Grizzly T21320 User Manual

MODEL T21320

12" COMBINATION 3-IN-1

SHEET METAL MACHINE

OWNER'S MANUAL

(FOR MACHINES MANUFACTURED FROM 2/09 AND LATER)

COPYRIGHT © FEBRUARY, 2009 BY GRIZZLY INDUSTRIAL, INC.

WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE

OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.

#TS11607 PRINTED IN CHINA

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.

Table of Contents

INTRODUCTION ............................................................................................................................... 2

Manual Accuracy ........................................................................................................................ 2

Contact Info ................................................................................................................................ 2

Machine Description ................................................................................................................... 2

Identification ............................................................................................................................... 3

Machine Data Sheet ................................................................................................................... 4

SECTION 1: SAFETY ....................................................................................................................... 5

Safety Instructions for Machinery ............................................................................................... 5

Additional Safety Instructions for Combination 3-in-1 Sheet Metal Machines ........................... 7

SECTION 2: SETUP ......................................................................................................................... 8

Needed for Setup ....................................................................................................................... 8

Unpacking .................................................................................................................................. 8

Inventory ..................................................................................................................................... 9

Clean Up .................................................................................................................................... 9

Site Considerations .................................................................................................................. 10

Mounting ................................................................................................................................... 10

Assembly .................................................................................................................................. 11

SECTION 3: OPERATIONS ........................................................................................................... 14

Slip Roll Overview .................................................................................................................... 14

Slip Roll Tips ............................................................................................................................ 15

Flat Rolling ............................................................................................................................... 15

Creating Curves ....................................................................................................................... 16

Creating Cylinders .................................................................................................................... 18

Removing Workpiece From Rollers ......................................................................................... 20

Bending Wire ............................................................................................................................ 21

Brake Overview ........................................................................................................................ 22

Bend Allowance........................................................................................................................ 22

Bending Sheet Metal ................................................................................................................ 23

Shearing Overview ................................................................................................................... 24

Cutting Sheet Metal .................................................................................................................. 24

Material Thickness ................................................................................................................... 25

SECTION 4: ACCESSORIES ......................................................................................................... 26

SECTION 5: MAINTENANCE......................................................................................................... 28

Schedule .................................................................................................................................. 28

Cleaning & Protecting .............................................................................................................. 28

Lubrication ................................................................................................................................ 28

SECTION 6: SERVICE ................................................................................................................... 30

Troubleshooting ........................................................................................................................ 30

Shearing Blade Reversal/Replacement ................................................................................... 31

Shearing Blade Gap Adjustment .............................................................................................. 32

Brake Alignment ....................................................................................................................... 34

SECTION 7: PARTS ....................................................................................................................... 35

Main .......................................................................................................................................... 35

Label Placement....................................................................................................................... 37

WARRANTY AND RETURNS ........................................................................................................ 41

INTRODUCTION

Manual Accuracy

We are proud to offer this manual with your new
machine! We've made every effort to be exact
with the instructions, specifications, drawings, and
photographs of the machine we used when writ­ing this manual. However, sometimes errors do
happen and we apologize for them.

Also, owing to our policy of continuous improve­ment, your machine may not exactly match the
manual. If you find this to be the case, and the dif­ference between the manual and machine leaves
you in doubt, check our website for the latest
manual update or call technical support for help.

Before calling, find the manufacture date of your
machine by looking at the date stamped into the
machine ID label (see below). This will help us
determine if the manual version you received
matches the manufacture date of your machine.

Contact Info

We stand behind our machines. If you have any
service questions, parts requests or general ques­tions about the machine, please call or write us at
the location listed below.

Grizzly Industrial, Inc.

1203 Lycoming Mall Circle

Muncy, PA 17756

Phone: [phone]

Fax: [phone]

E-Mail: [e-mail]

If you have any comments regarding this manual,
please write to us at the address below:

C

/O Technical Documentation Manager

Grizzly Industrial, Inc.

P.O. Box 2069

Bellingham, WA 98227-2069

Email: [e-mail]

Manufacture Date

of Your Machine

For your convenience, we post all available man­uals and manual updates for free on our website
at www.grizzly.com. Any updates to your model
of machine will be reflected in these documents
as soon as they are complete.

Machine Description

The Model T21320 is a sheet metal machine
designed to bend and cut sheet metal up to 22
gauge in thickness and 12" in width.

The slip rollers are used to flatten or form cylin­ders, cones, and arcs in sheet metal. The brake
portion of the machine is designed to create
bends up to 90° and to fold sheet metal into
boxes, pans, or trays. With the use of the hand
crank, the upper shear blade moves down past
the fixed table blade, from left to right, to shear the
workpiece that is supported on the table.

-2-

Model T21320 (Mfg. 2/09 and Later)

Identification

Slip Rollers

Brake Fingers

Shear

Holddown

Bar

Slip Roll Thickness

Adjustment Leaf Bolts

Slip Roll Cover

Hand Crank

Slip Roll

Diameter

Adjustment

Knob

Brake Finger

Receiver

& Upper Shear

Blade

Brake & Shear

Adjustable

Shearing Table

Workbench

Mounting

Locations

Figure 1. Model T21320 identification.

Work Stop

NOTICE

If you have never used this type of machine or equipment before, WE STRONGLY RECOMMEND
that you read books, review industry trade 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.

Model T21320 (Mfg. 2/09 and Later)

-3-

Machine Data Sheet

mACHINe dATA

SHeeT

Customer Service #: [phone] • To Order Call: [phone] • Fax #: [phone]

model T21320 12" ComBINATIoN

3-IN-1 SHeeT meTA l mACHINe

Product Dimensions:

Weight ............................................................................................................................................................................ 95 Lbs.

Width/Depth/Height ......................................................................................................................................... 24" x 23" x 15

Footprint (Width/Depth) .......................................................................................................................................... 14

Shipping Dimensions:

Type ...................................................................................................................................................................................Crate

Content .......................................................................................................................................................................... Machine

Weight ........................................................................................................................................................................... 100 Lbs.

Length/Width/Height ............................................................................................................................................ 23" x 13" x 17"

Capacities:

Maximum Workpiece Width .................................................................................................................................................. 12"

Maximum Workpiece Thickness ......................................................................................................................................22 Ga.

Pan/Box Brake Minimum Reverse Bend ................................................................................................................................

Pan/Box Brake Maximum Side Height @ 90° ........................................................................................................................ 2"

Slip Roll Minimum Cylinder Diameter .................................................................................................................................. 1

Slip Roll Wire Sizes................................................................................................... ..........................................

Pan/Box Maximum Side Height .............................................................................................................................................. 2"

Construction

Brake ................................................................................................................................................... Steel w/ Hardened Edge

Frame ........................................................................................................................................................................... Cast Iron

Base ............................................................................................................................................................................. Cast Iron

Shear Table .................................................................................................................................... Precision Ground Cast Iron

Shear Blades ......................................................................................................Reversible Precision Ground Hardened Steel

Shear Hold-Down Clamp .............................................................................................................................................Cast-Iron

Other Specifications:

Country Of Origin .............................................................................................................................................................. China

Warranty ........................................................................................................................................................................... 1 Year

Serial Number Location ................................................................................................................. ID Label on Top of Machine

Assembly Time ......................................................................................................................................................... 30 Minutes

Features:

Shear Table Front Guide
Shear & Brake Adjustable Rear Stop
Hardened Steel Brake Fingers
Precision Ground Hardened Steel Shear Blade

1

⁄8" x 11 1⁄2"

1

⁄8", 11⁄64", 13⁄64"

3

⁄8"

3

⁄4"

1

⁄2"

-4-

data sheet

Model T21320 (Mfg. 2/09 and Later)

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.

