Chicago Electric 94071 Installation manual

3″ MINI TOOL GRINDER
94071
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©2005 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 11a

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CONTENTS
IMPORTANT SAFETY
INFORMATION ........................... 3
GENERAL TOOL SAFETY
WARNINGS ..................................... 3
GROUNDING INSTRUCTIONS .... 5
110-120 V~ GROUNDED TOOLS:
TOOLS WITH THREE PRONG
PLUGS ............................................ 5
GRINDER SAFETY WARNINGS ....... 6
SPECIFICATIONS ......................... 8
UNPACKING ................................. 8
ASSEMBLY INSTRUCTIONS ....... 8
TO ATTACH THE RIGHT
MOVABLE TOOL REST: ................ 8
TO ATTACH THE SPARK SHIELDS: 9
TO MOUNT THE GRINDER ON A
WORKBENCH: ............................... 9
OPERATING INSTRUCTIONS ... 10
INSPECTION, MAINTENANCE,
AND CLEANING ........................11
PARTS LIST ................................ 12
ASSEMBLY DIAGRAM ............... 13
LIMITED 90 DAY WARRANTY ... 14

SKU 94071 For technical questions, please call 1-800-444-3353 PAGE 3
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.
CAUTION, used
with the safety
alert symbol, indicates a
hazardous situation which, if
not avoided, could result in
minor or moderate 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.
1. KEEP GUARDS IN PLACE
and in working order.
2. REMOVE ADJUSTING KEYS
AND WRENCHES. Form habit
of checking to see that keys and
adjusting wrenches are removed
from tool before turning it on.
3. KEEP WORK AREA CLEAN.
Cluttered areas and benches
invite accidents.
4. DON’T USE IN DANGEROUS
ENVIRONMENT. Don’t use
power tools in damp or wet
locations, or expose them to rain.
Keep work area well lighted.

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5. KEEP CHILDREN AWAY. All
visitors should be kept safe
distance from work area.
6. MAKE WORKSHOP KID PROOF
with padlocks, master switches,
or by removing starter keys.
7. DON’T FORCE TOOL. It will do
the job better and safer at the
rate for which it was designed.
8. USE RIGHT TOOL. Don’t force
tool or 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)
EXTENSION CORD
LENGTH
25’ 50’ 100’ 150’
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
TABLE A
9. USE PROPER EXTENSION CORD.
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.
10. WEAR PROPER APPAREL.
Do not wear loose clothing,
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.
11. ALWAYS USE SAFETY GLASSES.
Also use face or dust mask
if grinding operation is dusty.
Everyday eyeglasses only have
impact resistant lenses, they
are NOT safety glasses.
12. DON’T OVERREACH. Keep proper
footing and balance at all times.
13. MAINTAIN TOOLS WITH CARE.
Keep tools sharp and clean for
best and safest performance.
Follow instructions for lubricating
and changing accessories.
14. DISCONNECT TOOLS before
servicing; when changing
accessories, such as blades,
bits, cutters, and the like.
15. REDUCE THE RISK OF
UNINTENTIONAL STARTING.
Make sure switch is in off
position before plugging in.
16. USE RECOMMENDED
ACCESSORIES. Consult the
owner’s manual for recommended
accessories. The use of
improper accessories may cause
risk of injury to persons.
17. NEVER STAND ON TOOL.
Serious injury could occur if the
tool is tipped or if the grinding tool
is unintentionally contacted.
18. CHECK DAMAGED PARTS. Before
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

SKU 94071 For technical questions, please call 1-800-444-3353 PAGE 5
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.
19. DIRECTION OF FEED. Feed
work into a blade or cutter
against the direction of rotation
of the blade or cutter only.
20. NEVER LEAVE TOOL RUNNING
UNATTENDED. TURN POWER OFF.
GROUNDING INSTRUCTIONS
TO PREVENT
ELECTRIC SHOCK
AND DEATH FROM
INCORRECT GROUNDING
WIRE CONNECTION
READ AND FOLLOW THESE
INSTRUCTIONS:
110-120 V~ Grounded Tools:
Tools with Three Prong Plugs
1. In the event of a malfunction or
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.
2. Do not modify the plug provided
– if it will not t the outlet, have
the proper outlet installed by
a qualied electrician.
3. Improper connection of the
equipment-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.
4. Check with a qualied electrician or
service personnel if the grounding
instructions are not completely
understood, or if in doubt as to
whether the tool is properly grounded.
5. Use only 3-wire extension cords
that have 3-prong grounding
plugs and 3-pole receptacles
that accept the tool’s plug.
6. Repair or replace damaged
or worn cord immediately.
125 V~ 3-Prong Plug and Outlet
(for up to 125 V~ and up to 15 A)
Grounding
Pin
7. This tool is intended for use on a
circuit that has an outlet that looks
like the one illustrated above in
125 V~ 3-Prong Plug and Outlet.
8. The tool has a grounding plug that
looks like the plug illustrated above
in 125 V~ 3-Prong Plug and Outlet.

