED ACCESSORIES. Consult
thisowner’smanualorthemanufacturerforrec-
ommended accessories. Using improper accessories will increase the risk of serious injury.
UNATTENDED OPERATION. To reduce the
risk of accidental injury, turn machine OFF and
ensure all moving parts completely stop before
walking away. Never leave machine running
while unattended.
MAINTAIN WITH CARE. Follow all maintenance
instructions and lubrication schedules to keep
machine in good working condition. A machine
that is improperly maintained could malfunction,
leading to serious personal injury or death.
DAMAGED PARTS. Regularly inspect machine
for damaged, loose, or mis-adjusted parts—or
any condition that could affect safe operation.
Immediately repair/replace BEFORE operating
machine. For your own safety, DO NOT operate
machine with damaged parts!
MAINTAIN POWER CORDS. When disconnecting cord-connected machines from power, grab
and pull the plug—NOT the cord. Pulling the cord
cord/plug with wet hands. Avoid cord damage by
keeping it away from heated surfaces, high traffic
areas, harsh chemicals, and wet/damp locations.
EXPERIENCING DIFFICULTIES. If at any time
you experience difficulties performing the intended operation, stop using the machine! Contact our
Technical Support at (570) 546-9663.
Model T33903/T33904 (Mfd. Since 07/23)
-11-
Page 14
Additional Safety for Drill Presses
To avoid loss of
drilling control or bit breakage, only drill into a flat
surface that is approximately perpendicular to
tool/bit, tighten all table and headstock locks
Serious injury or death can occur from getting clothing, jewelry, or long hair entangled in
rotating spindle or bit/cutting tool. Contact with rotating bit/cutting tool can result in severe cuts
or amputation of fingers. Flying metal chips can cause blindness or eye injuries. Broken bits/
cutting tools, unsecured workpieces, chuck keys, or other adjustment tools thrown from rotating
spindle can strike nearby operator or bystanders with deadly force. To reduce the risk of these
hazards, operator and bystanders MUST completely heed hazards and warnings below.
EYE/FACE/HAND PROTECTION. Flying chips
created by drilling can cause eye injuries or blindness. Always wear a face shield in addition to
safety glasses. Always keep hands and fingers
away from drill bit/cutting tool. Avoid awkward
hand positions, where a sudden slip could cause
hand to move into bit/cutting tool.
AVOIDING ENTANGLEMENT. DO NOT wear
loose clothing, gloves, or jewelry. Tie back long
hair. Keep all guards in place and secure. Always
allow spindle to stop on its own. DO NOT stop
spindle using your hand or any other object.
REMOVING ADJUSTMENT TOOLS. Chuck key,
wrenches, and other tools left on machine can
become deadly projectiles when spindle is started.
Remove all loose items or tools used on spindle
immediately after use.
CORRECT SPINDLE SPEED. Using wrong spindle speed can cause bits/cutting tools to break
and strike operator or bystanders. Follow recommended speeds and feeds for each size/type of
bit/cutting tool and workpiece material.
SECURING BIT/CUTTING TOOL. Firmly secure
bit/cutting tool in chuck so it cannot fly out of
spindle during operation or startup.
DRILLING PREPARATION.
bit. Clear table of all objects before starting spindle. Never start spindle with bit pressed against
workpiece.
SECURING TABLE AND HEADSTOCK. To avoid
loss of control leading to accidental contact with
before operating drill press.
WORKPIECE CONTROL. An unsecured workpiece may unexpectedly shift, spin out of control, or be thrown if bit/cutting tool “grabs” during
operation. Clamp workpiece to table or in tablemounted vise, or brace against column to prevent
rotation. NEVER hold workpiece by hand during
operation. NEVER start machine with bit/cutting
tool touching workpiece; allow spindle to gain full
speed before drilling.
INSPECTING BIT/CUTTING TOOL. Damaged
bits/cutting tools may break apart during operation
and hit operator or bystanders. Dull bits/cutting
tools increase cutting resistance and are more
likely to grab and spin/throw workpiece. Always
inspect bits/cutting tools for sharpness, chips, or
cracks before each use. Replace dull, chipped, or
cracked bits/cutting tools immediately.
Like all machinery there is potential danger
when operating this machine. Accidents
are frequently caused by lack of familiarity
or failure to pay attention. Use this machine
with respect and caution to decrease the
risk of operator injury. If normal safety precautions are overlooked or ignored, serious personal injury may occur.
-12-
No list of safety guidelines can be complete. Every shop environment is different.
Always consider safety first, as it applies
to your individual working conditions. Use
this and other machinery with caution and
respect. Failure to do so could result in
serious personal injury, damage to equipment, or poor work results.
Model T33903/T33904 (Mfd. Since 07/23)
Page 15
SECTION 2: POWER SUPPLY
Before installing the machine, consider the availability and proximity of the required power supply
circuit. If an existing circuit does not meet the
requirements for this machine, a new circuit must
be installed. To minimize the risk of electrocution,
fire, or equipment damage, installation work and
electrical wiring must be done by an electrician or
qualified service personnel in accordance with all
applicable codes and standards.
or equipment damage
may occur if machine is
not properly grounded
and connected to power
The full-load current rating is the amperage a
machine draws at 100% of the rated output power.
On machines with multiple motors, this is the
amperage drawn by the largest motor or sum of all
motors and electrical devices that might operate
at one time during normal operations.
The full-load current is not the maximum amount
of amps that the machine will draw. If the machine
is overloaded, it will draw additional amps beyond
the full-load rating.
If the machine is overloaded for a sufficient length
of time, damage, overheating, or fire may result—
especially if connected to an undersized circuit.
To reduce the risk of these hazards, avoid overloading the machine during operation and make
sure it is connected to a power supply circuit that
meets the specified circuit requirements.
For your own safety and protection of
Note: Circuit requirements in this manual apply to
a dedicated circuit—where only one machine will
be running on the circuit at a time. If machine will
be connected to a shared circuit where multiple
machines may be running at the same time, consult an electrician or qualified service personnel to
ensure circuit is properly sized for safe operation.
A power supply circuit includes all electrical
equipment between the breaker box or fuse panel
in the building and the machine. The power supply circuit used for this machine must be sized to
safely handle the full-load current drawn from the
machine for an extended period of time. (If this
machine is connected to a circuit protected by
fuses, use a time delay fuse marked D.)
This machine is prewired to operate on a power
supply circuit that has a verified ground and meets
the following requirements:
Availability
Electrocution, fire, shock,
Serious injury could occur if you connect
machine to power before completing setup
process. DO NOT connect to power until
instructed later in this manual.
120V Circuit Requirements
Nominal Voltage .................... 110V, 115V, 120V
..........................................................60 Hz
Cycle
Phase
Power Supply Circuit
Plug/Receptacle
........................................... Single-Phase
......................... 15 Amps
............................. NEMA 5-15
supply.
Full-Load Current Rating
Full-Load Current Rating at 120V ..... 13 Amps
Model T33903/T33904 (Mfd. Since 07/23)
property, consult an electrician if you are
unsure about wiring practices or electrical
codes in your area.
-13-
Page 16
Improper connection of the equipment-grounding
wire can result in a risk of electric shock. The
wire with green insulation (with or without yellow
stripes) is the equipment-grounding wire. If repair
or replacement of the power cord or plug is necessary, do not connect the equipment-grounding
wire to a live (current carrying) terminal.
Check with a qualified electrician or service personnel if you do not understand these grounding
requirements, or if you are in doubt about whether
the tool is properly grounded. If you ever notice
that a cord or plug is damaged or worn, disconnect it from power, and immediately replace it with
We do not recommend using an extension cord
with this machine. If you must use an extension
cord, only use it if absolutely necessary and only
on a temporary basis.
Extension cords cause voltage drop, which can
damage electrical components and shorten motor
life. Voltage drop increases as the extension cord
size gets longer and the gauge size gets smaller
(higher gauge numbers indicate smaller sizes).
Any extension cord used with this machine must
be in good condition and contain a ground wire
and matching plug/receptacle. Additionally, it must
meet the following size requirements:
Grounding & Plug Requirements
Two-prong outlets do not meet the
grounding requirements for this machine.
provided—if it will not fit the outlet, have a
This machine MUST be grounded. In the event
of certain malfunctions or breakdowns, grounding
reduces the risk of electric shock by providing a
path of least resistance for electric current.
This machine is equipped with a power cord that
has an equipment-grounding wire and a grounding
plug. Only insert plug into a matching receptacle
(outlet) that is properly installed and grounded in
accordance with all local codes and ordinances.
DO NOT modify the provided plug!
GROUNDED
5-15 RECEPTACLE
Grounding Pin
5-15 PLUG
Extension Cords
Neutral Hot
Figure 8. Typical 5-15 plug and receptacle.
SHOCK HAZARD!
Do not modify or use an adapter on the plug
qualified electrician install the proper outlet
with a verified ground.
-14-
Minimum Gauge Size ........................... 12 AWG
Maximum Length (Shorter is Better)
Model T33903/T33904 (Mfd. Since 07/23)
.......50 ft.
Page 17
SECTION 3: SETUP
The following items are needed, but not included,
for the setup/assembly of this machine.
This machine was carefully packaged for safe
transport. When unpacking, separate all enclosed
items from packaging materials and inspect them
for shipping damage.
,
please
IMPORTANT: Save all packaging materials until
you are completely satisfied with the machine and
have resolved any issues between Grizzly or the
shipping agent. You MUST have the original pack-
aging to file a freight claim. It is also extremely
helpful if you need to return your machine later.
Needed for Setup
This machine presents
serious injury hazards
to untrained users. Read
through this entire manual to become familiar with
the controls and operations before starting the
machine!
Wear safety glasses during
the entire setup process!
HEAVY LIF T!
Straining or crushing injury
may occur from improperly
lifting machine or some of
its parts. To reduce this risk,
get help from other people
and use a forklift (or other
lifting equipment) rated for
weight of this machine.
Description Qty
• Safety Glasses (for each person) .......... 1 Pr.
• Cleaner/Degreaser ..................... As Needed
• Acetone/Lacquer Thinner ........... As Needed
• Disposable Rags ........................ As Needed
• Disposable Gloves ..................... As Needed
• Lifting Equipment
(Rated for at least 325 lbs.) ........................ 1
• Another Person .......................................... 1
• Wrench or Socket 17mm ............................ 1
• Open-End Wrench 7mm ............................. 1
• Phillips Head Screwdriver #2 ..................... 1
• Plumb Bob .................................................. 1
• Ruler or Measuring Tape ............................ 1
• Marker ........................................................ 1
• Block of Wood ............................................ 1
• Mounting Hardware .................... As Needed
Unpacking
Model T33903/T33904 (Mfd. Since 07/23)
If items are damaged
call us immediately at (570) 546-9663.
-15-
Page 18
Inventory
The following is a list of items shipped with your
machine. Before beginning setup, lay these items
out and inventory them.
If any non-proprietary parts are missing (e.g. a
nut or a washer), we will gladly replace them; or
for the sake of expediency, replacements can be
obtained at your local hardware store.
A
B
C
NOTICE
If you cannot find an item on this list, carefully check around/inside the machine and
packaging materials. Often, these items get
lost in packaging materials while unpacking or they are pre-installed at the factory.
Box 1 (Figure 9) Qty
A. Headstock .................................................. 1
B. Column Assembly ...................................... 1
C. Table Support Bracket (T33903 Only) ....... 1
D. Table (T33903 Only) .................................. 1
E. Table Assembly (T33904 Only) .................. 1
F. Table Height Crank ..................................... 1
G. Downfeed Handles ..................................... 3
H. Base ........................................................... 1
I. Arbor MT#4 x JT3 ....................................... 1
J. Drill Chuck JT3 1⁄8"–5⁄8" .............................. 1
K. Chuck Guard .............................................. 1
L. Drift Key ...................................................... 1
M. Drill Chuck Key ........................................... 1
N. Combo Wrench 30mm ............................... 1
O. Hex Wrenches 3, 4, 5mm ..................... 1 Ea.
P. Hex Bolts M10-1.5 x 30 .............................. 4
D
E
F
H
I
L M
G
J
K
N
-16-
O
Figure 9. Inventory.
