3” MINI TOOL GRINDER
Model 94071
ASSEMBLY AND OPERATING INSTRUCTIONS
®
3491 Mission Oaks Blvd., Camarillo, CA 93011
TO PREVENT SERIOUS INJURY,
READ AND UNDERSTAND ALL WARNINGS
AND INSTRUCTIONS BEFORE USE.
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.
For technical questions, please call 1-800-444-3353.
3.
4.
Keep bystanders, children, and visitors away while operating a power tool.
Distractions can cause you to lose control. Protect others in the work area from
debris such as chips and sparks. Provide barriers or shields as needed.
ELECTRICAL SAFETY
Grounded tools must be plugged into an outlet properly installed and
grounded in accordance with all codes and ordinances. Never remove the
grounding prong or modify the plug in any way. Do not use any adapter
plugs. Check with a qualified electrician if you are in doubt as to whether
the outlet is properly grounded. If the tools should electrically malfunction or
break down, grounding provides a low resistance path to carry electricity away
from the user.
5.
6.
Double insulated tools are equipped with a polarized plug (one blade is
wider than the other). This plug will fit in a polarized outlet only one way. If
the plug does not fit fully in the outlet, reverse the plug. If it still does not
fit, contact a qualified electrician to install a polarized outlet. Do not
change the plug in any way. Double insulation
eliminates the need for the
three wire grounded power cord and grounded power supply system.
Avoid body contact with grounded surfaces such as pipes, radiators,
ranges, and refrigerators. There is an increased risk of electric shock if your
body is grounded.
7.
8.
Do not expose power tools to rain or wet conditions. Water entering a power
tool will increase the risk of electric shock.
Do not abuse the Power Cord. Never use the Power Cord to carry the tools
or pull the Plug from an outlet. Keep the Power Cord away from heat, oil,
sharp edges, or moving parts. Replace damaged Power Cords immediately.
Damaged Power Cords increase the risk of electric shock.
9.
When operating a power tool outside, use an outdoor extension cord
marked “W-A” or “W”. These extension cords are rated for outdoor use, and
reduce the risk of electric shock.
PERSONAL SAFETY
10.
Stay alert. Watch what you are doing, and use common sense when
operating a power tool. Do not use a power tool while tired or under the
influence of drugs, alcohol, or medication. A moment of inattention while
operating power tools may result in serious personal injury.
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PAGE 3
11.
12.
13.
14.
15.
Dress properly. Do not wear loose clothing or jewelry. Contain long hair.
Keep your hair, clothing, and gloves away from moving parts. Loose
clothes, jewelry, or long hair can be caught in moving parts.
Avoid accidental starting. Be sure the Power Switch is off before plugging
in. Carrying power tools with your finger on the Power Switch, or plugging in
power tools with the Power Switch on, invites accidents.
Remove adjusting keys or wrenches before turning the power tool on. A
wrench or a key that is left attached to a rotating part of the power tool may result
in personal injury.
Do not overreach. Keep proper footing and balance at all times. Proper
footing and balance enables better control of the power tool in unexpected
situations.
Use safety equipment. Always wear eye protection. Dust mask, nonskid
safety shoes, hard hat, or hearing protection must be used for appropriate
conditions.
TOOL USE AND CARE
16.
17.
Do not force the tool. Use the correct tool for your application. The correct
tool will do the job better and safer at the rate for which it is designed.
Do not use the power tool if the Power Switch does not turn it on or off.
Any tool that cannot be controlled with the Power Switch is dangerous and must
be replaced.
18.
Disconnect the Power Cord Plug from the power source before making any
adjustments, changing accessories, or storing the tool. Such preventive
safety measures reduce the risk of starting the tool accidentally.
19.
20.
Store idle tools out of reach of children and other untrained persons. Tools
are dangerous in the hands of untrained users.
Maintain tools with care. Keep cutting tools sharp and clean. Properly
maintained tools with a sharp cutting edge are less likely to bind and are easier
to control. Do not use a damaged tool. Tag damaged tools “Do not use” until
repaired.
SKU 94071
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PAGE 4
21.
22.
Check for misalignment or binding of moving parts, breakage of parts, and
any other condition that may affect the tool’s operation. If damaged, have
the tool serviced before using. Many accidents are caused by poorly
maintained tools.
Use only accessories that are recommended by the manufacturer for your
model. Accessories that may be suitable for one tool may become hazardous
when used on another tool.
SERVICE
23.
24.
Tool service must be performed only by qualified repair personnel. Service
or maintenance performed by unqualified personnel could result in a risk of injury.
When servicing a tool, use only identical replacement parts. Follow
instructions in the “Inspection, Maintenance, And Cleaning”section of this
manual. Use of unauthorized parts or failure to follow maintenance instructions
may create a risk of electric shock or injury.
SPECIFIC SAFETY RULES
1.
2.
Avoid serious eye injury. ALWAYS wear ANSI-approved safety impact eye
glasses underneath an ANSI-approved safety impact full face shield when
operating the Grinder.