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.

This symbol is used to alert the user to useful information about

NOTICE

proper operation of the machine.

Safety Instructions for Machinery

Safety Instructions for Machinery

OWNER’S MANUAL. Read and understand

this owner’s manual BEFORE using machine.
Untrained users can be seriously hurt.

EYE PROTECTION. Always wear ANSI­approved 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.

HAZARDOUS DUST. Dust created while using
machinery may cause cancer, birth defects,
or long-term respiratory damage. Be aware of
dust hazards associated with each workpiece
material, and always wear a NIOSH-approved
respirator to reduce your risk.

WEARING PROPER APPAREL. Do not wear
clothing, apparel, or jewelry that can become
entangled in moving parts. Always tie back or
cover long hair. Wear non-slip footwear to avoid
accidental slips which could cause a loss of
workpiece control.

HEARING PROTECTION. Always wear hear­ing protection when operating or observiing loud
machinery. Extended exposure to this noise
without hearing protection can cause permanent
hearing loss.

MENTAL ALERTNESS. Be mentally alert when
running machinery. Never operate under the
influence of drugs or alcohol, when tired, or when
distracted.

Model T21320 (Mfg. 2/09 and Later)

-5-

Safety Instructions for Machinery

DISCONNECTING POWER SUPPLY. Always

disconnect machine from power supply before
servicing, adjusting, or changing cutting tools
(bits, blades, cutters, etc.). Make sure switch is
in OFF position before reconnecting to avoid an
unexpected or unintentional start.

INTENDED USE. Only use the machine for its
intended purpose and only use recommended
accessories. Never stand on machine, modify
it for an alternative use, or outfit it with non­approved accessories.

STABLE MACHINE. Unexpected movement
during operations greatly increases the risk of
injury and loss of control. Verify machines are
stable/secure and mobile bases (if used) are
locked before starting.

FORCING MACHINERY. Do not force machine.
It will do the job safer and better at the rate for
which it was designed.

GUARDS & COVERS. Guards and covers can
protect you from accidental contact with mov­ing parts or flying debris. Make sure they are
properly installed, undamaged, and working
correctly before using machine.

REMOVING TOOLS. Never leave adjustment
tools, chuck keys, wrenches, etc. in or on
machine—especially near moving parts. Verify
removal before starting!

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.

DANGEROUS ENVIRONMENTS. Do not use
machinery in wet locations, cluttered areas,
around flammables, or in poorly-lit areas. Keep
work area clean, dry, and well lighted to mini­mize risk of injury.

APPROVED OPERATION. Untrained operators
can be seriously hurt by machinery. Only allow
trained or properly supervised people to use
machine. When machine is not being used, dis­connect power, remove switch keys, or lock-out
machine to prevent unauthorized use—especially
around children. Make workshop kid proof!

CHILDREN & BYSTANDERS. Keep children
and bystanders a safe distance away from work
area. Stop using machine if children or bystand­ers become a distraction.

FEED DIRECTION. Unless otherwise noted, feed
work against the rotation of blades or cutters.
Feeding in the same direction of rotation may pull
your hand into the cut.

SECURING WORKPIECE. When required, use
clamps or vises to secure workpiece. A secured
workpiece protects hands and frees both of them
to operate the machine.

UNATTENDED OPERATION. Never leave
machine running while unattended. Turn machine
Off and ensure all moving parts completely stop
before walking away.

MAINTENANCE & INSPECTION. A machine that
is not properly maintained may operate unpre­dictably. Follow all maintenance instructions and
lubrication schedules to keep machine in good
working condition. Regularly inspect machine for
loose bolts, alignment of critical parts, binding, or
any other conditions that may affect safe opera­tion. Always repair or replace damaged or mis­adjusted parts before operating machine.

EXPERIENCING DIFFICULTIES. If at any time
you are experiencing difficulties performing the
intended operation, stop using the machine!
Contact our Technical Support Department at
[phone].

-6-

Model T21320 (Mfg. 2/09 and Later)

Additional Safety Instructions for

Combination 3-in-1 Sheet Metal Machines

1. OVERLOADING. Attempting to overload

this machine beyond the capacities speci­fied in the Data Sheet on Page 4 could
cause personal injury or property damage.
DO NOT use any sort of "cheater" bar or
pipe on the hand crank.

2. USAGE. To avoid personal injury or prop­erty damage, always use each tool of the
machine for its intended purposes and DO
NOT modify the machine in any way.

3. METAL EDGES. Sharp metal edges can
quickly cut your fingers. ALWAYS chamfer
and de-burr sharp sheet metal edges before
bending and after cutting the workpiece.

4. PINCHING. This machine represents severe
pinching and amputation hazards. ALWAYS
keep hands away from the rollers, brake
fingers, clamping bar, and shearing blades
when operating.

5. PERSONAL PROTECTION. To avoid per­sonal injury, ALWAYS wear heavy leather
gloves, ANSI approved eye protection, and
leather boots with extra toe protection when
using this machine.

6. BODY POSITION. To avoid personal injury
due to slipping or falling, ALWAYS maintain
secure footing and a comfortable body posi­tion when using this machine.

7. GOOD WORKING CONDITION. To reduce
the risk of personal injury, ALWAYS inspect
the working parts of this machine for cracks,
burrs, loose fasteners, or any other dam­age and resolve any issue before beginning
operation.

8. WORKBENCH MOUNTING. Personal injury
could occur if this machine should unexpect­edly move during operation. ALWAYS make
sure the machine is securely mounted to a
stable workbench or stand that can support
the weight and pressures of the operation.

9. ENTANGLEMENT HAZARDS. The moving
parts of this machine represent entangle­ment hazards. DO NOT wear jewelry, or
loose clothing, and tie back long hair when
using this machine.

10. SHEARING BLADES/BRAKE FINGERS.

If not properly aligned, the shearing blades
or brake fingers can cause machine parts
or the workpiece to break up and fly at the
operator. ALWAYS keep these parts proper­ly adjusted and in good working condition.

11. OPERATIONAL QUESTIONS. If, at any
time, you are experiencing difficulties per­forming the intended operation, stop using
the machine! Then contact our Tech Support
at [phone].

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.

Model T21320 (Mfg. 2/09 and Later)

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.

-7-

SECTION 2: SETUP

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!

This machine and its
components are heavy.
Get lifting help and use
safe lifting methods to lift
and move heavy items.

Description Qty

• Safety Glasses ........................................... 1

• Cleaner/Degreaser (Page 9) ...... As Needed

• Disposable Shop Rags ............... As Needed

• Additional People ....................................... 1

• Standard Screwdriver #2 ............................ 1

• Wrench 14mm ............................................ 1

• Mounting Hardware (Page 10) ... As Needed

Unpacking

Your machine was carefully packaged for safe
transportation. Remove the packaging materials
from around your machine and inspect it. If you
discover the machine is damaged, please imme-

diately call Customer Service at [phone]
for advice.

Save the containers and all packing materials for
possible inspection by the carrier or its agent.

Otherwise, filing a freight claim can be difficult.

-8-

When you are completely satisfied with the condi­tion of your shipment, inventory the contents.

SUFFOCATION HAZARD!
Immediately discard all plas­tic bags and packing materi­als to eliminate choking/suf­focation hazards for children
and animals.

Model T21320 (Mfg. 2/09 and Later)

Inventory

Clean Up

The following is a description of the main compo­nents shipped with your machine. Lay the compo­nents out to inventory them.

Note: If you can't find an item on this list, check
the mounting location on the machine or examine
the packaging materials carefully. Occasionally
we pre-install certain components for shipping
purposes.