Model T33903/T33904 (Mfd. Since 07/23)
P
Page 19
Cleanup
parts of the
The unpainted surfaces of your machine are
coated with a heavy-duty rust preventative that
prevents corrosion during shipment and storage.
This rust preventative works extremely well, but it
will take a little time to clean.
Be patient and do a thorough job cleaning your
machine. The time you spend doing this now will
give you a better appreciation for the proper care
of your machine's unpainted surfaces.
There are many ways to remove this rust preventative, but the following steps work well in a wide
variety of situations. Always follow the manufac-
turer’sinstructionswithanycleaningproductyou
use and make sure you work in a well-ventilated
area to minimize exposure to toxic fumes.
Before cleaning, gather the following:
• Disposable rags
• Cleaner/degreaser (WD•40 works well)
• Safety glasses & disposable gloves
• Plastic paint scraper (optional)
Basic steps for removing rust preventative:
1.
2.
3.
4.
Many cleaning solvents
work in a well-ventilated
Cleanup
Gasoline and petroleum
products have low flash
points and can explode
or cause fire if used to
clean machinery. Av oi d
using these products
to clean machinery.
Put on safety glasses.
Coat the rust preventative with a liberal
amount of cleaner/degreaser, then let it soak
for 5–10 minutes.
Wipe off the surfaces. If your cleaner/degreas-
er is effective, the rust preventative will wipe
off easily. If you have a plastic paint scraper,
scrape off as much as you can first, then wipe
off the rest with the rag.
are toxic if inhaled. Only
area.
NOTICE
Avoid harsh solvents like acetone or brake
parts cleaner that may damage painted surfaces. Always test on a small, inconspicuous location first.
T23692—Orange Power Degreaser
A great product for removing the waxy shipping grease from the non-painted
machine during clean up.
Order online at
www.grizzly.com
OR
Call 1-800-523-4777
Repeat Steps 2–3 as necessary until clean,
then coat all unpainted surfaces with a quality
metal protectant to prevent rust.
Model T33903/T33904 (Mfd. Since 07/23)
Figure 10. T23692 Orange Power Degreaser.
-17-
Page 20
Site Considerations
Weight Load
Refer to the
of your machine. Make sure that the surface upon
which the machine is placed will bear the weight
of the machine, additional equipment that may be
installed on the machine, and the heaviest workpiece that will be used. Additionally, consider the
weight of the operator and any dynamic loading
that may occur when operating the machine.
Space Allocation
Consider the largest size of workpiece that will
be processed through this machine and provide
enough space around the machine for adequate
operator material handling or the installation of
auxiliary equipment. With permanent installations,
leave enough space around the machine to open
or remove doors/covers as required by the maintenance and service described in this manual.
See below for required space allocation.
Physical Environment
The physical environment where the machine is
operated is important for safe operation and longevity of machine components. For best results,
operate this machine in a dry environment that is
free from excessive moisture, hazardous chemicals, airborne abrasives, or extreme conditions.
Extreme conditions for this type of machinery are
generally those where the ambient temperature
range exceeds 41°–104°F; the relative humidity
range exceeds 20%–95% (non-condensing); or
the environment is subject to vibration, shocks,
Place this machine near an existing power source.
Make sure all power cords are protected from
traffic, material handling, moisture, chemicals, or
other hazards. Make sure to leave enough space
around machine to disconnect power supply or
Lighting around the machine must be adequate
enough that operations can be performed safely.
Shadows, glare, or strobe effects that may distract
or impede the operator must be eliminated.
Machine Data Sheet for the weight
or bumps.
Electrical Installation
Children or untrained people
may be seriously injured by
this machine. Only install in an
access restricted location.
17"
T33903
31"
apply a lockout/tagout device, if required.
Lighting
Electrical
=
Connection
33"
Min. 30"
18½"
T33904
-18-
Wall
Figure 11. Minimum working clearances.
Model T33903/T33904 (Mfd. Since 07/23)
Page 21
Anchoring to Floor
Anchoring machinery to the floor prevents tipping
or shifting and reduces vibration that may occur
during operation, resulting in a machine that runs
slightly quieter and feels more solid.
If the machine will be installed in a commercial or
workplace setting, or if it is permanently connected (hardwired) to the power supply, local codes
may require that it be anchored to the floor.
If not required by any local codes, fastening the
machine to the floor is an optional step. If you
choose not to do this with your machine, we recommend placing it on machine mounts, as these
provide an easy method for leveling and they have
vibration-absorbing pads.
Lag shield anchors with lag screws (see below)
are a popular way to anchor machinery to a concrete floor, because the anchors sit flush with the
floor surface, making it easy to unbolt and move
the machine later, if needed. However, anytime
local codes apply, you MUST follow the anchoring
methodology specified by the code.
The machine must be fully assembled before it
can be operated. Before beginning the assembly
process, refer to
and gather
all
To ensure the assembly process
goes smoothly, first clean any
covered or coated in heavy-duty rust preventative (if
applicable).
Number of Mounting Holes ............................ 4
Diameter of Mounting Hardware
Anchoring to Concrete Floors
.................1⁄2"
Assembly
Needed for Setup
listed items.
parts that are
To assemble machine:
Attach column assembly to base with M10-
1.
1.5 x 30 hex bolts (see Figure 13).
Column
Assembly
Base
Machine Base
Concrete
Figure 12. Popular method for anchoring
machinery to a concrete floor.
Model T33903/T33904 (Mfd. Since 07/23)
Lag Screw
Flat Washer
Lag Shield Anchor
Drilled Hole
Figure 13. Column assembly attached to base.
2.
Mark top of rack, as shown in Figure 14, to
keep track of which end is up.
Loosen set screw shown in Figure 14 to
3.
remove column collar.
Column
Collar
Rack
Figure 14. Example of marking top of rack.
-19-
Page 22
4. T33903: Place rack inside of table support
bracket, mesh it with pinion, and slide bracket
over column, as shown in Figure 15.
Slide column collar over column with beveled
5.
edge facing down, as shown in Figure 17,
then fit beveled edge of collar over rack and
tighten set screw to secure.
Table Support Bracket
Column
Figure 15. Example of sliding table support
bracket and rack over column.
T33904: Place rack inside of table assembly,
mesh it with pinion, and slide table assembly
over column, as shown in Figure 16.
Rack
Rack
Note: Do not overtighten set screw or you
may split column collar. Also make sure rack
is seated firmly between column collar and
column base.
Beveled
Edge
Figure 17. Correct column collar orientation.
6. Install table height crank over worm shaft
shown in Figure 18, then tighten set screw in
crank against flat part of shaft to secure.
Table
Assembly
Figure 16. Sliding table assembly and rack over
-20-
Column
column.
Table Height
Crank
Figure 18. Table height crank installed (T33904
shown).
Model T33903/T33904 (Mfd. Since 07/23)
Page 23
7. T33903 Only: Install table in table support
bracket, then tighten table pivot lock handle
to secure (see Figure 19).
Table
Use measuring tape or ruler to find and mark
9.
center of base, then suspend plumb bob from
center of headstock spindle over base, as
shown in Figure 21.
Plumb
Bob
Table Pivot
Lock Handle
Figure 19. T33903 table installed.
8. With lifting help, carefully lift headstock and
slide it onto column (see Figure 20).
Table Support
Bracket
HEAVY LIF T!
Straining or crushing injury
may occur from improperly
lifting machine or some of
its parts. To reduce this risk,
get help from other people
and use a forklift (or other
lifting equipment) rated for
weight of this machine.
Figure 21. Example of aligning headstock with
center of base.
10.
Adjust headstock on column until it is directly
over center of base, as indicated by plumb
bob, then secure headstock by tightening (2)
set screws shown in Figure 20.
Place chuck guard over quill and secure by
11.
tightening Phillips head screw and hex nut
(see Figure 22).
Tip: Use table height crank to adjust table up
and to hold guard in place while you tighten
fasteners.
Figure 20. Headstock placed on column and
location of headstock set screws.
Model T33903/T33904 (Mfd. Since 07/23)
Chuck
Guard
Figure 22. Chuck guard installed.
-21-
Page 24
An arbor is included for the drill chuck that
comes with this machine. The following procedure
describes how to install the arbor in the chuck.
After the arbor is installed in the drill chuck, it
is very difficult to separate the assembly. If you
would like to use a different chuck in the future,
we recommend obtaining a new arbor.
IMPORTANT: DO NOT install the drill chuck
and arbor assembly
AFTER
the test run.
To join drill chuck and arbor:
1.
clean drill
chuck and arbor mating surfaces, especially
2.
3.
4. Hold assembly by the arbor and tap chuck
onto a block of wood with medium force, as
5. Attempt to separate drill chuck and arbor by
hand —if they separate, repeat Steps 3–4.
12. Thread downfeed handles into spindle hub
(see Figure 23).
Downfeed
Spindle
Hub
Handle
(1 of 3)
Joining Drill Chuck
& Arbor
into the spindle until
Figure 23. Downfeed handles installed.
Use acetone or lacquer thinner to
the bore.
Retract chuck jaws completely into chuck.
Insert small end of arbor into chuck.
illustrated below.
-22-
Figure 24. Tapping drill chuck/arbor on block of
wood.
Model T33903/T33904 (Mfd. Since 07/23)
Page 25
Test Run
Once assembly is complete, test run the machine
to ensure it is properly connected to power and
safety components are functioning correctly.
If you find an unusual problem during the test run,
immediately stop the machine, disconnect it from
power, and fix the problem BEFORE operating the
machine again. The
table in the
SERVICE section of this manual can help.
DO NOT start machine until all preceding
setup instructions have been performed.
Operating an improperly set up machine
ed results that can lead to serious injury,
Serious injury or death can result from
Troubleshooting
The Test Run consists of verifying the following:
1) The motor powers up and runs correctly, and
2) the switch disabling key disables the switch
properly.
using this machine BEFORE understanding
its controls and related safety information.
DO NOT operate, or allow others to operate,
machine until the information is understood.
To test run machine:
1. Clear all setup tools away from machine.
2. Connect machine to power supply.
3. Turn machine ON, verify motor operation,
and then turn machine OFF.
Motor should run smoothly and without
unusual problems or noises.
Remove switch disabling key, as shown in
4.
Figure 25.
Figure 25. Removing switch key from ON/OFF
switch.
may result in malfunction or unexpect-
death, or machine/property damage.
Model T33903/T33904 (Mfd. Since 07/23)
Try to start machine with ON/OFF switch.
5.
Machine should not start.
— If machine does not start, switch dis-
abling feature is working correctly.
Congratulations! Test Run is complete.
Complete Spindle Break-In before pro-
ceeding with operations.
— If machine does start, immediately stop
machine. Switch disabling feature is not
working correctly. This safety feature must
work properly before proceeding with regular operations. Call Tech Support for
help.
-23-
Page 26
Spindle Break-In
The spindle break-in procedure distributes lubrication
reduce the risk
of early
if there are any "dry" spots
or areas where lubrication has settled in the bearings. You
efore
placing
for the
first time when the machine is new or if it has been
sitting idle for longer than 6 months.
Always start the spindle break-in at the lowest
speed to minimize wear if there
dry spots.
Allow the spindle to run long enough to warm up
and distribute the bearing grease, then incrementally increase spindle speeds and repeat this process at each speed until reaching the maximum
spindle speed. Following the break-in procedure
in this progressive manner helps minimize any
potential wear that could occur before lubrication
is fully distributed.
To perform spindle break-in:
Make sure spindle area is free of obstructions.
1.
throughout the bearings to
bearing failure
must complete this procedure b
operational loads on the spindle
are
Complete spindle bearing break-in procedure to prevent rapid wear and tear of spindle components once drill press is placed
into operation.
2. Configure V-belts for a spindle speed of
210 RPM. Refer to Changing Spindle Speed
on Page 29.
Connect machine to power and run spindle
3.
for 10 minutes.
Turn machine OFF, allow spindle to come
4.
to a complete stop, then DISCONNECT
MACHINE FROM POWER!
Configure V-belts for spindle speed of 390
5.
RPM (refer to Changing Spindle Speed on
Page 29), then connect machine to power.
Run spindle for 5 minutes at 390 RPM.
6.
Repeat Steps 4–6 for each speed listed
7.
below in progressive order.
a. 1130 RPM
b. 1735 RPM
c. 3020 RPM
Turn machine OFF.
