Harbor Freight Tools 93212 User Manual
7” X 10” PRECISION
MINI LATHE
Model
93212
SET UP AND OPERATING INSTRUCTIONS
Visit our website at: http://www.harborfreight.com
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
Copyright© 2006 by Harbor Freight Tools®. All rights reserved. No portion of this manual or any artwork
contained herein may be reproduced in any shape or form without the express written consent of
Harbor Freight Tools. Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein. Tools required for
assembly and service may not be included.
For technical questions or replacement parts, please call 1-800-444-3353.
Manual Revised 10e
CONTENTS
IMPORTANT SAFETY
INFORMATION .................................3
GENERAL TOOL SAFETY WARNINGS . 3
GROUNDING INSTRUCTIONS ..........5
110-120 V~ GROUNDED TOOLS:
TOOLS WITH THREE PRONG PLUGS 5
MINI LATHE SAFETY WARNINGS ......... 5
SPECIFICATIONS ...............................8
UNPACKING .......................................8
PACKING LIST ........................................ 8
GENERAL MINI LATHE
COMPONENTS ................................9
POWER CONTROLS OVERVIEW ...10
CONTROLS ON THE FRONT OF THE
LATHE ................................................. 10
OPERATION .....................................20
START UP ............................................. 20
TO STOP THE LATHE ........................... 21
BASIC OPERATIONS ........................... 22
THREADING GEARS ............................ 23
THREAD SIZE GEAR SETTINGS ......... 23
AUTOMATIC FEED AND THREADING
DIAL .................................................... 24
MAINTENANCE AND SERVICING ...25
CLEANING, MAINTENANCE, AND
LUBRICATION .................................... 25
BELT INSPECTION AND TENSIONING 25
GIB ADJUSTMENTS ............................. 26
TAILSTOCK ALIGNMENT ..................... 26
REPLACEMENT OF CARBON
BRUSHES ........................................... 27
REPLACING THE FUSE ....................... 28
TROUBLESHOOTING ........................... 29
CONTROLS ON THE BACK OF THE
LATHE ................................................. 10
LATHE COMPONENTS OVERVIEW 11
ASSEMBLY INSTRUCTIONS ...........12
ATTACHING RUBBER FEET OR
INSTALLING TO WORKBENCH ........ 12
INSTALLING HANDWHEEL HANDLES 12
INSTALLING GUARDS ......................... 13
SET UP ..............................................14
INITIAL TEST RUN ................................ 14
REPLACEMENT OF CHUCK ................ 15
REPLACEMENT OF JAWS ................... 15
COMPOUND REST ADJUSTMENT ...... 17
TAILSTOCK ADJUSTMENTS ............... 17
TOOL POST ADJUSTMENT ................. 18
ASSEMBLY DIAGRAM .....................34
ASSEMBLY DIAGRAM
(CONTINUED) ................................35
WIRING DIAGRAM ...........................36
LIMITED 1 YEAR / 90 DAY
WARRANTY ...................................37
AUTOMATIC FEEDING ......................... 18
THREADING DIAL ................................ 19
REV 10b
Page 2 For technical questions, please call 1-800-444-3353. SKU 93212
SAVE THIS MANUAL
Keep this manual for the safety warnings
and precautions, assembly, operating,
inspection, maintenance and cleaning
procedures. Write the product’s serial number
in the back of the manual near the assembly
diagram (or month and year of purchase if
product has no number). Keep this manual
and the receipt in a safe and dry place for
future reference.
IMPORTANT SAFETY
INFORMATION
In this manual, on the labeling, and
all other information provided with
this product:
This is the safety alert
symbol. It is used to alert
you to potential personal
injury hazards. Obey all
safety messages that follow
this symbol to avoid possible
injury or death.
DANGER indicates a
hazardous situation
which, if not avoided, will result
in death or serious injury.
WARNING indicates a
hazardous situation
which, if not avoided, could
result in death or serious injury.
NOTICE is used to
address practices not
related to personal injury.
CAUTION, without the
safety alert symbol, is
used to address practices not
related to personal injury.
General Tool Safety Warnings
WARNING Read all safety warnings
and instructions. Failure to follow the
warnings and instructions may result
in electric shock, re and/or serious
injury.