Dress safely. Do not wear loose clothing or jewelry as they can become caught
in moving parts. Wear a protective hair covering to prevent long hair from
becoming caught in moving parts. If wearing long-sleeve shirt, roll sleeves up
above the elbows.
3.
4.
Make sure the Power Switch (7) is in its “OFF” position before plugging the
Power Cord/Plug (13) into an electrical outlet.
Do not abuse the Power Cord/Plug (13). Do not pull the Power Cord to
disconnect the Plug from an electrical outlet. Do not move the Grinder with the
Power Cord/Plug in the outlet. Keep the Power Cord/Plug away from heat, oil,
sharp, edges, and its own Buffing Wheel (39) and Grinding Wheel (40).
5.
6.
Never leave the Grinder unattended while it is running. Always turn off the
tool, unplug the tool from its electrical outlet, and wait until its wheels stop
rotating before leaving the area.
Never use the sides of the Grinding Wheel (40) to grind objects.
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PAGE 5
7.
8.
Keep all Guards in place and in proper working order.
Remove adjusting keys and wrenches. Check to make sure all adjusting keys
and wrenches are removed from this tool before turning it on.
9.
Never attempt to remove material stuck in the moving parts of the Grinder
while the tool is turned on, plugged in, or running.
10.
Use light pressure when starting to grind. Too much pressure on a cold
Grinding Wheel (40) can cause the wheel to crack.
11.
12.
When replacing the Buffing Wheel (39) and/or Grinding Wheel (40), make
sure each wheel has a minimum 3500 RPM rating.
When replacing the Grinding Wheel (40), do not overtighten the Hex Nut
(41). Excessive tightening can cause the Grinding Wheel to crack during
operation. Be sure to reassemble all Flanges (37).
13.
14.
Adjust the distance between the Buffing Wheel (39)/ Grinding Wheel (40)
and MoveableTool Rest (5) to maintain a 1/16” or less separation as the
diameter of the wheels decrease with use.
Turn off the Grinder, unplug its Power Cord/Plug (13) from its 120 volt,
grounded, electrical outlet, and allow the tool to completely stop prior
to performing any inspection, maintenance, or cleaning on the unit.
15.
16.
Use the right tool or attachment for the job. Do not attempt to force a small
tool or attachment to do the work of a larger industrial tool. There are certain
applications for which this product was designed. It will do the job better and
more safely at the rate for which it was intended. Do not modify this product,
and do not use this product for a purpose for which it was not intended.
WARNING! Some dust created by power sanding, sawing, grinding,
drilling, and other construction activities, contain 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 varies, 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.
(California Health & Safety Code 25249.5, et seq.)
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PAGE 6
17.
18.
Industrial applications must follow OSHA requirements.
Maintain labels and nameplates on the Grinder. These carry important
information. If unreadable or missing, contact Harbor Freight Tools for a
replacement.
19.
20.
WARNING! People with pacemakers should consult their physician(s)
before using this product. Operation of electrical equipment in close proximity to
a heart pacemaker could cause interference or failure of the pacemaker.
WARNING! The warnings, precautions, and instructions discussed in this
manual cannot cover all possible conditions and situations that may occur. The
operator must understand that common sense and caution are factors which
cannot be built into this product, but must be supplied by the operator.
SAVETHESE INSTRUCTIONS
GROUNDING
WARNING!
Improperly connecting the grounding wire can result in the risk of electric shock.
Check with a qualified electrician if you are in doubt as to whether the outlet is
properly grounded. Do not modify the power cord plug provided with the tool. Never
remove the grounding prong from the plug. Do not use the tool if the power cord or
plug is damaged. If damaged, have it repaired by a service facility before use. If the
plug will not fit the outlet, have a proper outlet installed by a qualified electrician.
GROUNDEDTOOLS:TOOLSWITH THREE PRONG PLUGS
1.
2.
Tools marked with “Grounding Required” have a three wire cord and three prong
grounding plug. The plug must be connected to a properly grounded outlet. If
the tool should electrically malfunction or break down, grounding provides a low
resistance path to carry electricity away from the user, reducing the risk of electric
shock. (See Figure A, next page.)
The grounding prong in the plug is connected through the green wire inside the
cord to the grounding system in the tool. The green wire in the cord must be the
only wire connected to the tool’s grounding system and must never be attached
to an electrically “live” terminal. (See Figure A.)
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PAGE 7
3.
Your tool must be plugged into an appropriate outlet, properly installed and
grounded in accordance with all codes and ordinances. The plug and outlet
should look like those in the following illustration. (See Figure A.)
THIS
PRODUCT
USES A
3-PRONG PLUG
FIGURE A
DOUBLE INSULATED TOOLS:TOOLS WITH TWO PRONG PLUGS
4.
5.
Tools marked “Double Insulated” do not require grounding. They have a special
double insulation system which satisfies OSHA requirements and complies with
the applicable standards of Underwriters Laboratories, Inc., the Canadian
Standard Association, and the National Electrical Code. (See Figure B.)