8.
Congratulations! Spindle break-in is now complete.
-24-
Model T33903/T33904 (Mfd. Since 07/23)
Page 27
SECTION 4: OPERATIONS
The purpose of this overview is to provide the
novice machine operator with a basic understanding of how the machine is used during operation,
so the
discussed
later in this manual
Due to the generic nature of this overview, it is
not intended to be an instructional guide. To learn
more about specific operations, read this entire
manual,
training from experienced
machine operators, and do additional research
outside of this manual by reading "how-to" books,
trade magazines, or websites.
To reduce your risk of
serious injury, read this
entire manual BEFORE
Keep hair, clothing, and
ing parts at all times.
Entanglement can result
in death, amputation, or
using machine.
To reduce risk of eye or face injury from
flying chips, always wear approved safety
glasses and a face shield when operating
this machine.
Operation Overview
machine controls/components
are easier to understand.
seek additional
1. Examines workpiece to make sure it is suit-
able for drilling.
jewelry away from mov-
severe crushing injuries!
If you are not experienced with this type
of machine, WE STRONGLY RECOMMEND
that you seek additional training outside of
this manual. Read books/magazines or get
formal training before beginning any projects. Regardless of the content in this section, Grizzly Industrial will not be held liable
for accidents caused by lack of training.
Puts on required safety glasses and face
2.
shield.
Firmly secures workpiece to table using a
3.
vise or T-slot clamps.
Installs correct drill bit for operation.
4.
5. Adjusts table to correct height, then locks it in
place.
Selects appropriate spindle speed according
6.
to drill bit speed chart located on Page 28,
and adjusts belts to required pulley sheaves.
Connects machine to power, and turns
7.
machine ON.
Performs drilling operation.
8.
9. When finished, turns machine OFF and dis-
connects it from power.
Model T33903/T33904 (Mfd. Since 07/23)
-25-
Page 28
Installing/Removing
5. Use acetone or lacquer thinner to clean mat-
ing surfaces of arbor and spindle socket.
Arbor
Usually, once the chuck and arbor have been
properly mounted together, they are considered
semi-permanent connections. If you would like to
install a different chuck, we recommend getting a
new arbor for that chuck.
Installing Arbor in Spindle
Items Needed Qty
Phillips Head Screwdriver #2 ............................ 1
Open-End Wrench 7mm
Acetone or Lacquer Thinner
Rubber Mallet
To install arbor in spindle:
1. DISCONNECT MACHINE FROM POWER!
2. Loosen screw and hex nut shown in Figure
26 to slide chuck guard off of quill and
remove.
.................................................... 1
.................................... 1
.............. As Needed
6. Slide arbor into spindle socket while slowly
rotating chuck to line up tang on arbor with
slot in socket (see Figure 27).
Spindle Socket
Arbor Tang
Figure 27. Example of arbor tang aligned with
spindle socket.
7. Strike face of chuck from below with rubber-
faced mallet to seat arbor in spindle.
Chuck Guard
Figure 26. Location of chuck guard fasteners.
3. Join chuck and arbor (refer to Joining Drill
Chuck & Arbor on Page 22).
4. Rotate chuck on arbor until chuck jaws retract
into drill chuck body.
8. Check seat by gently pulling down on chuck.
9. Install chuck guard, then tighten screw and
hex nut from Step 2 to secure.
Tip: Use table to hold guard in place while
you tighten fasteners.
Scan this code to see a video of this installation process!
-26-
Model T33903/T33904 (Mfd. Since 07/23)
Page 29
Removing Arbor from Spindle
The arbor can be removed to install other Morse
Taper #4 tooling in the spindle. A drift key is
included to help remove the arbor or other tooling
from the spindle.
Items Needed Qty
Drift Key ............................................................. 1
Metal Hammer
Towel or Cloth
To remove arbor from spindle:
................................................... 1
.................................... As Needed
Outer Slot
Inner Slot
1. DISCONNECT MACHINE FROM POWER!
2. Rotate downfeed handles until drift key slot is
exposed in side of quill (see Figure 28).
Drift Key
Slot
Figure 28. Drift key slot exposed.
Move table up until it is 1⁄4" below bottom of
3.
chuck, and place towel or cloth under chuck.
4. Rotate spindle until inner drift key slot is
aligned with outer slot (see Figure 29). You
will see through spindle when slot is properly
aligned.
Figure 29. Example of inner and outer drift key
slots aligned.
5. Insert drift key into drift key slot, then tap drift
key with metal hammer (see Figure 30) until
chuck releases.
Figure 30. Example of using drift key to remove
arbor from spindle.
6. Use downfeed handles to retract quill back
into headstock.
Model T33903/T33904 (Mfd. Since 07/23)
-27-
Page 30
Choosing Spindle Speed
s
l
Sppaaddee//FFoorrssttnneerr BBiittss
l
Hoollee SSaawwss
l
Roosseettttee CCuutttteerrss
l
Teennoonn//PPlluugg CCuutttteerrss
l
Using Drill Bit Speed Chart
The chart shown in Figure 31 is intended as a
generic guide only. Always follow the manufacturer's speed recommendations if provided with
your drill bits, cutters, or hole saws. Exceeding
the recommended speeds may be dangerous to
the operator.
The speeds shown here are intended to get you
started. The optimum speed will always depend
on various factors, including tool diameter, drilling
pressure, material hardness, material quality, and
desired finish.
Often, when drilling materials other than wood,
some type of lubrication is necessary.
TTwwiisstt//BBrraadd PPooiinntt DDrriillll BBiitts
1/16" – 3/16" 3000 2500 2500 2500 3000 2500
13/64" – 3/8" 2000 1500 2000 1250 2500 1250
25/64" – 5/8" 1500 750 1500 750 1500 600
11/16" – 1" 750 500 1000 400 1000 350
SSoofftt WWooooddHHaarrdd WWooooddPPllaassttiiccBBrraassssAAlluummiinnuummMMiilldd SStteeeel
Lubrication Suggestions
Wood ...........................................................None
Plastics
Brass
Aluminum
Mild Steel
Larger bits turning at slower speeds tend
to grab workpiece aggressively. This can
result in operator's hand being pulled into
bit or workpiece being thrown with great
force. Always clamp workpiece to table to
prevent reduce risk of injury.
............................................Soapy Water
...............................Water-Based Lubricant
..................... Paraffin-Based Lubricant
............................. Oil-Based Lubricant
S
1-1/8" – 1-7/8" 1000 750
R
Carbide Insert Type 350 250
One-Piece Type 1800 500
T
SSoofftt WWooooddHHaarrdd WWooooddPPllaassttiiccBBrraassssAAlluummiinnuummMMiilldd SStteeeel
1/4" – 1/2" 2000 1500
9/16" – 1" 1500 1250
2–3" 500 350
H
1/2" – 7/8" 500 500 600 600 600 500
1" – 1-7/8" 400 400 500 500 500 400
2" – 2-7/8" 300 300 400 400 400 300
3" – 3-7/8" 200 200 300 300 300 200
4" – 5" 100 100 200 200 200 100
3/8" – 1/2" 1200 1000
5/8" – 1" 800 600
SSoofftt WWooooddHHaarrdd WWooooddPPllaassttiiccBBrraassssAAlluummiinnuummMMiilldd SStteeeel
SSoofftt WWooooddHHaarrdd WWooooddPPllaassttiiccBBrraassssAAlluummiinnuummMMiilldd SStteeeel
SSoofftt WWooooddHHaarrdd WWooooddPPllaassttiiccBBrraassssAAlluummiinnuummMMiilldd SStteeeel
Figure 31. Drill bit speed chart (RPMs).
-28-
Model T33903/T33904 (Mfd. Since 07/23)
Page 31
Changing
Spindle Speed
The spindle has twelve speeds that operate
between 210–3020 RPM. Spindle speed is controlled by the configuration of V-belts and pulleys
located inside the belt cover (refer to the speed
chart located under the belt cover).
Use care when changing V-belts as they
could pinch your fingers. They may also
get hot after extended use so wait to
change speeds if drill has been in use.
5. Rotate belt tension lever counterclockwise to
take tension off V-belts (see Figure 33).
Belt Tension
Lever
Figure 33. Location of belt tension lever.
Tools Needed Qty
Open-End Wrenches 14mm .............................. 2
To change spindle speed:
1. DISCONNECT MACHINE FROM POWER!
2. Open belt cover.
3. Determine correct spindle speed for
operation (see Choosing Spindle Speed on
Page 28).
4. Loosen (2) belt tension locks, and loosen (2)
hex nuts shown in Figure 32.
Belt
Tension
Lock
(1 of 2)
x 2
— If V-belt is cracked, torn, excessively worn,
or damaged, replace it.
6. Move V-belts onto desired sheaves on motor,
idler, and spindle pulleys (see Figure 34).
Spindle Pulley
Motor Pulley
Idler Pulley
V-Belts
Figure 34. V-belt components.
For Example: As indicated on speed chart
inside belt cover, a belt combination of B-3
creates 610 RPM. "B" refers to belt position
between spindle and idler pulley. "3" refers to
belt position between idler and motor pulley.
Figure 32. Location of belt tension locks and hex
nut.
Model T33903/T33904 (Mfd. Since 07/23)
7. Rotate belt tension lever clockwise until
V-belts are tight.
8. Tighten belt tension locks, tighten (2) hex
nuts shown in Figure 32, then close belt
cover.
-29-
Page 32
Installing/Removing
Adjusting
Drill Bit
Any drill bit you install in the chuck must be
tight enough that it will not come loose during
operation.
Item Needed Qty
Chuck Key ......................................................... 1
Rag ................................................................... 1
Installing Drill Bit
1. DISCONNECT MACHINE FROM POWER!
2. Open drill chuck wide enough to accept
shank of drill bit.
Insert drill bit as far as possible into chuck
3.
WITHOUT allowing chuck jaws to touch
fluted portion of bit, then hand-tighten chuck.
Note: Make sure small bits are not trapped
between edges of two jaws; if they are, reinstall drill bit or it will not be secure enough
to use for drilling.
Depth Stop
The Model T33903/T33904 has a depth stop that
allows you to drill repeat non-through holes to the
same depth every time. The scale on the front of
the depth stop shows the depth in inches.
The depth stop consists of a threaded rod
attached to the quill with a depth stop nut that
can be lowered or raised against a stop bracket
to control drilling depth. Figure 36 shows the
various components of the depth stop.
Quick-Release
Button
Stop Bracket
Depth Stop
Nut
Threaded Rod
w/Scale
Tighten chuck firmly with chuck key (see
4.
Figure 35), then remove chuck key from
chuck.
Figure 35. Example of tightening chuck with
chuck key.
Removing Drill Bit
1. DISCONNECT MACHINE FROM POWER!
Figure 36. Depth stop components.
To adjust depth stop:
1.
Lower drill bit to required height.
2. Thread depth stop nut down against stop
bracket.
Tip: Press quick-release button on depth
stop nut to quickly adjust nut up or down on
rod.
Note: Scale on depth stop can be calibrated
if it gets moved or has changed since the factory setting. Refer to Calibrating Depth Stop
on Page 43 for instructions on how this is
done.
2. Use chuck key to open drill chuck, and catch
drill bit with rag to protect your hands.
-30-
Model T33903/T33904 (Mfd. Since 07/23)
Page 33
Positioning Table
(T33903)
The Model T33903 table moves vertically, rotates
360° around its center, rotates 360° around the
column, and tilts 45° left or right. Remove any
loose objects from the table surface before adjusting the table position using the controls shown in
Figure 37.
Table
Height
Crank
Rotating Table Around Center
1. Loosen table pivot lock handle (see Figure
37).
. Rotate table to desired position, then tighten
2
table pivot lock handle to secure.
Rotating Table Around Column
1. Loosen table height lock handle (see Figure
37).
. Rotate table to desired location on column,
2
making sure to guide column rack with table
(see Figure 37), then tighten table height
lock handle to secure.
Tilting Table
Tool Needed Qty
Wrench or Socket 30mm ................................... 1
To tilt table:
Table Pivot
Lock Handle
Table Height
Lock Handle
Tilt Scale
Figure 37. Table adjustment components.