Inventory: (Figure 2–3) Qty

A. Sheet Metal Machine ................................. 1

B. Shear & Brake Rear Work Stop ................. 1

C. Crank Handle ............................................. 1

D. Crank Handle Lock Knobs ......................... 2

E. Hex Wrenches 5, 6mm ...................... 1 Each

A

The unpainted surfaces are coated with a waxy
oil to prevent corrosion during shipment. Remove
this protective coating with a solvent cleaner or
degreaser, such as shown in Figure 4. For thor­ough cleaning, some parts must be removed.

For optimum performance, clean all moving
parts or sliding contact surfaces. Avoid chlo-

rine-based solvents, such as acetone or brake
parts cleaner that may damage painted surfac­es. Always follow the manufacturer’s instructions
when using any type of cleaning product.

Gasoline and petroleum
products have low flash
points and can explode
or cause fire if used to
clean machinery. DO
NOT use these products
to clean the machinery.

Figure 2. Model T21320 base machine.

C

B

D

E

Figure 3. Model T21320 small item inventory.

Many cleaning solvents
are toxic if inhaled.
Minimize your risk by only
using these products in a
well ventilated area.

G2544—Solvent Cleaner & Degreaser
H9692—Orange Power Degreaser

Great products for removing shipping grease.

Figure 4. Cleaner/degreasers available from

Grizzly.

Model T21320 (Mfg. 2/09 and Later)

-9-

Site Considerations

Mounting

Floor Load

Refer to the Machine Data Sheet for the weight
and footprint specifications of your machine. Some
workbenches or stands may require additional
reinforcement to support the machine, workpiece,
and the forces applied during operation.

Placement Location

Consider existing and anticipated needs, size of
material to be processed through each machine,
and space for auxiliary stands, work tables or
other machinery when establishing a location for
your new machine. See Figure 5 for the minimum
working clearances.

21"

The base of this machine has holes that allow it
to be mounted to a workbench. For a safe and
smooth operation of this machine, it MUST be
securely mounted to an appropriate workbench
or stand.

The strongest mounting option is a "Through
Mount" where holes are drilled all the way through
the workbench, and hex bolts, washers, and hex
nuts are used to secure the drill press to the
workbench.

24"

Figure 5. Minimum working clearances.

Children and visitors may be
seriously injured if unsuper­vised around this machine.
Lock entrances to the shop
or disable start switch or
power connection to prevent
unsupervised use.

Figure 6. Example of a through mount setup.

Another option for mounting is a "Direct Mount"
where the machine is simply secured to the work­bench with a lag screw.

Lag Screw

Flat Washer

Machine Base

Workbench

Figure 7. Example of a direct mount setup.

-10 -

Model T21320 (Mfg. 2/09 and Later)

Assembly

In addition to the assembly procedures below,
some disassembly is required to remove storage
grease and relubricate the cleaned parts.

To assemble and clean your machine:

1. Remove one of the cap screws on the hand

crank hub, rotate the end cap out of the way,
then insert the hand crank in the slot (see
Figure 8).

Note: It is your preference which side of the

machine you install the hand crank.

Hand Crank

3. Thread the rods into either the upper or lower
mounting holes, as shown in Figure 9. Only
hand-tighten the rods—over-tightening will
make it difficult to remove them.

Note: Install the rods in the upper mounting

holes to use the work stop with the brake or
in the lower holes to use it with the shear.

Upper Mounting Holes

Lower

Mounting

Holes

Rods

Cap Screw

Lock Knob

End Cap

Figure 8. Hand crank installed.

2. Re-install the cap screw removed in Step 1,

then thread and tighten a lock knob into the
center hole of the end cap to secure the hand
crank in place.

Tip: When needed, extend one end of the

hand crank from the hub for greater lever­age.

Figure 9. Work stop rods mounted in the lower

holes for use with the shear.

4. Remove the hex nuts from the ends of the
rods, slide the stop bar onto the rods and
position it for your operation, then tighten the
lock knobs to secure it, as shown in Figure

10.

Note: Re-installing the hex nuts is optional.

Lock Knobs

Model T21320 (Mfg. 2/09 and Later)

Stop Bar

Figure 10. Work stop installed for use with the

shear.

-11-

cleaning fingers

5. Loosen the two hex bolts securing the finger
receiver/upper shear blade to the frame (see
Figure 11).

Hex Bolts

Finger Receiver/

Shear Blade

Figure 11. Loosening the hex bolts securing the

finger receiver.

6. Move the table back until the upper shear
blade can pass down behind the table blade
by loosening the two cap screws securing the
shear table to the frame and rotating the table
adjustment screws counterclockwise (see
Figure 57).

Note: Operational adjustment of the shear-

ing blades is covered in the Shearing Blade
Gap Adjustment procedure on Page 32.

8. Use the hand crank to position the brake
finger receiver close to the brake fingers, as
shown in Figure 13.

Gib

Cap

Screws

Fingers

Finger

Removal

Receiver

Path

Figure 13. Brake finger components.

9. Loosen the gib cap screws to release the fin-

gers, then remove the fingers from the side of
the finger receiver, as shown in Figure 13.

10. Use shop rags and a degreaser (Page 9) to
remove the storage grease from the fingers,
gib, and receiver. Thoroughly dry the parts,
then apply a thin coat of an anti-rust lubricant
to all the parts (refer to Accessories on Page
26 for options from Grizzly).

Cap Screw

Upper
Shear

Blade

Table Adjustment Screw

Figure 12. Table adjustment controls.

7. Make sure the finger receiver and upper

shear blade move up and down smoothly, re­tighten the hex bolts just until they are snug,

1

then back them off approximately

⁄4 turn.

-12-

Model T21320 (Mfg. 2/09 and Later)

11. Place a thin piece of wood on the finger
receiver, as shown in Figure 14, then re­install the fingers so that they rest on the
wood piece. Make sure the tops of the fingers
are between the gib and the casting.

Note: Install the widest finger to the right,

then repeat with each smaller finger.

Figure 14. Piece of wood positioned to seat the

fingers.

12. Make sure the fingers are slightly loose
between the gib and the casting, then use the
hand crank to raise the receiver to fully seat
the fingers up against the casting behind the
gib, as shown in Figure 15.

Finger Fully Seated

Figure 15. Fingers fully seated.

13. Re-tighten all of the gib cap screws.

Model T21320 (Mfg. 2/09 and Later)

-13-

SECTION 3: OPERATIONS

Slip Roll Overview

To reduce the risk of
serious injury when using
this machine, read and
understand this entire
manual before beginning
any operations.

The slip roll is used to flatten or form cylinders,
cones, and arcs in mild sheet metal up to 22
gauge in thickness and 12" wide, as well as wires
and rods. Three steel rollers are configured to
draw the workpiece through a path that will pro­duce the desired results (see Figures 16–17).

Damage to your eyes, hands and feet could
result from using this machine without prop­er protective gear. Always wear safety glass­es, leather gloves, and steel toe footwear
when operating this machine.

Loose hair, clothing, or
jewelry could get caught
in machinery and cause
serious personal injury.
Keep these items away
from moving parts at all
times to reduce this risk.

Thickness Adjustment

Top Roller

Feed

Direction

Bottom

Roller

Figure 16. Side profile of the slip rollers and

controls.

Rollers

Leaf Bolt

Rear Roller

Diameter

Adjustment

Knob

Thickness

Adjustment

Leaf Bolt

NOTICE

If you have never used this type of machine
or equipment before, WE STRONGLY REC­OMMEND that you read books, review
industry trade 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.

-14-

Diameter

Adjustment Knob

Figure 17. Slip rollers and controls.