SKU 94071 For technical questions, please call 1-800-444-3353 PAGE 6
9. The outlet must be properly installed
and grounded in accordance
with all codes and ordinances.
10. Do not use an adapter to connect
this tool to a different outlet.
Grinder Safety Warnings
For Your Own Safety Read Instruction
Manual Before Operating Grinder
1. Wear eye protection.
2. Use grinding wheel suitable
for speed of grinder.
3. Replace cracked wheel immediately.
4. Always use guards and eye shields.
5. Do not overtighten wheel nut.
6. Use only anges furnished
with the grinder.
7. Adjust distance between wheel and
work rest to maintain 1/16 inch or
less separation as the diameter of
the wheel decreases with use.
8. Frequently clean grinding
dust from beneath grinder.
9. Wear a full face shield over ANSI-
approved safety goggles during use.
10. Do not grind with side of wheel
unless wheel is specically
designed for that type of grinding.
11. DO NOT OPERATE WITH
ANY GUARD DISABLED,
DAMAGED, OR REMOVED.
12. The use of accessories or
attachments not recommended
by the manufacturer may result
in a risk of injury to persons.
13. When servicing use only
identical replacement parts.
14. Only use safety equipment that has
been 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 specic
hazards in the work area.
15. Industrial applications must
follow OSHA guidelines.
16. Maintain labels and nameplates
on the tool. These carry important
safety information. If unreadable
or missing, contact Harbor Freight
Tools for a replacement.
17. Avoid unintentional starting.
Prepare to begin work before
turning on the tool.
18. People with pacemakers should
consult their physician(s) before
use. Electromagnetic elds in close
proximity to heart pacemaker could
cause pacemaker interference
or pacemaker failure.
19. WARNING: 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 and
cement or other masonry products
• Arsenic and chromium from
chemically treated lumber
Your risk from these exposures

SKU 94071 For technical questions, please call 1-800-444-3353 PAGE 7
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.)
20. WARNING: Handling the cord on
this 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.)
21. The warnings, precautions,
and 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:
1. Anyone using vibrating tools regularly
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
or physical symptoms related to
vibration (such as tingling, numbness,
and white or blue ngers), seek
medical advice as soon as possible.
2. Do not smoke during use. Nicotine
reduces the blood supply to the
hands and ngers, increasing the
risk of vibration-related injury.
3. Wear suitable gloves to reduce
the vibration effects on the user.
4. Use tools with the lowest
vibration when there is a choice
between different processes.
5. Include vibration-free periods
each day of work.
6. Grip tool as lightly as possible
(while still keeping safe control of it).
Let the tool do the work.
7. To reduce vibration, maintain
the tool as explained in this
manual. If any abnormal vibration
occurs, stop use immediately.
SAVE THESE
INSTRUCTIONS.

SKU 94071 For technical questions, please call 1-800-444-3353 PAGE 8
SPECIFICATIONS
Electrical Input 120 V~ / 1 A (Start)
Arbor Shaft 1/2″
No Load Speed 3450 RPM
Mounting Holes 3/16″ Diameter
UNPACKING
When unpacking, check to make
sure all the parts shown on the Parts List
near the end of the manual are included.
If any parts are missing or broken, please
call Harbor Freight Tools at
1-800-444-3353 as soon as possible.
ASSEMBLY INSTRUCTIONS
WARNING! Turn the Grinder off and
unplug it before assembly.
To Attach The Right
Movable Tool Rest:
1. The left Movable Tool Rest
has been pre-attached by the
manufacturer. However, the right
Movable Tool Rest must be attached
by the operator prior to using
the Grinder. (See Figure E.)
2. To attach the right Movable Tool
Rest, insert its mounting slot onto the
protruding, threaded Bolt located on
the front of the Grinder. Then, secure
the Movable Tool Rest, using the
Wing Nut. IMPORTANT: Adjust the
distance between the Movable Tool
Rest and Grinding Wheel to a 1/16″
or less separation. (See Figure E.)
RIGHT
SAFETY
GUARD
COVER
FLAT WASHER
SPRING WASHER
MOVABLE TOOL REST
WING NUT
ONOFF
FIGURE E
REV 11a
3168328