Pointer
Rack
Raising/Lowering Table
1. Loosen table height lock handle (see
Figure 37).
. Raise or lower table by rotating table height
2
crank (see Figure 37), then tighten table
height lock handle to secure.
1. Loosen hex bolt shown in Figure 38.
Figure 38. Location of hex bolt.
2. Tilt table until pointer aligns with desired
angle on tilt scale (see Figure 37).
. Tighten hex bolt from Step 1 to secure table
3
angle.
Model T33903/T33904 (Mfd. Since 07/23)
-31-
Page 34
Positioning Table
(T33904)
. Tilt table until pointer aligns with desired
2
angle on scale (see Figure 41).
The Model T33904 table moves vertically, rotates
360° around the column, and tilts 45° left or right.
Remove any loose objects from the table surface
before adjusting the table position.
Raising/Lowering Table
1. Loosen table height lock handle (see Figure
39).
. Raise or lower table by rotating table height
2
crank (see Figure 39), then tighten table
height lock handle to secure.
Table
Height
Crank
Table Height
Lock Handle
Figure 39. Table height controls.
Tilt Angle
Scale
Pointer
Figure 41. Location of table tilt scale and pointer.
3. Tighten hex bolt from Step 1 to secure table
angle.
Rotating Table Around Column
1. Loosen table height lock handle (see Figure
42).
. Rotate table to desired location on column,
2
making sure to guide column rack with table
(see Figure 42), then tighten table height
lock handle to secure.
Tilting Table
Tool Needed Qty
Wrench or Socket 30mm ................................... 1
To tilt table:
1. Loosen hex bolt shown in Figure 40.
Figure 40. Location of hex bolt.
-32-
Column
Rack
Table Height
Lock Handle
Figure 42. Location of table height lock handle
and column rack.
Model T33903/T33904 (Mfd. Since 07/23)
Page 35
Adjusting
Laser Guide
The laser guide should be checked and adjusted
for accuracy when you change drill bits, raise or
lower the table, or change workpiece thickness.
— If laser crosshairs align with indentation
you made in Step 5 (see Figure 44), no
adjustment is necessary.
— If laser crosshairs do not align with inden-
tation you made in Step 5 (see Figure
44), proceed to Step 7.
DO NOT look directly into laser. Eye injury
may result.
Item Needed Qty
Hex Wrench 3mm .............................................. 1
To adjust laser guide:
1. DISCONNECT MACHINE FROM POWER!
Install drill bit in chuck (see Installing/
2.
Removing Drill Bit on Page 30).
Clamp workpiece to table.
3.
Adjust table so workpiece is just below drill
4.
bit, then lock table in position.
Lower drill bit so it touches workpiece, mak-
5.
ing slight indentation in surface, then raise
bit.
Indentation
Figure 44. Example of laser crosshairs aligned
with indentation on workpiece.
. Loosen (2) set screws shown in Figure 45,
7
then adjust laser modules by hand, positioning them so crosshairs align with indentation
you made in Step 5.
x 2
. Connect drill press to power. Use laser switch
6
to turn laser guide ON (see Figure 43).
Laser Switch
Figure 43. Location of laser switch.
Model T33903/T33904 (Mfd. Since 07/23)
Laser
(1 of 2)
Figure 45. Laser module adjustment
components.
— Turning each laser module will adjust each
crosshair line angle.
— Adjusting laser module position in seat will
adjust crosshair line positions.
. Once crosshairs are aligned with indenta-
8
tion in workpiece, tighten screws loosened in
Step 7 to secure laser module positions.
-33-
Page 36
ACCESSORIES
Installing unapproved accessories may
order online at www.grizzly.com or call 1-800-523-4777
SECTION 5: ACCESSORIES
cause machine to malfunction, resulting in
serious personal injury or machine damage.
To reduce this risk, only install accessories
recommended for this machine by Grizzly.
NOTICE
Refer to our website or latest catalog for
additional recommended accessories.
SB1365—South Bend Way Oil-ISO 68
T26419—Syn-O-Gen Synthetic Grease
T32710—Drill Press Table w/Flip-Stop Fence
This table will increase your usable workspace.
The 26" long fence features a T-slot with two
adjustable flip stops and an easy-to-read scale
with imperial measurements. Fence slides in
3
⁄4" x 153⁄4" table embedded T-slots.
23
SB1365
T26419
Figure 46. Recommended lubrication products.
G5562—SLIPIT® 1 Qt. Gel
G5563—SLIPIT® 11 Oz. Spray
Figure 48. T32710 Drill Press Table w/Flip-Stop
Fence.
T33682—Drill Press Tray
This tray keeps all you drill press accessories
ready to go at your fingertips, making projects
more efficient and enjoyable. It will hold a 29-piece
drill bit set in the embossed holes and has room
for other accessories. Easy to install and use with
mount clamps to attach to your drill press column.
Figure 49. T33682 Drill Press Tray.
Figure 47. Recommended products for
protecting unpainted cast-iron and steel.
-34-
Model T33903/T33904 (Mfd. Since 07/23)
Page 37
order online at www.grizzly.com or call 1-800-523-4777
Table T-Slot Nuts for T33903
G9515—T-Slot Nuts, 4-Pk., 5⁄8" Slot, 1⁄2"-13
Table T-Slot Nuts for T33904
G9513—T-Slot Nuts, 4-Pk., 9⁄16" Slot, 3⁄8"-16
G9514—T-Slot Nuts, 4-Pk.,
Heat-treated steel T-slot nuts with black oxide
finish feature an imperfect thread in the base of
the nut to eliminate any danger of screwing the
clamping stud through and damaging the table
slot.
Figure 50. G9514 T-Slot Nuts.
1
G8583—
⁄32"–5⁄8" x JT3 Keyless Drill Chuck
Industrial-grade keyless chucks are excellent for
quick bit changes. Knurled grips and exceptional
accuracy make these chucks an indispensable
part of any shop. Use on drill presses, lathe tailstocks and milling machines.
with a Jacobs Taper #3 in back.
9
⁄16" Slot, 1⁄2"-13
1
⁄32"–5⁄8" capacity
T30015—HSS M35 Cobalt 115-Pc. Drill Bit Set
The bits in this 115-piece set all have 135˚ split
points and fully ground flutes. Fractional sizes
1
⁄16"–1⁄2 " in increments of 1⁄64", letter bits from A–Z,
and 60 number bits.
Figure 52. T30015 115-Pc. HSS M35 Cobalt
Drill Bit Set.
T10169—Adjustable Circle Cutter
Produce precision circles in sheet metal, brass,
wood, plastic, aluminum, and soft steel with this
adjustable circle cutter. The diameter if adjustable
up to 8" and includes HSS center and drill bit and
double-ended tool bit. Always use the appropriate
cutting speed for the circle diameter to prolong
tool life.
Figure 53. T10169 Adjustable Circle Cutter.
Figure 51. G8583 1⁄32"–5⁄8" x JT3 Keyless Drill
Chuck.
Model T33903/T33904 (Mfd. Since 07/23)
-35-
Page 38
SECTION 6: MAINTENANCE
accidental startup, always
disconnect machine from
Cleaning &
To reduce risk of shock or
power before adjustments,
maintenance, or service.
Schedule
For optimum performance from this machine, this
maintenance schedule must be strictly followed.
Ongoing
To minimize your risk of injury and maintain proper
machine operation, shut down the machine immediately if you ever observe any of the items below,
and fix the problem before continuing operations:
• Loose mounting bolts.
• Worn switch.
Worn or damaged wires.
•
• Damaged V-belt.
• Any other unsafe condition.
Weekly Maintenance
• Lubricate quill and column surfaces
(Page 37).
Protecting
Cleaning your drill press is relatively easy. Vacuum
excess wood chips and sawdust, and wipe off the
remaining dust with a dry cloth. If any resin has
built up, use a resin dissolving cleaner to remove
it.
Protect the unpainted cast iron table and base
by wiping it clean after every use—this ensures
moisture from wood dust does not remain on bare
metal surfaces. Keep the table and base rust-free
with regular applications of metal protectant products like SLIPIT
on Page 34).
®
(see Figure 47 in Accessories
Lubrication
An essential part of lubrication is cleaning the
components before lubricating them.
This step is critical because grime and chips build
up on lubricated components, which makes them
hard to move. Simply adding more lubricant will
not result in smooth moving parts.
Monthly Maintenance
• Check V-belt for damage or wear.
• Lubricate column rack and quill rack and
pinion (Page 37).
• Clean/vacuum dust buildup off motor.
-36-
Lubricate components with recommended products like those shown Figure 46 in Accessories
on Page 34.
DISCONNECT MACHINE FROM POWER
BEFORE PERFORMING LUBRICATION!
Model T33903/T33904 (Mfd. Since 07/23)
Page 39
Quill & Column Surfaces
Oi l Ty pe .... Grizzly SB1365 or ISO 68 Equivalent
Oil Amount
Lubrication Frequency
............................................Thin Coat
...........8 Hrs. of Operation
Column Rack, Quill Rack & Pinion
Grease Type .... Grizzly T26419 or NLGI#2 Equiv.
Grease Amount
Lubrication Frequency
....................................Thin Coat
......... 90 hrs. of Operation
Items Needed Qty
Mineral Spirits .................................... As Needed
Shop Rags
Move the spindle all the way down to access
the smooth surfaces of the quill. Adjust the table
height as necessary to access the entire length of
the column (see Figures 54–55). Clean both with
mineral spirits and shop rags.
Note: Avoid removing the grease from the column
and quill racks during cleaning.
Quill
Surface
......................................... As Needed
Items Needed Qty
Mineral Spirits .................................... As Needed
Shop Rags
Stiff Brushes
Move spindle all the way down to gain access to
quill rack (see Figure 56), then clean teeth with
mineral spirits, shop rags, and a brush.
Clean the column rack teeth (see Figure 56) in
a similar manner with mineral spirits, shop rags,
and a brush.
......................................... As Needed
...................................................... 2
Quill Rack
Figure 54. Spindle moved down to expose quill
surface.
Column
Surfaces
Figure 55. Column surface locations (T33904
shown).
After cleaning, allow mineral spirits to dry, then
apply a thin coat of oil to the surfaces.
Column Rack
Figure 56. Example of quill and column racks
exposed.
Allow mineral spirits to dry, then use a brush to
apply a thin coat of grease to the rack teeth, then
fully raise/lower the quill and table to distribute the
grease.
Model T33903/T33904 (Mfd. Since 07/23)
-37-
Page 40
Review the troubleshooting procedures in this section if a problem develops with your machine. If you need
replacement parts or additional help with a procedure, call our Technical Support.
the
serial number and manufacture date of your machine before calling.
SECTION 7: SERVICE
Troubleshooting
Motor & Electrical
Symptom Possible Cause Possible Solution
Machine does
not start, or
power supply
breaker
immediately
trips after
startup.
Machine
stalls or is
underpowered.
Machine has
vibration or
noisy operation.
1. Switch disabling key removed.
2. Incorrect power supply voltage or circuit size.
3. Power supply circuit breaker tripped or fuse
blown.
4. Motor wires connected incorrectly.
5. Start capacitor at fault.
6. Centrifugal switch adjustment/contact points
at fault.
7. Wiring broken, disconnected, or corroded.
8. ON/OFF switch at fault.
9. Motor or motor bearings at fault.
1. Workpiece material unsuitable for machine.
2. Feed rate/cutting speed too fast.
3. Belt(s) slipping/pulleys misaligned.
4. Motor wires connected incorrectly.
5. Pulley slipping on shaft.
6. Machine undersized for task.
7. Motor overheated.
8. Run capacitor at fault.
9. Extension cord too long.
10. Centrifugal switch/contact points at fault.
11. Motor or motor bearings at fault.
1. Motor or component loose.
2. V-belt(s) worn, loose, pulleys misaligned or
belt slapping cover.
3. Pulley loose.
4. Motor mount loose/broken.
5. Spindle loose, improperly installed or
damaged.
6. Workpiece loose.
1. Install switch disabling key.
2. Ensure correct power supply voltage and circuit size
(Page 13).
3. Ensure circuit is free of shorts. Reset circuit breaker
and replace fuse.
4. Correct motor wiring connections (Page 47).
5. Test/replace if at fault.
6. Adjust centrifugal switch/clean contact points. Replace
either if at fault.