Save all warnings and instructions
for future reference.
KEEP GUARDS IN PLACE and in 1.
working order.
REMOVE ADJUSTING KEYS AND 2.
WRENCHES. Form habit of checking to
see that keys and adjusting wrenches
are removed from tool before turning it
on.
KEEP WORK AREA CLEAN. Cluttered 3.
areas and benches invite accidents.
DON’T USE IN DANGEROUS 4.
ENVIRONMENT. Don’t use power tools
in damp or wet locations, or expose them
to rain. Keep work area well lighted.
KEEP CHILDREN AWAY. All visitors 5.
should be kept safe distance from work
area.
CAUTION, used with
the safety alert
symbol, indicates a hazardous
situation which, if not avoided,
could result in minor or moderate
injury.
MAKE WORKSHOP KID PROOF 6.
with padlocks, master switches, or by
removing starter keys.
DON’T FORCE TOOL. It will do the job 7.
better and safer at the rate for which it
was designed.
Page 3For technical questions, please call 1-800-444-3353.SKU 93212
USE RIGHT TOOL. Don’t force tool or 8.
attachment to do a job for which it was
not designed.
RECOMMENDED MINIMUM WIRE
GAUGE FOR EXTENSION CORDS
(120 VOLT)
NAMEPLATE
AMPERES
(at full load)
0 – 6 18 16 16 14
6.1 – 10 18 16 14 12
10.1 – 12 16 16 14 12
12.1 – 16 14 12 Do not use.
EXTENSION CORD
LENGTH
25’ 50’ 100’ 150’
TABLE A
DON’T OVERREACH. Keep proper 13.
footing and balance at all times.
MAINTAIN TOOLS WITH CARE. Keep 14.
tools sharp and clean for best and safest
performance. Follow instructions for
lubricating and changing accessories.
DISCONNECT TOOLS before servicing; 15.
when changing accessories, such as
blades, bits, cutters, and the like.
REDUCE THE RISK OF 16.
UNINTENTIONAL STARTING. Make
sure switch is in off position before
plugging in.
USE PROPER EXTENSION CORD. 9.
Make sure your extension cord is in good
condition. When using an extension
cord, be sure to use one heavy enough
to carry the current your product will
draw. An undersized cord will cause a
drop in line voltage resulting in loss of
power and overheating. Table A shows
the correct size to use depending on
cord length and nameplate ampere
rating. If in doubt, use the next heavier
gauge. The smaller the gauge number,
the heavier the cord.
WEAR PROPER APPAREL. Do not wear 10.
loose clothing, gloves, neckties, rings,
bracelets, or other jewelry which may get
caught in moving parts. Nonslip footwear
is recommended. Wear protective hair
covering to contain long hair.
ALWAYS USE SAFETY GLASSES. Also 11.
use face or dust mask if cutting operation
is dusty. Everyday eyeglasses only have
impact resistant lenses, they are NOT
safety glasses.
USE RECOMMENDED ACCESSORIES. 17.
Consult the owner’s manual for
recommended accessories. The use of
improper accessories may cause risk of
injury to persons.
NEVER STAND ON TOOL. Serious 18.
injury could occur if the tool is tipped
or if the cutting tool is unintentionally
contacted.
CHECK DAMAGED PARTS. Before 19.
further use of the tool, a guard or other
part that is damaged should be carefully
checked to determine that it will operate
properly and perform its intended
function – check for alignment of moving
parts, binding of moving parts, breakage
of parts, mounting, and any other
conditions that may affect its operation.
A guard or other part that is damaged
should be properly repaired or replaced.
NEVER LEAVE TOOL RUNNING 20.
UNATTENDED. TURN POWER OFF.
Don’t leave tool until it comes to a
complete stop.
SECURE WORK. Use clamps or a vise 12.
to hold work when practical. It’s safer
than using your hand and it frees both
hands to operate tool.
Page 4 For technical questions, please call 1-800-444-3353. SKU 93212
GROUNDING INSTRUCTIONS
TO PREVENT
ELECTRIC SHOCK
AND DEATH FROM INCORRECT
GROUNDING WIRE
CONNECTION
READ AND FOLLOW THESE
INSTRUCTIONS:
3-pole receptacles that accept the tool’s
plug.