Model T21320 (Mfg. 2/09 and Later)

• Due to the many variables of different sheet
metal types, no single configuration of the
rollers will create the same curve on all mate­rials. Rolling sheet metal to achieve an exact
radius is a trial-and-error process.

• Performing multiple passes through the
machine with gradual reductions in the curve
radius produces better results than trying to
make the curve in one pass.

• To avoid pitted workpieces and damage to
the roller surfaces, always make sure the
workpiece and the rollers are free of grit and
any foreign material before every use.

Flat RollingSlip Roll Tips

The rollers of this machine
present a pinching hazard.
Make sure no body part or
clothing is near the rollers
during operation. Failure
to follow this warning may
result in fingers, hair, or
clothing being pulled into
the machine, causing per­sonal injury.

The Model T21320 can be used to straighten or
flatten workpieces.

• Unless the operation requires a cone-type
curve, always keep the rear roller parallel
to the front rollers by rotating the diameter
adjustment knobs the same amount.

Note: In the following procedures, adjustments
must be made at both ends of the rollers, even if
just one adjustment location is mentioned.

To flat roll a workpiece:

1. Use the diameter adjustment knobs to lower

the rear roller until it is even with the level of
the bottom roller, as illustrated in Figure 18.

Rear Roller

Diameter

Bottom

Roller

Adjustment

Knob

Model T21320 (Mfg. 2/09 and Later)

Figure 18. Bottom and rear rollers even.

-15-

2. Loosen the thickness adjustment leaf bolts
until you can insert the workpiece between
the upper and lower rollers, then evenly snug
down the leaf bolts until you feel resistance
and the workpiece is firmly held between the
rollers, as illustrated in Figure 19.

Creating Curves

Your sheet metal machine can easily create con­stant-radius curves in sheet metal up to 22 gauge
in thickness.

Thickness Adjustment

Leaf Bolt

Workpiece

Figure 19. Top roller adjusted to the thickness of

the workpiece.

3. Remove the workpiece, then evenly rotate
the thickness adjustment leaf bolts clockwise

1

⁄4 turn to further lower the top roller to create

additional pressure on the workpiece.

4. Insert the workpiece between the upper and
lower rollers, then use the hand crank to draw
the workpiece through the machine.

The method of creating a specific radius is a trial­and-error process. Due to the many variations
among metal workpieces, no single configuration
of the rollers will reproduce the same curve in
all materials. We recommend testing your roller
configurations on scrap pieces that are the same
dimension and material as your final workpiece.

To create a curve in the workpiece:

1. Use the diameter adjustment knobs to fully

lower the rear roller below the level of the bot­tom roller, then rotate the thickness adjust­ment leaf bolts counterclockwise until the
upper roller can be lifted with enough clear­ance for the workpiece.

NOTICE

Performing multiple passes through the
machine with gradual reductions in the
curve radius produces better results than
trying to make the curve in one or two
passes.

Note: Have an assistant support long

workpieces as they leave the machine so
they do not bend down.

5. Repeat Steps 3–4 until the desired results
are produced.

-16 -

Model T21320 (Mfg. 2/09 and Later)

2. Insert the workpiece between the upper and
lower rollers and just over the rear roller, as
illustrated in Figure 20, then snug the thick­ness adjustment leaf bolts down to hold the
workpiece secure. Make sure you tighten the
leaf bolts the same amount.

Thickness Adjustment

Leaf Bolt

Workpiece

Figure 20. Workpiece positioned to start the

curve.

3. Use the diameter adjustment knobs to raise
the rear roller, then use the hand crank to
pass the workpiece through the machine (see
the illustrations in Figure 21–22).

Initial Flat

Workpiece

Figure 22. Creating a curve in the workpiece.

Note: If your workpiece has an undesired

initial flat, as illustrated in Figure 22, you can
remove it by flipping the workpiece around
and pass it through the front of the machine
so that the initial flat enters last.

4. Slightly tighten the diameter adjustment knobs
the same amount, then pass the workpiece
through the rollers again.

Note: To make a cone, tighten one adjust-

ment knob more than the other.

Note: For good results, make the first bend

less than the final radius, then slightly
decrease the bend with each successive
pass until the final radius has been reached.

Workpiece

Diameter

Adjustment

Knob

Figure 21. Starting the curve.

5. Repeat Step 4 until you have produced the

desired curve.

Model T21320 (Mfg. 2/09 and Later)

-17-

Creating Cylinders

The Model T21320 Slip Roll can be used to easily
and accurately create cylinders.

If you know the diameter of the cylinder you want
to create, use the formula below to calculate the
length of material needed.

NOTICE

Performing multiple passes through the
machine with gradual reductions in the
curve radius produces better results than
trying to make the curve in one or two
passes.

To create a cylinder:

C=Circumference
(Length of Material Needed)

π=Pi (Approximately 3.142)

D=Diameter

Example: Suppose you want to create a 6" diam­eter cylinder. You would use the above formula as
follows:

C=πD
C=(3.142) x 6"
C=18.852"

The result of 18.852" indicates that you need to
start with a piece of sheet metal that is approxi­mately 18.852" in length in order to create a 6"
diameter cylinder.

You can use the slip roll to create a bend with the
correct radius so that the two ends meet, forming
a 6" diameter cylinder (Figure 23).

C=πD

1. Use the diameter adjustment knobs to fully

lower the rear roller below the level of the bot­tom roller, then rotate the thickness adjust­ment leaf bolts counterclockwise until the
upper roller can be lifted with enough clear­ance for the workpiece.

2. Insert the workpiece between the upper and
lower rollers and just over the rear roller, as
illustrated in Figure 24, then snug the thick­ness adjustment leaf bolts down to secure
the workpiece. Make sure you tighten the leaf
bolts the same amount.

Thickness Adjustment

Leaf Bolt

Workpiece

C=��D
C=(3.142) x 6"
C=18.852

6" Dia.

Workpiece

18.852" Circumference

Figure 23. Calculating circumference example.

-18-

Figure 24. Workpiece positioned to start the

curve.

Model T21320 (Mfg. 2/09 and Later)

3. Turn the hand crank clockwise to feed the
workpiece through the machine until it is
approximately half way through the upper
and lower rollers.

4. Turn the diameter adjustment knobs clock­wise knobs to lift the rear roller until the
desired radius bend is reached, as illustrated
in Figure 25. Make sure to turn the knobs
equal amounts so the rear roller is always
parallel with the other rollers. Failure to do so
will create a larger radius on one end than the
other, resulting in a cone shape.

Note: Always err on the side of making the

radius too large rather than too small. It is
easy to decrease the radius but very difficult
to increase the radius later.

Workpiece

Diameter

Adjustment

Knob

5. Turn the hand crank to process the material
through the slip roll. Continue turning until the
workpiece is completely through the upper
and lower rollers, as illustrated in Figure 26.

Feed

Direction

Figure 26. Finishing the first pass.

6. Rotate the workpiece 180°, insert the curved

end into the rollers, then process it through
the machine, as illustrated in Figure 27.

Figure 25. Making the initial bend to create a

cylinder.

Feed

Direction

Figure 27. Curving the workpiece from the

opposite end.

Model T21320 (Mfg. 2/09 and Later)

-19 -

7. Reduce the radius of the curve by raising the
rear roller, then repeat Steps 4–7 until you
have produced the desired cylinder (see the
illustration in Figure 28).

Removing Workpiece

From Rollers

—If the ends of the cylinder do not meet, lift

the rear roller equally at both ends, then
process the entire cylinder through the slip
roll again. Repeat as necessary.

—If the ends of the cylinder overlap, remove

the cylinder as described in Removing
Workpiece on this page. Then, either
attempt to increase the radius by manually
bending it, or scrap the workpiece and start
this procedure again with a new blank.