7. Fix broken wires or disconnected/corroded
connections (Page 47).
8. Replace switch.
9. Replace motor.
1. Only cut wood with moisture below 20% and correct
type/size of metal.
2. Decrease feed rate/cutting speed (Page 29).
3. Clean/tension/replace belt(s) (Page 29); ensure
pulleys are aligned (Page 42).
4. Correct motor wiring connections (Page 47).
5. Tighten/replace loose pulley/shaft.
6. Use sharp bits/reduce feed rate/reduce spindle RPM
(Page 29).
7. Clean motor, let cool, and reduce workload.
8. Test/repair/replace.
9. Move machine closer to power supply; use shorter
extension cord (Page 14).
10. Adjust centrifugal switch/clean contact points. Replace
either if at fault.
11. Replace motor.
1. Replace damaged or missing bolts/nuts or tighten if
loose.
2. Inspect/replace belts with a new matched set (Page
29). Realign pulleys if necessary (Page 42).
3. Secure pulley on shaft.
4. Tighten/replace.
5. Tighten loose spindle, re-install spindle ensuring
mating surfaces are clean, replace spindle if damaged.
6. Usecorrectholdingxtureandreclampworkpiece.
Note: Please gather
-38-
Model T33903/T33904 (Mfd. Since 07/23)
Page 41
Motor & Electrical (Cont.)
Symptom Possible Cause Possible Solution
Machine has
vibration or
noisy operation.
LED does not
illuminate.
Laser guide
does not
illuminate.
7. Chuck or cutter at fault.
8. Motor fan rubbing on fan cover.
9. Spindle bearings at fault.
10. Centrifugal switch needs adjustment/at fault.
11. Motor bearings at fault.
1. Lens covered with dust.
2. Wiring broken, disconnected, or corroded.
3. LED or LED driver damaged/at fault.
4. LED switch at fault.
1. Lens covered with dust.
2. Wiring broken, disconnected, or corroded.
3. Laser module(s) damaged/at fault.
4. Laser switch at fault.
5. Laser LED driver at fault.
7. Replace out-of-round chuck, dull, or bent cutter.
8. Fix/replace fan cover; replace loose/damaged fan.
9. Test by rotating spindle; rotational grinding/loose shaft
requires bearing replacement.
10. Adjust/replace if at fault.
11. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
1. Clean lens.
2. Fix broken wires or disconnected/corroded
connections (Page 47).
3. Replace LED or driver (Page 44).
4. Replace switch.
1. Clean lens.
2. Fix broken wires or disconnected/corroded
connections (Page 47).
3. Replace lase module(s) (Page 44).
4. Replace switch.
5. Replace laser LED driver.
Operation
Symptom Possible Cause Possible Solution
Tool falls out or
loose in chuck.
Chuck and
arbor fall out
or loose in
spindle.
Breaking tools
or cutters.
Workpiece or
tool vibrates or
chatters during
operation.
Table hard to
move.
Backside of
workpiece
splinters.
1. Chuck jaws loose.
2. Excessive feed pressure.
1. Debris on chuck, arbor, or in spindle taper.
2. Excessive feed pressure.
1. Spindle speed/feed rate too fast.
2. Taking too big of cut at one time.
3. Improper cutting technique or type of cut for
tool/machine.
4. Cutting tool too small.
5. Cutting tool getting too hot.
6. Spindle extended too far down during or at
beginning of operation.
1. Spindle extended too far down during or at
beginning of operation.
2. Table lock handles not tight.
3. Workpiece not secure.
4. Spindle speed/feed rate too fast.
5. Quill shaft lock screw not adjusted correctly.
1. Table locked.
2. Dirty or dry rack and pinion.
1. Scrap board not installed between table and
workpiece.
1. Tighten chuck jaws.
2. Decrease feed pressure and allow chips to clear.
1. Clean chuck, arbor, and spindle taper, then re-install
(Page 22).
2. Decrease feed pressure and allow chips to clear.
1. Reduce spindle speed (Page 29); reduce feed rate.
2. Decrease feed pressure and allow chips to clear.
3. Use right technique, tool, or machine for job.
4. Use larger cutting tool and slower feed rate.
5. Use coolant or oil for appropriate application; reduce
cutting speed (Page 29).
6. Fully retract spindle and raise table to increase rigidity.
1. Fully retract spindle and raise table to increase rigidity.
2. Tighten table lock handles (Page 32).
3. Properly clamp workpiece on table or in vise.
4. Reduce spindle speed (Page 29); reduce feed rate.
5. Adjust quill shaft lock screw (Page 46).
1. Disengage table locks (Page 32).
2. Clean away chips/debris. Lubricate rack and pinion
(Page 37).
1. Install scrap board between table and workpiece.
Model T33903/T33904 (Mfd. Since 07/23)
-39-
Page 42
Operation (Cont.)
Symptom Possible Cause Possible Solution
Bad surface
nish.
Spindle
overheats.
Spindle does
not fully retract.
Drill bit drifts. 1. Dull/incorrectly sharpened drill bit.
Drill bit slips in
chuck or stuck
in workpiece.
Workpiece
thrown from
table.
Excessive
runout or
wobbling in
chuck/drill bit.
1. Spindle speed/feed rate too fast.
2. Dull or incorrect cutting tool/bit.
3. Workpiece not secure.
4. Spindle extended too far down during or at
beginning of operation.
1. Machine operated at high speeds for
extended period.
1. Poorly adjusted return spring.
2. Debris on spindle/quill rack.
3. Worn return spring.
2. Tool/bit/chuck incorrectly installed.
1. Chuck jaws loose.
2. Workpiece squeezing drill bit.
3. Feed rate too fast.
4. Spindle speed/feed rate to slow.
1. Workpiece not secure.
2. Tool/bit too large for feed speed.
1. Debris on chuck, arbor, or in spindle taper.
2. Tool/bit bent.
3. Tool/bit installed incorrectly.
4. Spindle bearings worn.
1. Reduce spindle speed (Page 29); reduce feed rate.
2. Sharpen cutting tool or select one that better suits
operation.
3. Properly clamp workpiece on table or in vise.
4. Fully retract spindle and raise table to increase rigidity.
1. Allow drill to cool.
1. Increase return spring tension (Page 41).
2. Clean and lubricate spindle/quill rack (Page 37).
3. Replace return spring.
1. Correctly sharpen drill bit.
2. Correctly install tool/bit (Page 30)/chuck
(Page 26).
1. Tighten chuck jaws.
2. Properly clamp workpiece on table or in vise.
3. Decrease feed rate.
4. Increase spindle speed (Page 29)/feed rate.
1. Properly clamp workpiece in table or in vise.
2. Use smaller tool/bit or decrease feed speed.
1. Remove chuck and arbor, clean chuck, arbor, and
spindle taper, then re-install (Page 26). Deburr
mating surfaces, if necessary.
2. Replace with straight tool/bit.
3. Install tool/bit correctly (Page 30) or replace.
4. Replace spindle bearings.
-40-
Model T33903/T33904 (Mfd. Since 07/23)
Page 43
Adjusting Return
Spring Tension
The spring tension for automatic quill recoil has
been pre-set at the factory. In most cases, it will
never need to be re-adjusted during the life of the
machine. However, if the quill stops automatically
recoiling, the spring may need to be adjusted for
additional tension. If it does need adjustment, the
spring housing is located on the left side of the
headstock (see Figure 57).
Spring
Cover
2. Wipe any oil off spring cover so it does not slip
in your fingers in following steps (see Figure
57).
3. Hold spring cover against side of headstock
so cover stays splined with locking screw,
then loosen cap screw and cover nut
approximately
IMPORTANT: Hold spring cover tightly dur-
ing Step 4, or force of spring will cause cover
to spin out of your hands.
4. Wearing gloves, pull spring cover outward
just enough to disengage spring cover notch
from locking screw (see Figure 57).
5. Rotate cover counterclockwise to increase
tension, or clockwise to reduce spring tension.
1
⁄4" each (see Figure 57).
Cap Screw
& Cover Nut
Spring Cover Notch
& Locking Screw
Figure 57. Spring adjustment components.
If return spring should come
loose from spring cover and
rapidly unwind, laceration
or impact injuries could
occur. Always wear heavy
leather gloves and safety
glasses when adjusting
return spring tension.
6. Engage next available spring cover notch
with locking screw (see Figure 58) and hold
spring cover tightly to side of headstock.
Locking
Screw
Spring Cover
Notch
(1 of 6)
Figure 58. Location of spring cover notches and
locking screw.
7. Tighten cover nut and cap screw.
Items Needed Qty
Heavy Leather Gloves ..................................1 Pr.
Safety Glasses
Shop Rags
Hex Wrench 5mm
To adjust spring tension:
1. DISCONNECT MACHINE FROM POWER!
Model T33903/T33904 (Mfd. Since 07/23)
.............................................1 Pr.
......................................... As Needed
.............................................. 1
Check tension adjustment by downfeeding
8.
spindle. Spindle should return quickly when
downward pressure is released.
— If spindle does not retract quickly, repeat
Steps 3–7, and re-check tension until
return speed is adequate.
-41-
Page 44
Aligning Pulleys
Pulley alignment is an important factor in power
transmission and belt life. The pulleys should
be parallel to each other and in the same plane
(coplanar) for optimum performance.
The spindle and motor pulleys can be adjusted by
loosening the set screws that secure them to their
respective shafts.
Tools Needed Qty
Open-End Wrenches 14mm .............................. 2
Hex Wrenches 3, 4mm
Straightedge 12"
To align pulleys:
1. DISCONNECT MACHINE FROM POWER!
................................................ 1
................................ 1 Ea.
Use care when handling V-belts as they
could pinch your fingers. They may also
get hot after extended use so wait to handle if drill has been in use.
4. Remove V-belts (refer to Changing Spindle
Speed on Page 29 for instructions on
releasing V-belt tension).
— If V-belt is cracked, torn, excessively worn,
or damaged, replace it.
Loosen set screw on spindle pulley, adjust
5.
pulley on shaft until it aligns with idler pulley,
then tighten set screw (see Figure 59).
Place straightedge against idler and motor
6.
pulleys and check that they are aligned.
2. Open belt cover.
Place straightedge against spindle and idler
3.
pulleys (see Figure 59) and check that they
are aligned. There should be no space anywhere between straightedge or pulleys.
Straightedge
Spindle Pulley
Figure 59. Checking pulley alignment.
— If pulleys are aligned, proceed to Step 6.
Idler Pulley
— If pulleys are aligned, proceed to Step 9.
— If pulleys are not aligned, proceed to
Step 7.
If you have not already done so, remove
7.
V-belts (refer to Changing Spindle Speed
on Page 29 for instructions on releasing
V-belt tension).
— If V-belt is cracked, torn, excessively worn,
or damaged, replace it.
Loosen set screw on motor pulley and adjust
8.
pulley on shaft until it aligns with idler pulley,
then tighten set screw.
9. If V-belt were removed, install V-belts for
desired spindle speed. Refer to Changing
Spindle Speed on Page 29 for more
information.
10. Close belt cover.
— If pulleys are not aligned, proceed to
Step 4.
-42-
Model T33903/T33904 (Mfd. Since 07/23)
Page 45
Calibrating
Depth Stop
The depth stop allows you to drill multiple holes at
the same depth. The scale on this depth stop can
be calibrated if it ever becomes incorrect.
Loosen hex nut shown in Figure 61.
3.
Adjust depth rod up in depth collar a couple
4.
turns (see Figure 61).
Tool Needed Qty
Wrench or Socket 19mm ................................... 1
To calibrate depth stop:
DISCONNECT MACHINE FROM POWER!
1.
2. Adjust depth stop nut all the way down so it
sits against stop bracket (see Figure 60).
Depth Stop
Nut
Stop Bracket
Depth Rod
Depth
Collar
Figure 61. Depth stop calibration components.
5. Adjust depth stop nut until top of nut indicates
0" on scale.
Adjust depth rod until depth stop nut sits
6.
against stop bracket and scale is visible.
While holding depth rod in place, tighten hex
7.
nut from Step 3 to secure setting.
Test depth stop by measuring how far spindle
8.
moves with respect to where you set depth
stop nut.
Figure 60. Depth stop nut adjusted all the way
down.