Repair or replace damaged or worn cord 6.
immediately.
110-120 V~ Grounded Tools: Tools
with Three Prong Plugs
In the event of a malfunction or 1.
breakdown, grounding provides a path
of least resistance for electric current
to reduce the risk of electric shock.
This tool is equipped with an electric
cord having an equipment-grounding
conductor and a grounding plug. The
plug must be plugged into a matching
outlet that is properly installed and
grounded in accordance with all local
codes and ordinances.
Do not modify the plug provided – if it will 2.
not t the outlet, have the proper outlet
installed by a qualied electrician.
Improper connection of the equipment-3.
grounding conductor can result in a risk
of electric shock. The conductor with
insulation having an outer surface that
is green with or without yellow stripes is
the equipment-grounding conductor. If
repair or replacement of the electric cord
or plug is necessary, do not connect the
equipment-grounding conductor to a live
terminal.
Grounding
Pin
125 V~ 3-Prong Plug and Outlet
(for up to 125 V~ and up to 15 A)
This tool is intended for use on a circuit 7.
that has an outlet that looks like the one
illustrated above in 125 V~ 3-Prong
Plug and Outlet. The tool has a
grounding plug that looks like the plug
illustrated above in 125 V~ 3-Prong
Plug and Outlet.
The outlet must be properly installed and 8.
grounded in accordance with all codes
and ordinances.
Do not use an adapter to connect this 9.
tool to a different outlet.
Mini Lathe Safety Warnings
FOR YOUR OWN SAFETY, READ AND 1.
UNDERSTAND THIS INSTRUCTION
MANUAL BEFORE OPERATING
LATHE.
Wear ANSI-approved eye protection.2.
Check with a qualied electrician or 4.
service personnel if the grounding
instructions are not completely
understood, or if in doubt as to whether
the tool is properly grounded.
Use only 3-wire extension cords that 5.
have 3-prong grounding plugs and
Do not wear gloves, necktie, or loose 3.
clothing while operating the Lathe.
Tie back long hair. Long hair in a ponytail 4.
needs to be secured so there is no risk
of entanglement.
Tighten all locks before operating.5.
Page 5For technical questions, please call 1-800-444-3353.SKU 93212
DO NOT OPERATE WITH ANY 6.
GUARD DISABLED, DAMAGED, OR
REMOVED. Moving guards must
move freely and close instantly.
Rotate workpiece by hand before 7.
applying power.
Rough out workpiece before installing on 8.
faceplate.
Do not mount split workpiece or one 9.
containing knot.
Use lowest speed when starting new 10.
workpiece.
Do not reverse motor direction while the 11.
lathe is in motion.
Do not clear chips by hand or when 12.
lathe is running. Use a brush to sweep
chips away after the tool has come to a
complete stop.
Select the proper tool for the job. Using 13.
the correct tool for the job produces a
better nish and minimizes strain on the
lathe.
carriage will contact the chuck during
operation.
Use the appropriate feed and speed 19.
rates for the project.
Allow the lathe to reach its full speed 20.
before beginning a cut.
Only use safety equipment that has been 21.
approved by an appropriate standards
agency. Unapproved safety equipment
may not provide adequate protection.
Eye protection must be ANSI-approved
and breathing protection must be
NIOSH-approved for the specic hazards
in the work area.
Industrial applications must follow OSHA 22.
guidelines.
Maintain labels and nameplates on 23.
the tool. These carry important safety
information. If unreadable or missing,
contact Harbor Freight Tools for a
replacement.
Avoid unintentional starting. Prepare to 24.
begin work before turning on the tool.
The use of accessories or attachments 14.
not recommended by the manufacturer
may result in a risk of injury to persons.
When servicing, use only identical
replacement parts.
Support pieces extending beyond the 15.
headstock so they cannot cause injury to
the operator, bystanders or lathe. Turn
supported long stock at slower RPM’s.
Use a chuck cradle or piece of plywood 16.
to protect the precision ground ways and
your hands when servicing chucks.