SKU 94071 For technical questions, please call 1-800-444-3353 PAGE 9
To Attach The Eyeshield:
1. An Eyeshield must be attached
to both Right Safety Guard
(to be used as protection
from the Grinding Wheel).
2.
Eyeshield
Attach the Eyeshield to the Guard
using two Screws, two Flat Washers,
and two Spring Washers. Orient it
as shown in the illustration above.
To Mount The Grinder
On A Workbench:
CAUTION! Make sure the workbench
on which the Grinder will be mounted
is at, level, and sturdy enough to
support the weight of the Grinder, any
workpieces, and any additional tools.
1. The Grinder is equipped with four
Rubber Feet which allows the tool
to be temporarily placed upon
a workbench for use. However,
if the Grinder is to be permanently
mounted on a workbench, the
Rubber Feet must be removed.
2. To permanently mount the Grinder
on a workbench, remove the
Rubber Feet and place the Grinder
in the desired work location on
the workbench. Use the four
mounting holes at the Base as
a template to mark the areas
where four 3/16″ diameter
mounting holes should be drilled
through the workbench.
3. Temporarily remove the Grinder, and
drill the four 3/16″ diameter mounting
holes through the workbench, making
sure no hidden electric cords or
cables are in the drilling path.
4. Once the 3/16″ mounting holes
are drilled, align the four mounting
holes at the Base of the Grinder
with the four predrilled mounting
holes in the workbench. Secure
the Grinder to the workbench, using
four appropriate length Bolts, Lock
Washers, and Nuts (not included).
REV 06c; 11a

SKU 94071 For technical questions, please call 1-800-444-3353 PAGE 10
OPERATING INSTRUCTIONS
1.
GRINDING
WHEEL
BUFFING
WHEEL
ONOFF
POWER
SWITCH
Movable
TOOL REST
FIGURE F
Connect the Power Cord/Plug of
the Grinder to the nearest 120 volt,
grounded, electrical outlet.
(See Figure F.)
2. WARNING! ALWAYS
wear ANSI-approved safety
impact eye glasses underneath
an ANSI-approved safety
impact full face shield when
operating the Grinder.
3. Turn the Power Switch to its “ON”
position, and allow the Bufng
Wheel and Grinding Wheel to spin
up to full speed. (See Figure F.)
4. Place the object you are bufng or
grinding rmly against the Movable
Tool Rest and slowly feed the object
into the revolving Bufng Wheel or
Grinding Wheel. (See Figure F.)
5. CAUTION! Keep hands away
from the Bufng Wheel and Grinding
Wheel. Also, make sure to hold the
object you are bufng or grinding
rmly against the Movable Tool
Rest throughout the bufng/grinding
process. Failure to do so may
cause the object to be propelled
by the Bufng Wheel or Grinding
Wheel toward your body and/or
into the Grinder. (See Figure F.)
6. Once the grinding process is
competed, turn the Power Switch of
the Grinder to its “OFF” position. Do
not press against the Bufng Wheel
or Grinding Wheel to stop them
from spinning. Allow the Wheels to
completely stop on their own. Then,
disconnect the Power Cord/Plug from
its electrical outlet. (See Figure F.)
7. Keep the Grinder in an area
out of reach of children and
other unauthorized people.
REV 11a

SKU 94071 For technical questions, please call 1-800-444-3353 PAGE 11
INSPECTION, MAINTENANCE,
AND CLEANING
1. WARNING! Turn the Grinder’s
Power Switch to its “OFF”
position and unplug the tool
from its electrical outlet before
performing any inspection,
maintenance, or cleaning.
2. Before each use: Inspect the
general condition of the Grinder.
Check for misalignment or binding
of moving parts, loose, cracked or
broken parts, damaged Power Cord,
and any other condition that may
affect its safe operation. If a problem
occurs with the Grinder, have the
problem corrected before further use.
Do not use damaged equipment.
3. To install a Bufng Wheel:
Note: Use both Wrenches
when installing and removing
Buffer and Grinding Wheels.
a. Remove the Left Safety Guard
Cover from the Grinder by
unscrewing and removing Hex Nut.
IMPORTANT: The Hex Nut on the
Bufng Wheel is a LEFT threaded
Hex Nut. To remove, turn the Hex
Nut clockwise. To tighten, turn
the Hex Nut counterclockwise.
b. Remove the Left Safety Guard
Cover. Remove the Outside
Flange and Wheel Bushing.
c. Remove the old Bufng Wheel.
Install the new Bufng Wheel.
d. Replace the Wheel Bushing,
Flange, Left Safety Guard Cover,
Hex Nut, and Seal Ring.
4. To install a Grinding Wheel:
a. Remove the Right Safety Guard
Cover from the Grinder by
unscrewing and removng Hex Nut.
IMPORTANT: The Hex Nut on
the Grinding Wheel is a RIGHT
threaded Hex Nut. To remove, turn
the Hex Nut counterclockwise. To
tighten, turn the Hex Nut clockwise.
b. Remove the Right Safety Guard
Cover. Remove the Outer
Flange and Wheel Bushing.
c. Remove the old Grinding Wheel.
Install the new Grinding Wheel.
Do not overtighten the
Hex Nut. Excessive tightening
can cause the Grinding Wheel
to crack during operation.
d. Replace the Wheel Bushing,
Flange, Right Safety Guard
Cover and Hex Nut.
5. CAUTION! When replacing
the Bufng Wheel and/or Grinding
Wheel, make sure each wheel has
a minimum 3500 RPM rating.
6. To clean: Wipe with a damp cloth,
vacuum or use compressed air.
Do not use solvents. Do not immerse
any part of the Grinder in liquids.
7. When storing: Store the Grinder
in a safe, clean, dry, location
out of reach of children and
other unauthorized people.
8. CAUTION! All maintenance,
service, or repairs not listed in this
manual are only to be attempted
by a qualied service technician.
REV 11a