— If top of depth stop nut indicates 0" on
scale, no adjustment is necessary.
— If top of depth stop nut does not indicate 0"
on scale, proceed to Step 3.
Model T33903/T33904 (Mfd. Since 07/23)
-43-
Page 46
Replacing Laser
120V MOTOR
Run
Capacitor
CBB60
65µF
300VAC
Start
Capacitor
CD60
400µF
250VAC
Modules & LED
If either one of the laser modules or the LED
burns out and needs to be replaced, use the following sections. A wiring diagram is provided on
Page 48 for your reference.
Replacing Laser Module
Items Needed Qty
Hex Wrench 3mm .............................................. 1
Replacement Laser Module (#PT33904104)
Electrical Tape
Cable Ties
To replace laser module:
1.
DISCONNECT MACHINE FROM POWER!
................................... As Needed
......................................... As Needed
..... 1
4. Disconnect faulty laser module wires from
their wire nut connections (see Figure 63),
then fully remove laser module from headstock, pulling wires with it.
LED Driver
Wire Nuts
(3-5)X1W
Laser
Module
Wires
2. Loosen set screw securing faulty laser mod-
ule and pull laser module just enough to
remove it from headstock (see Figure 62).
. Turn light seat counterclockwise to release
3
LED assembly and pull it down through headstock hole to reveal laser module and LED
wires (see Figure 62).
Light Seat
Laser Module
(1 of 2)
Laser Modules
DKLD LDBXQ03B
LED
XINGZHEN 12V 3W
Figure 63. Laser module wiring.
. Insert new laser module wires up through
5
hole in headstock, and attach wires to wire
nuts as they were connected in Step 4. Wrap
wires at wire nuts with electrical tape so they
will not come loose during operation.
. Bind any stray laser module or LED wires and
6
cords together with electrical tape or cable
ties to keep electrical components from being
caught in moving headstock parts.
. Feed laser module and LED wires and cords
7
back into headstock, install light seat in headstock, then turn clockwise to secure.
. Refer to Adjusting Laser Guide on Page
8
33 to secure and adjust laser modules.
Figure 62. Location of laser modules and light
seat.
-44-
Model T33903/T33904 (Mfd. Since 07/23)
Page 47
Replacing LED
Items Needed Qty
Replacement LED (#PT33904106-1) ................. 1
Electrical Tape or Cable Ties
To replace LED:
DISCONNECT MACHINE FROM POWER!
1.
2. Turn light seat counterclockwise to release
seat and pull it down through headstock hole
(see Figure 64).
Light
Seat
............ As Needed
4. Disconnect LED from wire connector shown
in Figure 65 and replace with new LED.
LED
Light Seat
Figure 65. LED disconnect components.
. Install new LED in light seat.
5
6. Bind any stray laser module or LED wires and
cords together with electrical tape or cable
ties to keep electrical components from being
caught in moving headstock parts.
Light Seat Tab
(1 of 2)
Wire Connector
Figure 64. Location of light seat.
3. Move light seat tabs away from LED to
remove LED from light seat (see Figure 65).
. Feed laser module and LED wires and cords
7
back into headstock, install light seat in headstock, then turn clockwise to secure.
Model T33903/T33904 (Mfd. Since 07/23)
-45-
Page 48
Adjusting Quill Shaft
Lock Screw
While you may never have to adjust the quill shaft
lock screw (see Figure 66), you should understand its function and know how to adjust it should
you ever need to remove the quill for cleaning.
This screw can prevent the quill from rotating or
from retracting into the headstock. If it is adjusted
incorrectly, the quill may lash or bind.
To adjust quill shaft lock screw:
DISCONNECT MACHINE FROM POWER!
1.
2. Clean and lubricate quill as described in
Lubrication on Page 36. Quill should
travel freely.
. Loosen jam nut shown in Figure 66.
3
. Turn quill shaft lock screw (see Figure 66)
4
clockwise or counterclockwise to establish
free, unbinding travel while moving quill up
and down through its entire range of travel.
. When quill shaft lock screw is screwed
5
inward as far as the screw can go without
binding quill, hold screw in place and tighten
jam nut.
. Check for quill binding and looseness while
6
moving quill up and down through its entire
range of travel and readjust as required.
Figure 66. Location of quill shaft lock screw and
jam nut.
Tools Needed Qty
Open-End Wrench 17mm .................................. 1
Flat Head Screwdriver
1
⁄4" .................................. 1
-46-
Model T33903/T33904 (Mfd. Since 07/23)
Page 49
These pages are current at the time of printing. However, in the spirit of improvement, we may make changes to the electrical systems of future machines. Compare the manufacture date of your machine to the one
stated in this manual, and study this section carefully.
If there are differences between your machine and what is shown in this section, call Technical Support at
(570) 546-9663 for assistance BEFORE making any changes to the wiring on your machine. An updated
wiring diagram may be available.
number and manufacture date of your
machine before calling. This information can be found on the main machine label.
machine
SECTION 8: WIRING
Note: Please gather the serial
Wiring Safety Instructions
SHOCK HAZARD. Working on wiring that is con-
nected to a power source is extremely dangerous.
Touching electrified parts will result in personal
injury including but not limited to severe burns,
electrocution, or death. Disconnect the power
from the machine before servicing electrical components!
MODIFICATIONS. Modifying the wiring beyond
what is shown in the diagram may lead to unpredictable results, including serious injury or fire.
This includes the installation of unapproved aftermarket parts.
WIRE CONNECTIONS. All connections must
be tight to prevent wires from loosening during
machine operation. Double-check all wires disconnected or connected during any wiring task to
ensure tight connections.
CIRCUIT REQUIREMENTS. You MUST follow
the requirements at the beginning of this manual
when connecting your machine to a power source.
WIRE/COMPONENT DAMAGE. Damaged wires
or components increase the risk of serious personal injury, fire, or machine damage. If you notice
that any wires or components are damaged while
performing a wiring task, replace those wires or
components.
MOTOR WIRING. The motor wiring shown in
these diagrams is current at the time of printing
but may not match your machine. If you find this
to be the case, use the wiring diagram inside the
motor junction box.
CAPACITORS/INVERTERS. Some capacitors
and power inverters store an electrical charge for
up to 10 minutes after being disconnected from
the power source. To reduce the risk of being
shocked, wait at least this long before working on
capacitors.
EXPERIENCING DIFFICULTIES. If you are experiencing difficulties understanding the information
included in this section, contact our Technical
Support at (570) 546-9663.
The photos and diagrams
included in this section are
best viewed in color. You
can view these pages in
color at www.grizzly.com.
Model T33903/T33904 (Mfd. Since 07/23)
-47-
Page 50
Wiring Diagram
Neutral
Hot
120 VAC
Ground
5-15 Plug
Start
Capacitor
CD60
400µF
250VAC
120V MOTOR
Run
Capacitor
CBB60
65µF
300VAC
−+
Laser LED Driver
HOPESTAR
LED-5V700 5V
SWITCH BOX
ON/OFF Switch
DKLD AN17
20A 125V
NL
LED Switch
DKLD AN-18
Laser Switch
DKLD AN-18
Ground
HEADSTOCK
Laser Modules
DKLD LDBXQ03B
LED Driver
(3-5)X1W
LED
XINGZHEN 12V 3W
-48-
READ ELECTRICAL SAFETY
ON PAGE 47!
Model T33903/T33904 (Mfd. Since 07/23)
Page 51
Electrical Component Photos
Figure 67. Switch box wiring.
Figure 69. Capacitor wiring.
Figure 70. LED driver wiring.
Figure 68. LED & laser module wiring.
Model T33903/T33904 (Mfd. Since 07/23)
READ ELECTRICAL SAFETY
ON PAGE 47!
-49-
Page 52
SECTION 9: PARTS
We do our best to stock replacement parts when possible, but we cannot guarantee that all parts shown
are available for purchase. Call (800) 523-4777 or visit www.grizzly.com/parts to check for availability.
T33903 Main
77-14
77-13
77-12
77-11
134
56
77-1
135
57
59
77-7
60
55
61
62
137
77-2
77-6
77-8
136
54
58
63
77-3
36-2
52
77-4
77-5
77
48
64
40
65
36-1
47
51
53
39
38
49
50
12
66
68
69
72
20
37
67
73
74
13
19
21
14
16
17
18
36
44
45
104
43
70
71
46
42
30
22
41
130
129
33
11
31
35
15
32
112
8
10
126
131
5
106-2
127
128
133
27
34
101
106-1
106
105
110
113
6
29
4
9
100
7
102
117
81
28
78
107
115
119
80
96
97
98
111
23
24
99
116
1
2
108
3
25
26
82
79
109
114
118
88
85
94-5
83
89
121
123
95
84
94-6
138
90
87
86
94-1
94-2
94-3
91
92
93
94
94-4
94-7
94-8
120
124
122
125
132
75
76
77-10
-50-
77-9
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Model T33903/T33904 (Mfd. Since 07/23)
Page 53
55 PT33903055 COMPRESSION SPRING 1.2 X 14 X 11.5 94-4 PT33903094-4 CONTACT PLATE 19 X 26MM EXT
T33903 Main Parts List
REF PART # DES CRIPTI ON REF PART # DES CRIPTI ON
1 PT33903001 V-BELT A-700E 56 PT33903056 QUI CK-RELEASE BUTTON
2 PT33903002 MOTOR PULLEY 57 PT33903057 DEPTH SCALE
3 PT33903003 SET SCREW M8-1.25 X 10 58 PT33903058 THREADE D DEP TH ROD
4 PT33903004 BALL BEARING 6202-2RS 59 PT33903059 FLA T HD SCR M6- 1 X 1 2
5 PT33903005 IDLER PULLEY 60 PT33903060 DEPTH STOP BRACKET
6 PT33903006 CRANK SHAFT 61 PT33903061 DEPTH COLLAR
7 PT33903007 BELT COVER 62 PT33903062 HEX NUT M12-1.75
8 PT33903008 KNOB BOLT M5-.8 X 8, D20, ROUND KD 63 PT33903063 HEX NUT M6- 1
9 PT33903009 I NT TOOTH WA SHER 5 MM 64 PT33903064 CAP SCREW M6-1 X 45
10 PT33903010 ACO RN NUT M5- . 8 65 PT33903065 SET SCREW M6-1 X 10
11 PT33903011 SET SCREW M8-1.25 X 16 66 PT33903066 EXT RETAI NI NG RI NG 17 MM
12 PT33903012 V-BELT A-700E 67 PT33903067 SPACER 52 X 70 X 2.5MM RUBBER
13 PT33903013 SPINDLE PULLEY 68 PT33903068 BALL BEARI NG 6203-2RS
14 PT33903014 SPINDLE SLEEVE 69 PT33903069 QUILL
15 PT33903015 KEY 10 X 8 X 35 70 PT33903070 DRIFT KEY
16 PT33903016 BALL BEARING 6205-2RS 71 PT33903071 FOLDING HANDLE M10-1. 5 X 36, 70L
17 PT33903017 SPACER 46 X 52 X 10MM 72 PT33903072 BALL BEARI NG 6007-2RS