Feed

Direction

To remove the workpiece from the top roller:

1. Rotate the top roller retainer pin until the flat

portion of the pin is facing toward the roller or
to the right, as shown in Figure 29.

Retainer

Pin

Figure 29. Top roller retainer pin rotated to

release the roller.

Pin Flat

Figure 28. Cylinder completed.

8. When the cylinder is complete, refer to
Removing Workpiece on this page for

detailed instructions on removing the cylinder
from the top roller.

2. Rotate the thickness leaf bolts clockwise
until they no longer apply pressure to the top
roller.

The sharp edges of sheet metal can quickly
cut your hands. Always use caution and
heavy leather gloves when handling sheet
metal.

-20-

Model T21320 (Mfg. 2/09 and Later)

3. Protect your hands from the sharp edges
of the workpiece, then grasp the top roller
and use moderate force to pull it forward, as
shown in Figure 30.

Bending Wire

Your sheet metal machine can bend wires, rods,
and small-diameter tubing between the diameters

1

⁄8" and 13⁄64" (see Figure 31).

of

Figure 30. Releasing the top roller (shown

without a workpiece for photo clarity).

4. Remove the workpiece, slide the top roller
back into place, then secure the roller by
rotating the retainer pin until the flat is no
longer visible.

11

⁄64"

13

⁄64"

1

⁄8"

Figure 31. Slip roller wire grooves.

To ensure even pressure on the material, place
the workpiece in the smallest possible groove on
either side of the rollers. Although a

7

⁄64" rod would

fit into any of the wire grooves, you would use the

1

⁄8" groove since it is the smallest possible groove

the rod will fit into.

Process the material through the machine in the
same manner described on the previous pages
for sheet metal.

Note: The wire grooves can also be used when
rolling sheet metal that has a wire bead on the
side.

Due to the considerable forces exerted on
this machine when in operation, you MUST
securely mount it to a stable and sturdy
workbench or stand. Otherwise, the machine
could tip or fall and result in personal injury
or property damage.

Model T21320 (Mfg. 2/09 and Later)

-21-

Brake Overview

Bend Allowance

The brake of the Model T21320 is used to make
bends 0°–90° in sheet metal up to 22 gauge in
thickness and 12" in width. When you use the
hand crank, the brake fingers force the workpiece
into the groove of the finger receiver to make the
desired bend (see Figures 32–33).

Brake

Finger

Workpiece

Finger

Receiver

Figure 32. Illustrated side profile of the brake

fingers and receiver.

When metal is bent, the outside overall dimension
increases from its original length—this amount is
called the bend allowance. A typical bend allow­ance for a 90° bend in a 22 gauge mild steel
workpiece is approximately 0.050". That means
you need to start with a workpiece that is approxi­mately 0.050" shorter than the desired outside
length of the finished workpiece, as illustrated in
the example of Figure 34.

Desired Finished Length After Bend = 2"

2" - 0.050" = 1.950"

Length of Initial Blank

0.050" Bend Allowance

To Be Subtracted From 2"

Brake

Fingers

Brake

Receiver

Figure 33. Brake fingers and receiver.

Finished Workpiece

2"

Figure 34. Example of accounting for bend

allowance.

Calculating the bend allowance for your operation
requires many variables, such as metal thickness,
type of material, radius of the bend, etc. Detailed
information for calculating the bend allowance can
be found in metalworking handbooks and on the
internet.

An easy way to find the correct dimension of your
initial blank is to measure a piece of scrap of the
same material as the workpiece, make the bend,
then measure the piece again. The difference
between the two measurements is the bend allow­ance, which you subtract from the dimension of
the workpiece blank before the bend.

-22-

Model T21320 (Mfg. 2/09 and Later)

Bending Sheet Metal

Tip: To reduce the chance of scoring your

workpiece when using the brake, always keep the
fingers and receivers clean and lubricated (refer
to Steps 8 –13 beginning on Page 12 for detailed
instructions), and free of burrs or other blemishes.
Also, apply a strip of sturdy tape along the top and
bottom of the bend line.

The brake fingers on this
machine presents a pinch­ing hazard. Make sure no
body part or clothing is near
the area where metal bend­ing occurs. Failure to follow
this warning may result in
severe personal injury.

To bend sheet metal:

1. Mark a line along the width of the workpiece

where the bend is to take place.

3. While holding the workpiece steady, use
the hand crank to raise the finger receiver
to perform the desired bend (see Figure 36
for an example), then lower the receiver and
remove the workpiece.

Figure 36. 90° bend completed.

4. If a reverse bend is required, re-install the
workpiece upside-down, as shown in Figure
37, and repeat Steps 2–3. The minimum

reverse bend possible is

3

⁄4".

2. Use the hand crank to lower the finger receiv­er until you can position the workpiece under­neath the fingers with the bend line aligned
with the tips, as shown in Figure 35.

Note: When performing the same bend-

ing operation on multiple parts, use the
rear work stop to save time positioning the
workpieces.

3

⁄4"

Figure 37. Minimum reverse bend.

Note: When performing a pan and box bend-

ing operation, loosen the cap screws on the
brake finger gib and configure the fingers for
your operation. Remove the fingers you do
not need.

Figure 35. Positioning the workpiece for a bend.

Model T21320 (Mfg. 2/09 and Later)

-23-

Shearing Overview

The Model T21320 has a set of reversible blades
that shear mild steel up to 22 gauge in thickness
and 12" in width. When you use the hand crank
to perform a shear, the upper movable blade is
lowered past the fixed table blade, creating a
shearing action (see Figures 38–39). For repeti­tive cuts, use the adjustable rear work stop.

Holddown Bar

Moveable

Shear
Blade

Cutting Sheet Metal

The shearing blades on this
machine present an ampu­tation hazard. Make sure no
body part or clothing is near
the area where metal shear­ing occurs. Failure to fol­low this warning may result
severe personal injury.

To cut sheet metal:

1. Mark the cut line across the width of the

workpiece.

Workpiece

Fixed
Table

Blade

Figure 38. Illustrated side profile of the shear

components.

Holddown

Bar

Table
Blade

Figure 39. Shearing action (side view).

Table

Shear

Blade

2. Make sure the gap between the shearing
blades is correct for the workpiece material
(refer to Shearing Blade Gap Adjustment
on Page 32 for detailed instructions).

3. Position the workpiece up against the guide
block on the right side of the table, then align
the cut mark with the upper shear blade, as
shown in Figure 40.

Note: The shearing action begins on the right

side of the workpiece and moves to the left.

Holddown Adjustment Bolts

Guide

Block

-24-

Figure 40. Positioning the workpiece for a cut.

Model T21320 (Mfg. 2/09 and Later)

NOTICE

If you need to adjust the gap between
the shearing blades to accommodate your
workpiece, refer to the Shearing Blade
Gap Adjustment subsection on Page 32 for
detailed instructions.

Note: If you are using the rear work stop,

adjust the stop so that at least one square
edge of the workpiece is against it.

4. Use the holddown adjustment bolts to adjust
the holddown bar so that it firmly holds the
workpiece in place without marking or dent­ing it.

5. Keeping all body parts away from the blades,
rotate the hand crank with an even and
steady pressure to complete the cut.

Material Thickness

The Model T21320 is designed to bend and shear
mild steel sheet metal up to 22 gauge in thick­ness.

The higher the gauge number, the thinner the
material. Also, different materials have slightly dif­ferent thicknesses for the same gauge, as shown
in the chart of Figure 41. Make sure you use a
quality set of calipers to verify the material thick­ness in inches before using it in operation.