Check that the workpiece, tool, tool post, 17.
chuck and saddle all have adequate
clearance before starting the lathe.
Check that no part of the tool, tool 18.
holder, compound slide, cross slide, or
People with pacemakers should 25.
consult their physician(s) before use.
Electromagnetic elds in close proximity
to heart pacemaker could cause
pacemaker interference or pacemaker
failure.
WARNING: Some dust created by power 26.
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 and
cement or other masonry products
• Arsenic and chromium from chemically
treated lumber
Page 6 For technical questions, please call 1-800-444-3353. SKU 93212
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 lter out
microscopic particles. (California Health
& Safety Code § 25249.5, et seq.)
or physical symptoms related to vibration
(such as tingling, numbness, and white
or blue ngers), seek medical advice as
soon as possible.
Do not smoke during use. Nicotine 2.
reduces the blood supply to the hands
and ngers, increasing the risk of
vibration-related injury.
WARNING: Handling the cord on this 27.
product will expose you to lead, a
chemical known to the State of California
to cause cancer, and birth defects or
other reproductive harm. Wash hands
after handling. (California Health &
Safety Code § 25249.5, et seq.)
The warnings, precautions, and 28.
instructions discussed in this instruction
manual cannot cover all possible
conditions and situations that may occur.
It must be understood by the operator
that common sense and caution are
factors which cannot be built into this
product, but must be supplied by the
operator.
Vibration Safety
This tool vibrates during use. Repeated
or long-term exposure to vibration may
cause temporary or permanent physical
injury, particularly to the hands, arms
and shoulders. To reduce the risk of
vibration-related injury:
Wear suitable gloves to reduce the 3.
vibration effects on the user.
Use tools with the lowest vibration when 4.
there is a choice between different
processes.
Include vibration-free periods each day 5.
of work.
When cutting do not apply too much 6.
pressure to the workpiece. Let the tool
do the work.
To reduce vibration, maintain the tool 7.
as explained in this manual. If any
abnormal vibration occurs, stop use
immediately.
SAVE THESE
INSTRUCTIONS.
Anyone using vibrating tools regularly 1.
or for an extended period should rst
be examined by a doctor and then have
regular medical check-ups to ensure
medical problems are not being caused
or worsened from use. Pregnant
women or people who have impaired
blood circulation to the hand, past hand
injuries, nervous system disorders,
diabetes, or Raynaud’s Disease should
not use this tool. If you feel any medical
REV 10b
Page 7For technical questions, please call 1-800-444-3353.SKU 93212
SPECIFICATIONS
Packing List
Motor 120 V~ / 60 Hz / 3/4 HP
Speed Ranges
Fuse Type
Belt
Drive Gear and Belt
Swing Over Bed 7”
Dist. Between Centers 10”
Swing Over Cross Slide 2-1/8”
Swing Over Saddle 4-1/2”
Swing Over Gap 7”
Max. Tool Bit Size 5/16”
Compound Travel 2-3/4”
Carriage Travel 6-1/2”
Cross Slide Travel 2-3/4”
Work Tolerance 0.005”
Bed Dimensions 15-7/8” L x 3-1/4” W
Tailstock Taper MT#2
Threads
Through Chuck Capacity 5/8”
0 - 1100 RPM (Low)
0 - 2500 RPM (High)
Fast Acting 4 amp mini
glass (F4AL250VP)
Lx136
Pitch: 1.5mm
Teeth: 70
18 threads from 12 - 52
TPI
Description Qty
1 Main unit 1
2 External Chuck Jaw Set 3 jaws 166
3 Chip Tray 1 126
4 Chuck Key 1 167
5 5 A Fuse 1 314
6 Gear: 30, 35, 40, 40, 45,
50, 55, 57, 60, 65 T
7 Spanner Wrench: 8-10,
14-17
8 Hex Key Wrench Set: 3,
4, 5, 6
9 Oil can 1 310
10 MT:2 Live Center 1 143
11 Rubber Foot 4 125
12
Rubber Foot Mounting
Screw
13
Knob 2 85
14
Manual 1 317
10
gears
2
wrenches
4
wrenches
4 67
Part
#(s)
157-
165
312,
313
311
Chuck Dia.