18 PT33903018 EX T RETA I NI NG RI NG 25 MM 73 PT33903073 SPINDLE MT#4
19 PT33903019 HEX NUT M5- . 8 74 PT33903074 DRILL CHUCK ARBO R MT#4 X J T3
20 PT33903020 CORD CLAMP LARGE 75 PT33903075 DRILL CHUCK JT3 X 1/8-5/ 8
21 PT33903021 FLA T WAS HER 5MM 76 PT33903076 DRILL CHUCK KEY 5/16" SE 12T SD-11/16"
22 PT33903022 PHLP HD SCR M5-.8 X 16 77 PT33903077 CHUCK GUARD ASSEMBLY
23 PT33903023 TAP SCREW M4.2 X 12 77-1 PT33903077-1 HEX NUT M4 -. 7
24 PT33903024 CORD CLAMP SMALL 77-2 PT33903077-2 CHUCK GUA RD COLL AR
25 PT33903025 HEX BOLT M8-1.25 X 12 77-3 PT33903077-3 HEX NUT M6 -1
26 PT33903026 FLA T WAS HER 8MM 77-4 PT33903077-4 PHLP HD SCR M4-. 7 X 30
27 PT33903027 BUSHI NG RUBBER 77-5 PT33903077-5 TAP SCREW M2.6 X 6
28 PT33903028 FLAT WASHER 9 X 18 X 2.5MM RUBBER 77-6 PT33903077-6 HINGE BRACKET
29 PT33903029 FOLDI NG HANDLE M10-1.5 X 25 DOG-PT, 35L 77-7 PT33903077-7 EXTENSI ON SPRING 0.8 X 6.5 X 30
30 PT33903030 BELT TENSION LEVER 77-8 PT33903077-8 HEX BOLT M5-.8 X 16
31 PT33903031 EX T RETA I NI NG RI NG 15 MM 77-9 PT33903077-9 WI NG NUT M5-. 8
32 PT33903032 SET SCREW M10-1.5 X 12 77-10 PT33903077-10 GUARD LOWER
33 PT33903033 HEA DSTO CK 77-11 PT33903077-11 GUARD UPPER
34 PT33903034 SET SCREW M10-1.5 X 12 77-12 PT33903077-12 PHLP HD SCR M4-. 7 X 35
35 PT33903035 STUD-SE M4-.7 X 8, 13. 5 SLOTTED 77-13 PT33903077-13 HEX BOLT M6-1 X 20
36 PT33903036 RETURN SPRING ASSEMBLY 77-14 PT33903077-14 LOCK NUT M4 -. 7
36-1 PT33903036-1 RETURN SP RI NG COVE R 78 PT33903078 PIVOT PIN 7 X 12, 10.5 X 19MM
36-2 PT33903036-2 FLAT COI L SPRING 79 PT33903079 BELT TENSION BLOCK
37 PT33903037 THUMB NUT M6 -1 K D 80 PT33903080 SET SCREW M8-1.25 X 10
38 PT33903038 FLA T WAS HER 6MM 81 PT33903081 SLIDE BAR LEFT
39 PT33903039 LOCK WASHER 6MM 82 PT33903082 SLIDE BAR RIGHT
40 PT33903040 CAP SCREW M6-1 X 16 83 PT33903083 HEX BOLT M8-1.25 X 25
41 PT33903041 EX T TOO TH WASHE R 5MM 84 PT33903084 FLAT WASHE R 8MM
42 PT33903042 FLA T WAS HER 5MM 85 PT33903085 MOTOR MOUNT
43 PT33903043 LOCK WASHER 5MM 86 PT33903086 HEX NUT M8 -1. 25
44 PT33903044 PHLP HD SCR M5-.8 X 8 87 PT33903087 HEX BOLT M8-1. 25 X 30
45 PT33903045 TRANSFORMER HOPESTAR LED-5V700 5V 88 PT33903088 FLAT WASHE R 12MM
46 PT33903046 PHLP HD SCR M4-.7 X 8 89 PT33903089 LOCK WASHER 12MM
47 PT33903047 LI GHT ON/ O FF SWI TCH DKLD A N-18 RED 90 PT33903090 HEX NUT M12-1.75
48 PT33903048 LASER ON/ OFF SWI TCH DKLD AN-18 BLACK 91 PT33903091 KEY 6 X 6 X 40
49 PT33903049 SWI TCH B OX 92 PT33903092 HEX NUT M8-1 . 2 5
50 PT33903050 CAP SCREW M6-1 X 12 93 PT33903093 FLAT WASHE R 8MM
51 PT33903051 SWI TCH P LATE 94 PT33903094 MOTOR 1-1/4HP 120V 1-PH
52 PT33903052 ON/ O FF SWI TCH DKLD A N17 94-1 PT33903094-1 MOTOR FA N COVE R
53 PT33903053 TAP SCREW M3.5 X 10 94-2 PT33903094-2 MOTOR FA N
54 PT33903054 DEPTH STOP NUT M12-1.75 94-3 PT33903094-3 CENTRI FUGAL SWI TCH 3/ 4 1 700
Model T33903/T33904 (Mfd. Since 07/23)
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-51-
Page 54
114 PT33903114 GEAR SHAFT
T33903 Main Parts List (Cont.)
REF PART # DE S CRIPTI ON REF P ART # DESCRIP TION
94-5 PT33903094-5 S CAPACITOR 400M 250V 1-9/16 X 3-1/8 115 PT33903115 GEAR 14T
94-6 PT33903094-6 J UNCTI ON BO X 116 PT33903116 WORM SHA FT
94-7 PT33903094-7 R CAPACITOR 65M 300V 1-5/8 X 3 117 PT33903117 EXT RE TAI NI NG RI NG 14MM
94-8 PT33903094-8 BALL BEARING 6205-2RS 118 PT33903118 SET SCREW M8-1.25 X 10
95 PT33903095 POWER CORD 16G 3W 70" 5-15P 119 PT33903119 TABLE HEIGHT CRANK
96 PT33903096 ROLL PIN 6 X 20 120 PT33903120 RACK
97 PT33903097 CHUCK KEY SEAT 121 PT33903121 COLUMN
98 PT33903098 FLA T WASHE R 5MM 122 PT33903122 HEX BOLT M10-1.5 X 30
99 PT33903099 PHLP HD SCR M5-.8 X 10 123 PT33903123 SET SCREW M10-1.5 X 8
100 PT33903100 SET SCREW M6-1 X 6 124 PT33903124 COLUMN BASE
101 PT33903101 SET SCREW M10-1.5 X 25 SLOTTED 125 PT33903125 BASE
102 PT33903102 HEX NUT M10-1. 5 126 PT33903126 RI VET 2.5 X 6MM NAMEPLATE, ALUMINUM
104 PT33903104 LASER MODULE DKLD LDBXQ03B 127 PT33903127 TABLE TILT SCALE
105 PT33903105 LIGHT SEAT 128 PT33903128 RI VET 2.5 X 6MM NAMEPLATE, ALUMINUM
106 PT33903106 LED ASSEMBLY 129 PT33903129 POINTER
106-1 PT33903106-1 LED XINGZHEN 12V 3W 130 PT33903130 TABLE
106-2 PT33903106-2 LED DRI VER (3 -5) X1W 131 PT33903131 LOCK WASHER 20MM
107 PT33903107 PI NI ON SHA FT 132 PT33903132 HEX BOLT M20-2.5 X 55
108 PT33903108 KNOB M12-1.75, D45 133 PT33903133 TABLE MOUNTING ARM
109 PT33903109 STUD-DE M12-1.75 X 198, 15 134 PT33903134 HEX WRE NCH 3MM
110 PT33903110 COLUMN COLLAR 135 PT33903135 WRE NCH 30MM CO MBO
111 PT33903111 SET SCREW M6-1 X 10 136 PT33903136 HEX WRE NCH 4MM
112 PT33903112 FOLDING HANDLE M12-1. 75 X 50, 90L 137 PT33903137 HEX WRE NCH 5MM
113 PT33903113 TABLE BRACKET 138 PT33903138 MOTOR CORD 16G 3W 45"
-52-
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Model T33903/T33904 (Mfd. Since 07/23)
Page 55
77-14
77-13
77-12
77-11
55
56
59
77-1
57
60
61
62
77-7
134
54
77-2
52
77-6
133
48
51
58
63
77-3
77-8
47
77-4
77-5
40
53
64
65
136
39
36-2
135
38
36-1
50
T33904 Main
12
42
44
45
130
30
41
105
11
31
33
35
128
15
8
9
10
106-1
106-2
112
126
127
6
7
43
27
32
34
100
101
102
106
129
37
49
68
72
73
13
14
16
17
18
19
20
21
22
36
43
46
66
67
104
69
70
71
4
5
23
78
96
108
111
116
117
28
97
110
113
80
29
98
115
2
24
99
1
81
109
114
3
25
26
119
79
107
118
85
82
137
88
83
94-5
121
123
89
84
94-6
90
86
94-1
94-2
94-3
87
94-7
95
91
92
93
94
94-4
94-8
120
122
74
77-10
77-9
75
77
Model T33903/T33904 (Mfd. Since 07/23)
76
132
131
BUY PARTS ONLI NE AT GRIZZLY.COM!
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124
125
-53-
Page 56
55 PT33904055 COMPRESSION SPRING 1.2 X 14 X 11.5 94-4 PT33904094-4 CONTACT PLATE 19 X 26MM EXT
T33904 Main Parts List
REF PART # DESCRI PTIO N REF PART # DES CRIP TI ON
1 PT33904001 V-BELT A-787 56 PT33904056 QUICK-RELEASE BUTTON
2 PT33904002 MOTOR PULLEY 57 PT33904057 DEPTH SCALE
3 PT33904003 SET SCREW M8-1.25 X 10 58 PT33904058 THREADE D DEPTH RO D
4 PT33904004 BALL BEARING 6202-2RS 59 PT33904059 FLA T HD SCR M6- 1 X 1 2
5 PT33904005 IDLER PULLEY 60 PT33904060 DEPTH STOP BRACKET
6 PT33904006 CRANKS HAFT 61 PT33904061 DEPTH COLLAR
7 PT33904007 BELT COVER 62 PT33904062 HEX NUT M12-1.75
8 PT33904008 KNOB BOLT M5-. 8 X 8, D20, ROUND KD 63 PT33904063 HEX NUT M6-1
9 PT33904009 I NT TO OTH WAS HER 5MM 64 PT33904064 CAP SCREW M6-1 X 45
10 PT33904010 ACORN NUT M5 -. 8 65 PT33904065 SET SCREW M6-1 X 10
11 PT33904011 SET SCREW M8-1.25 X 16 66 PT33904066 EXT RETAI NING RI NG 25MM
12 PT33904012 V-BELT A-686 67 PT33904067 SPACER 62 X 80 X 2.5MM RUBBER
13 PT33904013 SPINDLE PULLEY 68 PT33904068 BALL BEARI NG 6005-2RS
14 PT33904014 SPINDLE SLEEVE 69 PT33904069 QUILL
15 PT33904015 KEY 10 X 5 X 35 70 PT33904070 DRIFT KEY
16 PT33904016 BALL BEARING 6007-2RS 71 PT33904071 THRUST B EARI NG 51 107
17 PT33904017 SPACER 56 X 62 X 10MM 72 PT33904072 BALL BEARING 6007-2RS
18 PT33904018 EXT RE TAI NI NG RI NG 35 MM 73 PT33904073 SPI NDLE MT#4
19 PT33904019 HEX NUT M5 -. 8 74 PT33904074 DRIL L CHUCK A RBOR MT# 4 X J T3
20 PT33904020 CORD CLAMP LARGE 75 PT33904075 DRILL CHUCK JT3 X 1/8-5/8
21 PT33904021 FLAT WA SHER 5 MM 76 PT33904076 DRI LL CHUCK KEY 5/16" SE 12T SD-11/16"
22 PT33904022 PHLP HD SCR M5-. 8 X 16 77 PT33904077 CHUCK GUARD ASSEMBLY
23 PT33904023 TAP SCREW M4.2 X 12 77-1 PT33904077-1 HEX NUT M4 -. 7
24 PT33904024 CORD CLAMP SMALL 77-2 PT33904077-2 CHUCK G UARD COL LA R
25 PT33904025 HEX BOLT M8-1.25 X 12 77-3 PT33904077-3 HE X NUT M6- 1
26 PT33904026 FLAT WA SHER 8 MM 77-4 PT33904077-4 PHLP HD SCR M4-. 7 X 30
27 PT33904027 BUSHING RUBBER 77-5 PT33904077-5 TAP SCREW M2.6 X 6
28 PT33904028 FLAT WASHER 9 X 18 X 2.5MM RUBBER 77-6 PT33904077-6 HINGE BRACKET
29 PT33904029 FOLDING HANDLE M10-1. 5 X 25 DOG-PT, 35L 77-7 PT33904077-7 EXTENSI ON SPRING 0.8 X 6.5 X 30
30 PT33904030 BELT TENSION LEVER 77-8 PT33904077-8 HEX BOLT M5-.8 X 16
31 PT33904031 EXT RE TAI NI NG RI NG 15 MM 77-9 PT33904077-9 WING NUT M5 -. 8
32 PT33904032 SET SCREW M10-1.5 X 12 77-10 PT33904077-10 GUARD LOWER
33 PT33904033 HEADS TOCK 77-11 PT33904077-11 GUARD UPPER
34 PT33904034 SET SCREW M10-1.5 X 12 77-12 PT33904077-12 PHLP HD SCR M4-. 7 X 35
35 PT33904035 STUD-SE M4-.7 X 8, 13.5 SLOTTED 77-13 PT33904077-13 HEX BOLT M6-1 X 20
36 PT33904036 RETURN SPRI NG ASSEMBLY 77-14 PT33904077-14 LOCK NUT M4-. 7
36-1 PT33904036-1 RETURN SPRI NG COV ER 78 PT33904078 PIVOT PIN 7 X 12, 10.5 X 19MM
36-2 PT33904036-2 FLAT COIL SPRING 79 PT33904079 BELT TENSION BLOCK
37 PT33904037 THUMB NUT M6- 1 KD 80 PT33904080 SET SCREW M8-1.25 X 10
38 PT33904038 FLAT WA SHER 6 MM 81 PT33904081 SLIDE BAR LEFT
39 PT33904039 LOCK WASHER 6MM 82 PT33904082 SLIDE BAR RI GHT
40 PT33904040 CAP SCREW M6-1 X 16 83 PT33904083 HEX BOLT M8-1.25 X 25
41 PT33904041 EXT TO OTH WAS HER 5MM 84 PT33904084 FLAT WASHE R 8MM
42 PT33904042 FLAT WA SHER 5 MM 85 PT33904085 MOTO R MOUNT
43 PT33904043 LOCK WASHER 5MM 86 PT33904086 HEX NUT M8-1. 25
44 PT33904044 PHLP HD SCR M5-. 8 X 8 87 PT33904087 HEX BOLT M8-1.25 X 30
45 PT33904045 TRANSFORMER HOPESTAR LED-5V700 5V 88 PT33904088 FLAT WASHE R 12MM
46 PT33904046 PHLP HD SCR M4-. 7 X 8 89 PT33904089 LOCK WASHER 12MM
47 PT33904047 LI GHT ON/ OFF SWI TCH DKLD A N-18 RED 90 PT33904090 HEX NUT M12-1.75
48 PT33904048 LASER ON/OFF SWITCH DKLD AN-18 BLACK 91 PT33904091 KEY 6 X 6 X 40
49 PT33904049 SWI TCH BOX 92 PT33904092 HEX NUT M8- 1. 25
50 PT33904050 CAP SCREW M6-1 X 12 93 PT33904093 FLAT WA SHE R 8MM
51 PT33904051 SWI TCH PLA TE 94 PT33904094 MOTOR 1-1/4HP 120V 1-PH
52 PT33904052 ON/ OFF SWI TCH DKLD A N17 94-1 PT33904094-1 MOTO R FAN COV ER
53 PT33904053 TAP SCREW M3.5 X 10 94-2 PT33904094-2 MOTOR FA N
54 PT33904054 DEPTH STOP NUT M12-1.75 94-3 PT33904094-3 CENTRI FUGAL SWI TCH 3/ 4 17 00
-54-
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Model T33903/T33904 (Mfd. Since 07/23)
Page 57
REF PART # DE SCRIP TI ON RE F PART # DESCRI PTION
T33904 Main Parts List (Cont.)