Keep your workpiece material equal to or thin­ner than that of 22 gauge mild steel sheet metal,
which is 0.0299" thick.

Gauge

22 0.0299" 0.0253" 0.0336" 0.0312"

24 0.0239" 0.0201" 0.0276" 0.0250"

26 0.0179" 0.0159" 0.0217 " 0.0187"

28 0.0149 " 0.0126" 0.0187" 0.0156"

30 0.0120" 0.0100" 0.0157" 0.0125"

32 0.0097" 0.0080" 0.0134" 0.0102"

Figure 41. Equivalent material thickness chart.

Mild

Steel

Alum-

inum

Gal.

Steel

Stainless

Steel

Model T21320 (Mfg. 2/09 and Later)

-25-

ACCESSORIES

SECTION 4: ACCESSORIES

H5614—Wire Gauge US Standard

Calibrated for sheet metal sized from 0 to 30
gauge. The front is marked with gauge sizes, the
back is marked with actual inch measurements.

Figure 42. H5614 Wire Gauge.

®

G5562—SLIPIT
G5563—SLIPIT
G2871—Boeshield
G2870—Boeshield
H3788—G96
H3789—G96

1 Qt. Gel

®

12 oz Spray

®

T-9 12 oz Spray

®

®

Gun Treatment 12 oz Spray

®

Gun Treatment 4.5 oz Spray

T-9 4 oz Spray

H6073—Deluxe Power Snip

Lightweight aluminum cast handles. Full 3

1

⁄2 "
length of cut. Replaceable steel blades. Fully
enclosed finger loops protect hands from sharp
edges. Long handles provide plenty of leverage.
Multi-purpose snip for sheet metal, vinyl and plas­tic.

Figure 44. Model H6073 Deluxe Power Snip.

G5618—De-burring Tool with two Blades
G5619—Extra Aluminum Blades
G5620—Extra Brass and Cast Iron Blade

The quickest tool for smoothing freshly sheared
metal edges. Comes with two blades, one for
steel and aluminum and one for brass and cast
iron.

Figure 43. Recommended products for protect­ing unpainted cast iron/steel part on machinery.

-26-

Figure 45. G5618 De-burring tool.

Model T21320 (Mfg. 2/09 and Later)

G4956—Super Nibbler

The super nibbler is just the ticket for cutting sheet

3

metal up to

⁄64" thick. Extremely narrow headed
design allows cuts in hard-to-reach areas, yet still
features a safety guard to prevent flying splinters.

1

⁄4" overall.

10

1

G8781—4

⁄2" Suction Cup

Handle plate glass, glass mirrors and sheet metal
with safety and security. Simple hand lever action
provides tremendous gripping power on any flat,
smooth material. Buy two Suction Cups for two­handed control!

Figure 46. Model G4956 Super Nibbler.

H5958—Sheet Metal Pliers

For bending and forming sheet metal. Jaws are

1

⁄2 " side. Rubber grips. Overall length is 8". Ideal

3
for HVAC Installers.

Figure 47. Model H5958 Sheet Metal Pliers.

Figure 48. Model G8781 41⁄2" Suction Cup.

G9256—6" Dial Caliper
G9257—8" Dial Caliper
G9258—12" Dial Caliper

These traditional dial calipers are accurate to

0.001" and can measure outside surfaces, inside
surfaces, and heights/depths. Features stainless
steel, shock resistant construction and a dust
proof display. An absolute treat for the perfection­ist!

Model T21320 (Mfg. 2/09 and Later)

Figure 49. Grizzly® Dial Calipers.

-27-

SECTION 5: MAINTENANCE

Schedule

For optimum performance from your machine,
follow this maintenance schedule and refer to any
specific instructions given in this section.

Daily Maintenance:

• Clean the machine.

• Tighten loose mounting bolts.

• Check/replace damaged rollers.

• Check/replace cracked or damaged brake

fingers or receiver (Page 34).

• Sharpen/replace dull or nicked shearing

blades (Page 31).

• Any other unsafe condition.

Monthly Maintenance:

• Lubricate the gears and hand crank bush-

ings.

Semi-Annual Maintenance:

• Lubricate the roller bushings.

Lubrication

Keep your Model T21320 properly lubricated to
help ensure long life and smooth operation of the
machine.

Gears

Clean away grease and built-up grime from the
top and bottom roller gear teeth, as shown in
Figure 50, with a stiff brush and mineral spirits.
When dry, apply a small amount of grease to the
teeth, then use the hand crank to rotate the rollers
and distribute the lubricant.

Cleaning &

Protecting

Cleaning the Model T21320 is relatively easy. Use
shop rags and mineral spirits to wipe down the
machine.

Protect the unpainted cast iron and exposed metal
surfaces (such as the rollers and the brake/shear
components) with regular applications of products
like G96
T-9 (see Section 5: Accessories on Page 26 for
more details).

®

Gun Treatment, SLIPIT®, or Boeshield®

Roller

Gears

Figure 50. Top and bottom roller gears.

-28-

Model T21320 (Mfg. 2/09 and Later)

Hand Crank Bushings

Wipe off the grease fittings next to each hand
crank hub (see Figure 51), then use a grease gun
to add a small amount of multi-purpose grease to
the hand crank bushings.

Grease

Fitting

Figure 51. Hand crank grease fitting.

Roller Bushings

Remove the top roller from the machine, then
remove the bushings from the ends of the roller
(see Figure 52). Use a shop rag and mineral spir­its to clean the bushings and the ends of the roller,
then apply a thin coat of multi-purpose grease to
the roller ends and re-install the bushings.

Use a stiff brush and mineral spirits to clean the
rear roller bushings (see Figure 53), then apply
a small amount of multi-purpose grease to them.
Re-install the top roller and close the cover.

Rear Roller Bushings

Figure 53. Rear roller bushings.

Bushings

Figure 52. Bushings removed from the top roller.

Model T21320 (Mfg. 2/09 and Later)

-29-

SECTION 6: SERVICE

Review the troubleshooting and procedures in this section to fix or adjust your machine if a problem devel­ops. If you need replacement parts or you are unsure of your repair skills, then feel free to call our Technical
Support at [phone].

Troubleshooting

Slip Roll Operation

Symptom Possible Cause Possible Solution

Slip roll creates
cones when trying
to make a cylinder.

Creases or wrinkles
in the workpiece.

Workpiece is pitted
or scratched.

Brake Operation

1. Top and rear rollers not parallel. 1. Use the diameter adjustment knobs to make the
rollers parallel.

1. Excessive pressure applied when rolling. 1. Reduce the radius and perform the bend in several
light passes.

1. Workpiece or rollers are dirty or damaged. 1. Thoroughly clean the workpiece and rollers. Polish
out any nicks/burrs in the rollers, or replace them.

Symptom Possible Cause Possible Solution

Heavy resistance
during bending.

Bend radius is not
consistent across
workpiece.

Tips of brake
fingers are chipping
or rolling.

Workpiece has
scoring marks.

1. Machine capacities are exceeded. 1. Operate within the listed capacities of the machine.

1. Machine capacities are exceeded.

2. Fingers and receiver not aligned.

1. Fingers and receiver not aligned.

2. Workpiece is too thick.

1. Fingers or receiver scratched. 1. Polish out scratches, and apply tape at the bend

1. Operate within the listed capacities of the machine.

2. Properly align the fingers and receiver (Page 34).

1. Properly align the fingers and receiver (Page 34).

2. Operate within the listed capacities of the machine.

locations for further protection.

Shear Operation

Symptom Possible Cause Possible Solution

Machine will not cut
workpiece.

Cuts are not
square.

Poor quality of
cuts with ripping or
tearing.