(mm)
80
A
Internal Jaws
A - A1 B - B1 C - C1
5/64” - 1-1/8” 1” - 2-3/4” 7/8” - 2-1/2”
B
A1
B1
External
Jaws
C
C1
Shipping Bolt Locations
To remove the lathe from the packing
crate, remove both bolts on the crate bottom
as shown above.
UNPACKING
Many components need to be installed
before use. It is ESSENTIAL that both
When unpacking, make sure that the
item is intact and undamaged. If any parts
are missing or broken, please call Harbor
guards (found in separate boxes within the
main box) are installed before connecting
power.
Freight Tools at 1-800-444-3353 as soon as
possible.
Note: Wipe off protective grease from the
lathe before using.
Page 8 For technical questions, please call 1-800-444-3353. SKU 93212
REV 10b, 10e
GENERAL MINI LATHE COMPONENTS
Note: Refer to the parts list and diagram at the end of this manual for complete part number
listings and locations. See the following page for a description of the major components.
Part Description
1 Bed Way
2 Chuck
33 H/L Speed Gear Shift Lever
35 Feed Direction Selector
53 Gear Drive Cover
79 Automatic Feed Handle
84a Tailstock Quill Control Wheel
84b Feed Control Wheel
86a Cross Slide Crank
86b Compound Rest Crank
100 Cross Slide
105/108 Compound Rest (A and B)
112 Tool Post
124 Power Cord
181 179 180 2 112 105 143 146 138 84(a)
178
Part Description
126 Chip Tray
129 Lead Screw
138 Tailstock
143 Live Center
146 Tailstock Quill Fix Holder
151 Motor Cover
153 Rear Splash Guard
178 Power Switch
179 Fuse Holder
180 Speed Control Knob
181 Forward-Off-Reverse Switch
268 Tailstock Set Screw
302 Thread Dial Indicator
REV 10b
268
86(b)
129302100 7984(b) 86(a)1
153
126 33 151 124
Figure 1
3553
Page 9For technical questions, please call 1-800-444-3353.SKU 93212
POWER CONTROLS OVERVIEW
Controls on the Front of the Lathe
Forward-OFF-Reverse Switch (181)
Power Switch (178)
Figure 2
Power Switch (178)
Turns on and off power to the motor.
When the Power Switch is lit, the motor
is on.
Forward-OFF-Reverse Switch (181)
Changes the Spindle (3) (Chuck (2))
rotation from Forward (clockwise),
to OFF (no rotation), to Reverse
(counterclockwise).
Speed Control Knob (180)
Controls on the Back of the Lathe
Feed Direction Selector (35)
H/L Gear Shift Lever (33)
Figure 3
Feed Direction Selector (35)
Changes the Lead Screw (129) rotation
from Forward (toward the Chuck) to
Neutral (no rotation), to Reverse (away
from the Chuck).
DO NOT Change the Feed Direction
Selector while the Lathe is running.
DO NOT change the Forward-OFFReverse Switch direction while the
lathe is running.
Speed Control Knob (180)
Adjusts the Spindle (3) speed from 0 to
2500 RPMs.
H/L Gear Shift Lever (33)
Changes the spindle speed range from
High (0 - 2500 RPM) to Low (0-1100
RPM).
DO NOT adjust the H/L Gear Shift
Lever while the Lathe is running.
Check that this knob is at 0 before
turning on the Lathe.
Note: The Speed Control Knob (180) is
dependant on the H/L Gear Shift Lever
(33). When the H/L Gear Shift Lever is in
the Low setting, the Speed Control Knob
runs from 0 to 1100 RPM. When the H/L
Gear Shift Lever is in the High setting,
the Speed Control Knob runs from 0 to
2500 RPM.
Page 10 For technical questions, please call 1-800-444-3353. SKU 93212
REV 10b
LATHE COMPONENTS OVERVIEW
Following are brief descriptions of major components of the Mini Lathe.
Bed Way (1) - The Bed Way is the base of
the work area under the Chuck and
Tailstock. It is where the Tailstock and
Compound Rest are attached and what
they slide along.
Chuck (2) - The Chuck holds the three Jaws
(two sets included) which clamp the work
piece in place.