SKU 94071 For technical questions, please call 1-800-444-3353 PAGE 12
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY
DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER OR
DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT
HE OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT, OR THAT HE OR SHE IS
QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/OR
DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE
UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS, AND NOT BY THE BUYER. THE BUYER
ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL
PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING OUT OF HIS OR HER INSTALLATION
OF REPLACEMENT PARTS THERETO.
PARTS LIST
Part Description Qty.
1 Spring / Flat Washer Assembly 9
2 Left Safty Guard Cover 1
3 Hex Nut 1
4 Outside Flange 2
5 Wheel Bushing 2
6Bufng Wheel 1
7 Inside Flange 2
8 Spacer 2
9 Grinding Wheel 1
10 Hex Nut 1
11 Right Safty Guard Cover 1
12 Right Safty Guard 1
13 Spring / Flat Washer Assembly 6
14 Screw 1
15 Flat Washer 3
16 Eyeshield Mount Rod 1
17 Right Movable Work Rest 1
18 Eyeshield 1
19 Hex Nut 1
20 Switch 1
Part Description Qty.
21 Stator 1
22 Clamp Washer 2
23 Rotor 1
24 Lock Washer 1
25 Wave Spring Washer 1
26 Bearing 2
27 Left Safety Guard 1
28 Left Movable Tool Rest 1
29 Locked Knob Assembly 2
30 Cord / Plug 1
31 Wire Clamp 1
32 Base 1
33 Capacitor 1
34 Screw 1
35 Base Plate 1
36 Rubber foot 4
37 Screw / Flat washer assembly 2
38 Cord Bushing 1
39 Wrench 1
Record Product’s Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Note: Some parts are listed and shown for illustration purposes only,
and are not available individually as replacement parts. REV 11a

SKU 94071 For technical questions, please call 1-800-444-3353 PAGE 13
ASSEMBLY DIAGRAM
REV 11a

SKU 94071 For technical questions, please call 1-800-444-3353 PAGE 14
LIMITED 90 DAY WARRANTY
Harbor Freight Tools Co. makes every
effort to assure that its products meet
high quality and durability standards, and
warrants to the original purchaser that this
product is free from defects in materials
and workmanship for the period of 90 days
from the date of purchase. This warranty
does not apply to damage due directly or
indirectly, to misuse, abuse, negligence or
accidents, repairs or alterations outside
our facilities, criminal activity, improper
installation, normal wear and tear, or to
lack of maintenance. We shall in no event
be liable for death, injuries to persons
or property, or for incidental, contingent,
special or consequential damages arising
from the use of our product. Some states
do not allow the exclusion or limitation
of incidental or consequential damages,
so the above limitation of exclusion may
not apply to you. THIS WARRANTY IS
EXPRESSLY IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING THE WARRANTIES OF
MERCHANTABILITY AND FITNESS.
To take advantage of this warranty,
the product or part must be returned to
us with transportation charges prepaid.
Proof of purchase date and an explanation
of the complaint must accompany the
merchandise. If our inspection veries
the defect, we will either repair or replace
the product at our election or we may
elect to refund the purchase price if
we cannot readily and quickly provide
you with a replacement. We will return
repaired products at our expense, but if
we determine there is no defect, or that
the defect resulted from causes not within
the scope of our warranty, then you must
bear the cost of returning the product.
This warranty gives you specic
legal rights and you may also have other
rights which vary from state to state.
3491 Mission Oaks Blvd. •
PO Box 6009 • Camarillo, CA
93011 • [phone]