1. Cut exceeds machine capacities.

2. Not enough gap between blades.

1. Uneven contact with guide or work stop.

2. Blade gap unequal across length.

3. Too much bow in blade.

4. Inadequate holddown pressure.

1. Dull blades.

2. Incorrect blade gap setup.

3. Loose blades.

1. Operate within the listed capacities of the machine.

2. Increase blade gap (Page 32).

1. Maintain proper contact with guide and work stop.

2. Properly adjust blade gap for material (Page 32).

3. Properly adjust blade bow (Page 33).

4. Properly adjust holddown pressure.

1. Reverse/sharpen/replace blades (Page 31).

2. Properly adjust blade gap for material (Page 32).

3. Remove blades, clean thoroughly, and re-install.

-30-

Model T21320 (Mfg. 2/09 and Later)

Shearing Blade

Reversal/

2. Remove the four cap screws that secure

the blade, then carefully remove it from the
machine (see Figure 55).

Replacement

The shearing blades are reversible, so when the
first cutting edge becomes dull, the blades can be
rotated to use the second cutting edge.

When both cutting edges of the blade become
dull, use wet grinding techniques for SK-4 metal
or better to sharpen the cutting face of the blade.
The upper shearing blade uses a 5° relief edge
and the lower table blade does not.

However, if you are not comfortable performing
the sharpening procedure or do not have access
to a professional sharpening service, replacement
blades are available through Grizzly.

Tools Needed Qty

Wrench or Socket 10mm ................................... 1

Hex Wrench 5mm .............................................. 1

To reverse or replace the shearing blades:

1. Remove the hex bolts and springs that secure

the shear holddown bar (see Figure 54).

Tip: When removing or installing the upper

shear blade, remove the cap screw at one
end, then insert a small hex wrench or simi­lar tool through the hole to keep the blade
in place as you remove the rest of the cap
screws.

Upper Shear

Blade Cap Screws

Lower Table

Blade Cap Screws

Figure 55. Shearing blade cap screws.

3. Inspect the blade cutting edge that was in use

for wear, nicks, or burrs.

— If the cutting edge shows wear or nicks and

the other cutting edge has not been used,
rotate the blade and re-install it.

Hex Bolts

Holddown Bar

Figure 54. Shear holddown bar.

The shearing blades are sharp and can
quickly cut your hands. Always wear heavy
leather gloves when handling the shearing
blades to avoid this cutting hazard.

Model T21320 (Mfg. 2/09 and Later)

— If both cutting edges are worn or nicked,

either properly sharpen the cutting face or
replace the blade.

4. Re-install the holddown bar, then check that
the shearing blade gap adjustment is correct
as instructed in the Shearing Blade Gap
Adjustment on Page 32.

-31-

Shearing Blade Gap

Adjustment

The shearing blade gap adjustment determines
the accuracy of the cut. Follow the procedures
below to make sure this adjustment is correct for
the workpiece material being processed.

— If the machine correctly cuts to your sat-

isfaction along the entire length of the
blades, no adjustments are necessary.

— If the cut is clean at one end and not the

other, perform the following Adjusting the
Shear Table procedure on this page.

— If the condition of the cut on the ends is dif-

ferent from the cut in the middle, perform
the following Adjusting the Blade Bow
procedure on Page 33.

The shearing blades on this
machine presents an ampu­tation hazard. Make sure no
body part or clothing is near
the area where metal shear­ing occurs. Failure to follow
this warning may result in
severe personal injury.

Performing the Shear Test

1. While keeping your fingers clear of the shear

blades, shear a piece of scrap material that
is the same as your workpiece along the full
length of the blade, as shown in Figure 56,
then inspect the cut.

Adjusting the Shear Table

Tools Needed Qty

Hex Wrench 6mm .............................................. 1

Standard Screwdriver #2 ................................... 1

To adjust the blade gap by moving the table:

1. Loosen the cap screws on either end of the

shear table that secure it to the machine (see
Figure 57).

Cap Screw

Figure 56. Performing the shear test.

-32-

Table Adjustment Screw

Figure 57. Table adjustment controls.

Model T21320 (Mfg. 2/09 and Later)

2. Evenly rotate the table adjustment screws to
adjust the position of the shearing table until
the blade gap is even, then re-tighten the cap
screws to secure the table in place.

Tools Needed Qty

Wrenches 14mm ................................................ 2

To adjust the blade gap with the blade bow:

Note: Rotating the table adjustment screws

clockwise moves the table toward the upper
shear blade.

3. Perform the previous shear test.

4. If necessary, repeat Steps 1–3 until you are

satisfied with the shear test cut.

Adjusting the Blade Bow

The adjustment bolt of the blade bow is used to
remove any slight bow in the cast iron cross beam
that the brake finger receiver and upper shear
blade are attached to (see Figure 58).

1. Hold the adjustment bolt still, then turn the
jam nut to adjust the center of the cross beam
in or out (see Figure 58).

— If the shear test cut was clean on the ends

of the shear table but not in the middle, turn
the jam nut counterclockwise to force the
adjustment bolt against the cross beam,
moving it in toward the front.

— If the shear test cut was clean in the middle

but not on the ends, rotate the jam nut
clockwise to allow the cross beam to move
back.

2. Perform the previous shear test.

3. If necessary, repeat Steps 1–2 until you are

satisfied with the shear test cut.

Blade Bow

Figure 58. Blade bow.

Adjustment Bolt

& Jam Nut

Model T21320 (Mfg. 2/09 and Later)

-33-

Brake Alignment

The brake fingers on this
machine presents a pinch­ing hazard. Make sure no
body part or clothing is near
the area where metal bend­ing occurs. Failure to follow
this warning may result in
severe personal injury.

During the life of your machine, you may need
to align the brake fingers with the finger receiver
from side-to-side.

3. Place a piece of heavy flat bar stock or a
heavy metal ruler approximately 12" long
across the finger receiver, as shown in
Figure 59.

Adjustment

Bolt

Cap Screw

Heavy Flat Bar

Tools Needed Qty

Hex Wrench 6mm .............................................. 1

Wrench 16mm ................................................... 1

Heavy Flat Bar or Metal Ruler 12" Long ........... 1

To align the brake:

1. Remove, clean, and de-burr all of the finger

tips and the receiver groove, then inspect the
fingers and receiver for any cracks or dam­age.

— If any of the brake fingers or the receiver

are damaged in any way, DO NOT use the
brake until you have replaced these parts
with new ones.

2. Replace the fingers and properly seat them
(refer to Steps 8–13 beginning on Page 12
for detailed instructions).

Figure 59. Checking brake finger alignment.

4. Lower the brake fingers until one just rests on
the metal bar, as shown in Figure 59.

5. Starting at one end, visually check the gap

between the brake fingers and the metal
bar.

6. If you find a gap at one end of the brake,
loosen the cap screw shown in Figure 59 on
that end, then turn the adjustment bolt coun­terclockwise until the gap disappears.

7. Re-tighten the cap screw, remove the metal
bar, and use the hand crank to cycle the
machine 2–3 times.

8. Repeat Steps 3–7 until the brake fingers
rest evenly on the metal bar along its entire
length.

Operating the brake with cracked or dam­aged brake fingers or receiver could cause
these parts to shatter and fly apart, which
could result in personal injury.