94-5 PT33904094-5 S CAPACI TOR 400M 250V 1-9/16 X 3-1/8 114 PT33904114 GEAR SHAFT
94-6 PT33904094-6 J UNCTI O N BOX 115 PT33904115 GEAR 14T
94-7 PT33904094-7 R CAPACITOR 65M 300V 1-5/ 8 X 3 116 PT33904116 WORM SHAFT
94-8 PT33904094-8 BALL BEARING 6205-2RS 117 PT33904117 EX T RETAI NING RI NG 14MM
95 PT33904095 POWER CORD 16G 3W 70" 5-15P 118 PT33904118 SET SCREW M8-1.25 X 10
96 PT33904096 ROLL PIN 6 X 20 119 PT33904119 TABLE HEI GHT CRANK
97 PT33904097 CHUCK KEY SEAT 120 PT33904120 RACK
98 PT33904098 FLAT WAS HER 5MM 121 PT33904121 COLUMN
99 PT33904099 PHLP HD SCR M5-.8 X 10 122 PT33904122 HEX BOLT M10-1.5 X 30
100 PT33904100 SET SCREW M6-1 X 6 123 PT33904123 SET SCREW M10-1.5 X 8
101 PT33904101 SET SCREW M10-1.5 X 25 SLOTTED 124 PT33904124 COLUMN BASE
102 PT33904102 HEX NUT M1 0-1 . 5 125 PT33904125 BASE
104 PT33904104 LASER MODULE DKLD LDBXQ03B 126 PT33904126 RIVET 2.5 X 6MM NAMEPLATE, ALUMINUM
105 PT33904105 LIGHT SEAT 127 PT33904127 TABLE TILT SCALE
106 PT33904106 LED ASSEMBLY 128 PT33904128 RIVET 2.5 X 6MM NAMEPLATE, ALUMINUM
106-1 PT33904106-1 LED XINGZHEN 12V 3W 129 PT33904129 POINTER
106-2 PT33904106-2 LED DRIVER (3-5)X1W 130 PT33904130 TABLE
107 PT33904107 PI NI O N SHAFT 131 PT33904131 LOCK WASHER 20MM
108 PT33904108 KNOB M12-1.75, D45 132 PT33904132 HEX BOLT M20-2.5 X 55
109 PT33904109 STUD-DE M12-1.75 X 218, 15 133 PT33904133 HEX WRE NCH 3MM
110 PT33904110 COLUMN COLLAR 134 PT33904134 WRENCH 30MM COMBO
111 PT33904111 SET SCREW M6-1 X 10 135 PT33904135 HEX WRE NCH 4MM
112 PT33904112 FOLDING HANDLE M12-1.75 X 50, 90L 136 PT33904136 HEX WRENCH 5MM
113 PT33904113 TABLE BRACKET 137 PT33904137 MOTOR CORD 16G 3W 45"
Model T33903/T33904 (Mfd. Since 07/23)
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-55-
Page 58
201
204
Labels & Cosmetics
205 PT33903205 MACHINE ID LABEL (T33903)
203
206
CAUTION!
LASER RADIATION!
Do not stare into beam.
Class: II
Wavelength: 650nm
Max. Output: 1m W
To reduce risk of death
or serious injury, read
manual BEFORE using
machine.
To get a new manual, call
(800) 523-4777 or go to
www.grizzly.com.
WARNING!
WARNING!
EYE/FACE INJURY
HAZARD!
Always wear
ANSI-approved safety
glasses and face
shield when using this
machine.
WARNING!
INJURY/SHOCK
HAZARD!
Disconnect power
before adjustments,
maintenance, or
service.
203
202
Specifications
Motor: 1-1/4 HP, 120V, 1-Phase, 60 Hz
Full-Load Current Rating: 13A
Max. Distance Spindle to Table: 27"
Distance From Spindle to Base: 44-1/4"
Spindle Speeds: 12 (210–3020 RPM)
Spindle Travel: 4-3/4"
Spindle Taper: MT#4
Weight: 223 lbs.
Date
S/N
Mfd. for Grizzly in China
Specifications
Motor: 1-1/4 HP, 120V, 1-Phase, 60 Hz
Full-Load Current Rating: 13A
Max. Distance Spindle to Table: 28-5/8"
Max. Distance Spindle to Base: 47-1/8"
Spindle Speeds: 12 (210–3020 RPM)
Spindle Travel: 4-1/2"
Spindle Taper: MT#4
Weight: 235 lbs.
Date
S/N
Mfd. for Grizzly in China
205
MODEL T33903
17" FLOOR DRILL PRESS
w/LED LIGHT & LASER GUIDE
WARNING!
To reduce risk of serious personal injury when using this machine:
1. Read and understand owner’s manual before operating.
2. Always wear approved safety glasses and a face shield.
3. Only plug power cord into a grounded outlet.
4. Disconnect power before setting up or servicing.
5. Avoid spindle entanglement. Tie back long hair, roll up long
sleeves, and DO NOT wear loose clothing, gloves, or jewelry.
6. Keep all guards and covers in place during operation.
7. Clamp workpiece to table to prevent rotation.
8. Avoid putting hands where they could slip into rotating bits.
9. Always remove chuck keys and other tools before starting.
10. Use correct speeds for drill bits and workpiece material.
11. DO NOT expose to rain or use in wet locations.
12. Prevent unauthorized use by children or untrained users.
MODEL T33904
20" FLOOR DRILL PRESS
w/LED LIGHT & LASER GUIDE
WARNING!
To reduce risk of serious personal injury when using this machine:
1. Read and understand owner’s manual before operating.
2. Always wear approved safety glasses and a face shield.
3. Only plug power cord into a grounded outlet.
4. Disconnect power before setting up or servicing.
5. Avoid spindle entanglement. Tie back long hair, roll up long
sleeves, and DO NOT wear loose clothing, gloves, or jewelry.
6. Keep all guards and covers in place during operation.
7. Clamp workpiece to table to prevent rotation.
8. Avoid putting hands where they could slip into rotating bits.
9. Always remove chuck keys and other tools before starting.
10. Use correct speeds for drill bits and workpiece material.
11. DO NOT expose to rain or use in wet locations.
12. Prevent unauthorized use by children or untrained users.
WARNING!
ENTANGLEMENT
HAZARD!
Always keep this
cover closed during
operation.
WARNING!
ENTANGLEMENT
HAZARD!
Tie back long hair, roll up
long sleeves, and remove
loose clothing, jewelry, or
gloves to prevent getting
caught in moving parts.
CAUTION!
LASER RADIATION!
Do not stare into beam.
Class: II
Wavelength: 650nm
Max. Output: 1m W
206
208
207
REF PART # DESCRI P TION REF P ART # DESCRIP TION
201 PT33903201 COMBO WARNING LABEL 205 PT33904205 MACHINE ID LABEL (T33904)
202 PT33903202 GRIZZLY LOGO LABEL 206 PT33903206 LASER LABEL
203 PT33903203 ELECTRICITY LABEL 207 PT33903207 TOUCH-UP PAI NT, GRIZZLY BLACK
204 PT33903204 ENTANGLEMENT HAZARD LABEL 208 PT33903208 TOUCH-UP PAINT, GRIZZLY GREEN
Safety labels help reduce the risk of serious injury caused by machine hazards. If any label comes
off or becomes unreadable, the owner of this machine MUST replace it in the original location
before resuming operations. For replacements, contact (800) 523-4777 or www.grizzly.com.
-56-
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Model T33903/T33904 (Mfd. Since 07/23)
Page 59
WARRANTY & RETURNS
Grizzly Industrial, Inc. warrants every product it sells for a period of 1 year to the original purchaser from
the date of purchase. This warranty does not apply to defects due directly or indirectly to misuse, abuse,
negligence,accidents,repairsoralterationsorlackofmaintenance.ThisisGrizzly’ssolewrittenwarranty
and any and all warranties that may be implied by law, including any merchantability or fitness, for any particular purpose, are hereby limited to the duration of this written warranty. We do not warrant or represent
that the merchandise complies with the provisions of any law or acts unless the manufacturer so warrants.
InnoeventshallGrizzly’sliabilityunderthiswarrantyexceedthepurchasepricepaidfortheproductand
any legal actions brought against Grizzly shall be tried in the State of Washington, County of Whatcom.
We shall in no event be liable for death, injuries to persons or property or for incidental, contingent, special,
or consequential damages arising from the use of our products.
The manufacturers reserve the right to change specifications at any time because they constantly strive to
achieve better quality equipment. We make every effort to ensure that our products meet high quality and
durability standards and we hope you never need to use this warranty.
In the event you need to use this warranty, contact us by mail or phone and give us all the details. We will
thenissue youa “ReturnNumber,’’which mustbeclearly postedonthe outsideas wellas theinsideof
the carton. We will not accept any item back without this number. Proof of purchase must accompany the
merchandise.
Please feel free to write or call us if you have any questions about the machine or the manual.
Thank you again for your business and continued support. We hope to serve you again soon.
For further information about the
scan the QR
code below
to be automatically directed to our warranty page.
warranty, visit https://www.grizzly.com/forms/warranty or
WARRANTY
Page 60
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