Compound Rest (105/108) - The Compound
Rest and Compound Slide (100) work
together to adjust the position of the
Cutting Tool to the desired location.
Jaws (166 & 168) - The Jaws t into the
Chuck (2) and hold the workpiece in
place. There are a set of internal Jaws
(168), which t inside the workpiece
and External Jaws (166) which t on the
outside of the workpiece.
Tailstock (138) - The Tailstock holds the
Tailstock Quill (142) which is used to
hold various tools (sold separately) or a
Live Center (143).
Thread Indicator Dial (302) - The Threading
Dial is used to measure the number of
rotations of the Lead Screw when thread
cutting. It eliminates the need to reverse
the lathe and return the carriage to the
starting point each time a successive
threading cut is taken. You must adjust
the Threading Dial so that it engages
the Lead Screw (129) in order for it to
function.
Threading Gears (45,50, 59, 157-165) - The
Threading Gears are positioned under
the Gear Drive Cover (53) on the far
left side of the Lathe. They are used in
various congurations for thread cutting.
Lead Screw (129) - The Lead Screw controls
automatic feeding. In thread cutting or
when you want to cut into the workpiece
automatically, you engage the Lead
Screw with the Feeding Direction
Selector (35) and use the Automatic
Feed Handle (79). Keep track of the cut
with the Thread Dial Indicator (302).
Live Center (143) - The Live Center ts into
the Tailstock Quill (142) on the Tailstock
(138) and helps to hold the end of the
workpiece that is opposite from the
Chuck (2). A live center spins with the
workpiece and chuck, while a dead
center (sold separately) does not spin.
Tool Post (112) - The Tool Post sits on the
top of the Compound Rest (105/108) and
is used to hold various cutting tools by
clamping them in place with Tool Post
Bolts (110).
REV 10b
Page 11For technical questions, please call 1-800-444-3353.SKU 93212
ASSEMBLY INSTRUCTIONS
Note: For additional information regarding the
parts listed in the following pages, refer
to the Assembly Diagram near the end of
this manual.
To Mount the Lathe to a Workbench:
Drill holes for permanent mounting:
14-7/8”
2-7/8”
1. WARNING! Make sure the Power
Switch of the tool is in its “OFF” position
and that the tool is unplugged from
its electrical outlet before making any
adjustments to the tool.
Clean off the protective grease on the 2.
Mini Lathe.
Attaching Rubber Feet or
Installing to Workbench
Note: Mount or place the Lathe on a sturdy
workbench or table, with good lighting,
at a height that allows you to comfortably
work without back strain.
The Lathe can be mounted permanently
to a workbench or used with it’s included
Rubber Feet (125) on a tabletop.
To Attach the Rubber Feet:
Figure 5
Unthread the Bolts (67) from the bottom
of the unit. Measure and drill holes in the
workbench. Use appropriate length M6-1
bolts and washers (sold separately) to
secure the Lathe and Chip Tray to the
workbench.
Installing Handwheel Handles
Tailstock Quill Control Wheel (84a)
Cross Slide
Crank (86a)
Feed Control Wheel (84b)
Chip Tray (126) Bolts (67)
Figure 6
Handwheel Handles
1. To install the Handwheel Handles on the
Rubber Feet (125)
Tailstock Quill Control Wheel (84a) and
the Feed Control Wheel (84b), use a
athead screwdriver and a 14mm open
Figure 4
Bolts (67)
To attach the Rubber Feet to the bottom
of the Lathe, unthread the Bolts (67)
from the bottom of the Chip Tray (126).
Slide the Rubber Feet onto the Bolts
and re-thread them into the bottom of
the Lathe through the Chip Tray holes.
Tighten securely.
end wrench to thread the handles onto
the wheels.
For packaging purposes, the Cross Slide 2.
Crank (86a) is shipped from the factory
facing backwards. Adjust the Cross Slide
Crank (86a) to face forward using a 5mm
Hex Wrench (part of 311) to unthread the
Cap Screw (52) and turn the Cross Slide
Crank around. Tighten the Cap Screw
securely.
REV 10b
Page 12 For technical questions, please call 1-800-444-3353. SKU 93212
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