-34-

Model T21320 (Mfg. 2/09 and Later)

SECTION 7: PARTS

Main Breakdown

50

19

20

43

45

56

44

15

47

55

12-7

50

48

12-8

22

49

12-9

9

13

53

12-10

58

17

8

14

57

23

23

46

11

54

6

27

85

5

28

30

24

38

32

31

34

3

38

53

52

51

21

10

63

62

16

2

60

59

33

Model T21320 (Mfg. 2/09 and Later)

28

41

89

25

86

1A

18

4

35

29

40

7

18-1

26

39

64

-35-

Main Parts List

REF PART # DESCRIPTION REF PART # DESCRIPTION

1A PT21320001A LEFT FRAME V2.12.06 31 PT21320031 BOTTOM SLIP ROLLER
2 PT21320002 SHEARING TABLE 32 PT21320032 TOP SLIP ROLLER
3 PT21320003 TOP CROSSBEAM 33 PT21320033 SLIP ROLLER COVER
4 PT21320004 CRANK ARM 34 PT21320034 TOP ROLLER RETAINER PIN
5 PT21320005 RIGHT FRAME V2.03.99 35 PT21320035 HAND CRANK HUB
6 PT21320006 BOTTOM CROSSBEAM 38 PK07M KEY 6 X 6 X 20
7 PT21320007 CRANK HUB END CAP 39 PSB01M CAP SCREW M6-1 X 16
8 PT21320008 HOLDDOWN STUD 40 PSB68M CAP SCREW M6-1 X 8
9 PT21320009 COMPRESSION SPRING 41 PB05M HEX BOLT M6-1 X 8
10 PT21320010 HOLDDOWN BAR 43 PT21320043 STAR KNOB
11 PT21320011 FINGER RECEIVER 44 PB05M HEX BOLT M6-1 X 8
12-7 PT21320012-7 BRAKE FINGER 4" 45 PB126M HEX BOLT M8-1.25 X 40
12-8 PT21320012-8 BRAKE FINGER 3" 46 PW01M FLAT WASHER 8MM
12-9 PT21320012-9 BRAKE FINGER 2" 47 PB126M HEX BOLT M8-1.25 X 40
12-10 PT21320012-10 BRAKE FINGER 1" 48 PSB31M CAP SCREW M8-1.25 X 25
13 PT21320013 FINGER GIB 49 PW01M FLAT WASHER 8MM
14 PB126M HEX BOLT M8-1.25 X 40 50 PN03M HEX NUT M8-1.25
15 PT21320015 BUSHING 51 PB70M HEX BOLT M10-1.5 X 16
16 PT21320016 GUIDE BLOCK 52 PCAP31M CAP SCREW M8-1.25 X 25
17 PT21320017 TABLE ADJUSTMENT SCREW 53 PSB69M CAP SCREW M6-1 X 24
18 PT21320018 HAND CRANK ASSEMBLY 54 PSB11M CAP SCREW M8-1.25 X 16
18-1 PT21320018-1 HAND CRANK BAR 55 PW01M FLAT WASHER 8MM
19 PT21320019 WORK STOP ROD 56 PB71M HEX BOLT M6-1 X 45
20 PT21320020 STOP BLOCK 57 PSB04M CAP SCREW M6-1 X 10
21 PT21320021 WORK STOP PLATE 58 PSB04M CAP SCREW M6-1 X 10
22 PT21320022 BLADE BOW 59 PSB04M CAP SCREW M6-1 X 10
23 PT21320023 SHEAR BLADE 60 PSB14M CAP SCREW M8-1.25 X 20
24 PT21320024 REAR SLIP ROLLER 62 PAW05M HEX WRENCH 5MM
25 PT21320025 DIAMETER ADJUSTMENT SCREW 63 PAW06M HEX WRENCH 6MM
26 PT21320026 HAND CRANK KNOB 64 PT21320064 CRANK HANDLE LOCK KNOB
27 PT21320027 THICKNESS LEAF BOLT 85 PT21320085 SLIP COVER STOP PIN
28 PT21320028 ROLLER BUSHING 86 PT21320086 GREASE FITTING 5/16" X 3/16"
29 PT21320029 CRANK HUB RETAINER 89 PN02M HEX NUT M10-1.5
30 PT21320030 ROLLER GEAR

-36-

Model T21320 (Mfg. 2/09 and Later)

103

Label Placement

104

102

105

106

107

Safety labels warn about machine hazards and ways to prevent injury. The owner of this machine
MUST maintain the original location and readability of the labels on the machine. If any label is
removed or becomes unreadable, REPLACE that label before using the machine again. Contact
Grizzly at [phone] or www.grizzly.com to order new labels.

Model T21320 (Mfg. 2/09 and Later)

-37-

-38-

Model T21320 (Mfg. 2/09 and Later)

WARRANTY CARD

Name _____________________________________________________________________________

Street _____________________________________________________________________________

City _______________________ State _________________________ Zip _____________________

Phone # ____________________ Email _________________________________________________

Model # ____________________ Order # _______________________ Serial # __________________

The following information is given on a voluntary basis. It will be used for marketing purposes to help us develop
better products and services. Of course, all information is strictly confidential.

1. How did you learn about us?
____ Advertisement ____ Friend ____ Catalog
____ Card Deck ____ Website ____ Other:

2. Which of the following magazines do you subscribe to?

____ Cabinetmaker & FDM
____ Family Handyman
____ Hand Loader
____ Handy
____ Home Shop Machinist
____ Journal of Light Cont.
____ Live Steam
____ Model Airplane News
____ Old House Journal
____ Popular Mechanics

3. What is your annual household income?
____ $20,000-$29,000 ____ $30,000-$39,000 ____ $40,000-$49,000
____ $50,000-$59,000 ____ $60,000-$69,000 ____ $70,000+

CUT ALONG DOTTED LINE

4. What is your age group?
____ 20-29 ____ 30-39 ____ 40-49
____ 50-59 ____ 60-69 ____ 70+

5. How long have you been a woodworker/metalworker?
____ 0-2 Years ____ 2-8 Years ____ 8-20 Years ____20+ Years

6. How many of your machines or tools are Grizzly?
____ 0-2 ____ 3-5 ____ 6-9 ____ 10+

____ Popular Science
____ Popular Woodworking
____ Precision Shooter
____ Projects in Metal
____ RC Modeler
____ Rie
____ Shop Notes
____ Shotgun News
____ Today’s Homeowner
____ Wood

____ Wooden Boat
____ Woodshop News
____ Woodsmith
____ Woodwork
____ Woodworker West
____ Woodworker’s Journal
____ Other:

7. Do you think your machine represents a good value? _____ Yes _____No

8. Would you recommend Grizzly Industrial to a friend? _____Yes _____No

9. Would you allow us to use your name as a reference for Grizzly customers in your area?
Note: We never use names more than 3 times. _____ Yes _____No

10. Comments: _____________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

FOLD ALONG DOTTED LINE

FOLD ALONG DOTTED LINE

Place

Stamp

Here

GRIZZLY INDUSTRIAL, INC.
P.O. BOX 2069
BELLINGHAM, WA 98227-2069

Send a Grizzly Catalog to a friend:

Name_______________________________

Street_______________________________

City______________State______Zip______

TAPE ALONG EDGES--PLEASE DO NOT STAPLE

WARRANTY AND RETURNS

We shall in no event be liable for death, injuries to persons or property or for incidental, contingent, special,

WARRANTY AND 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, repairs or alterations or lack of maintenance. This is Grizzly’s sole written warranty
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.
In no event shall Grizzly’s liability under this warranty exceed the purchase price paid for the product and
any legal actions brought against Grizzly shall be tried in the State of Washington, County of Whatcom.

or consequential damages arising from the use of our products.

To take advantage of this warranty, contact us by mail or phone and give us all the details. We will then
issue you a “Return Number,’’ which must be clearly posted on the outside as well as the inside of the
carton. We will not accept any item back without this number. Proof of purchase must accompany the
merchandise.

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.

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.