Double insulated tools may be used in either of the 120 volt outlets shown in the
following illustration. (See Figure B.)
FIGURE B
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PAGE 8
EXTENSION CORDS
1.
2.
Grounded tools require a three wire extension cord. Double Insulated tools
can use either a two or three wire extension cord.
As the distance from the supply outlet increases, you must use a heavier gauge
extension cord. Using extension cords with inadequately sized wire causes a
serious drop in voltage, resulting in loss of power and possible tool damage.
(See Figure C.)
3.
The smaller the gauge number of the wire, the greater the capacity of the cord.
For example, a 14 gauge cord can carry a higher current than a 16 gauge cord.
(See Figure C.)
4.
5.
If using more than one extension cord to make up the total length, make sure
each cord contains at least the minimum wire size required. (See Figure C.)
If you are using one extension cord for more than one tool, add the nameplate
amperes and use the sum to determine the required minimum cord size.
(See Figure C.)
6.
7.
If you are using an extension cord outdoors, make sure it is marked with the suffix
“W-A” (“W” in Canada) to indicate it is acceptable for outdoor use.
Make sure your extension cord is properly wired and in good electrical condition.
Always replace a damaged extension cord or have it repaired by a qualified
electrician before using it.
8.
Protect your extension cords from sharp objects, excessive heat, and damp or
wet areas.
RECOMMENDED MINIMUM WIRE GAUGE FOR EXTENSION CORDS*
(120 VOLT)
NAMEPLATE
EXTENSION CORD LENGTH
AMPERES
(At Full Load)
25
Feet
18
18
18
18
18
14
12
50
Feet
18
18
18
16
14
12
75
Feet
18
18
16
14
12
10
-
100
Feet
18
16
14
12
10
-
150
Feet
16
14
12
12
-
0 – 2.0
2.1 – 3.4
3.5 – 5.0
5.1 – 7.0
7.1 – 12.0
12.1 – 16.0
16.1 – 20.0
-
-
10
-
* Based on limiting the line voltage drop
to five volts at 150% of the rated amperes.
FIGURE C
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PAGE 9
SYMBOLOGY
Double Insulated
Canadian Standards
Association
Underwriters
Laboratories, Inc.
Volts Alternating Current
V ~
A
Amperes
n
No Load Revolutions
per Minute (RPM)
o
FIGURE D
xxxx/min.
UNPACKING
When unpacking, check to make sure all the parts shown on the Parts List on page 14
are included. If any parts are missing or broken, please call Harbor Freight Tools at the
number shown on the cover of this manual as soon as possible.
ASSEMBLY INSTRUCTIONS
1.
WARNING! Make sure the Power Switch (7) of the Grinder is in its
“OFF” position and its Power Cord/Plug (13) is unplugged from the
electrical outlet prior to performing any assembly.
To AttachThe Right MoveableTool Rest:
1.
The left Moveable Tool Rest (5) has been pre-attached by the manufacturer.
However, the right Moveable Tool Rest (5) must be attached by the operator prior
to using the Grinder. (See Figure E, next page.)
2.
To attach the right Moveable Tool Rest (5), insert its mounting slot onto the
protruding, threaded, Bolt located on the front of the Grinder. Then, secure the
Moveable Tool Rest, using the Wing Nut (6). IMPORTANT: Make sure to adjust
the distance between the MoveableTool Rest and Grinding Wheel (40)
to a 1/16” or less separation. (See Figure E.)
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To AttachThe Spark Shields:
1.
A Spark Shield (20) must be attached to both the Left
Safety Guard Plate (17) and Right Safety Guard Plate
(32).
2.
To do so, for each Spark Shield use two Philips Screws
(18), two Flat Washers (19), two Spring Washers (22),
and two Hex Nuts (21). Be sure to orient it as shown in
the illustration to the right. (See also Figure E, below.)
RIGHT
SAFETY
GUARD PLATE
(32)
PHILIPS SCREW
LEFT
SAFETY
GUARD PLATE
(17)
(18)
FLAT WASHER
(19)
SPARK SHIELD
(20)
SPRING WASHER
(22)
HEX NUT
(21)
MOVEABLE TOOL REST
(5)
OFF
ON
FIGURE E
WING NUT
(6)
To MountThe Grinder On A Workbench:
1.
CAUTION! Make sure the workbench on which the Grinder will be mounted
is flat, level, and sturdy enough to support the weight of the Grinder, any work-
pieces, and any additional tools.
2.
The Grinder is equipped with four Rubber Feet (3) 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.
(See Assy. Diagram.)
3.
4.
To permanently mount the Grinder on a workbench, remove the Rubber Feet (3)
and place the Grinder in the desired work location on the workbench. Use the
four mounting holes at the Base (4) as a template to mark the areas where four
3/16” diameter mounting holes should be drilled through the workbench.
Temporarily remove the Grinder, and drill the four 3/16” diameter mounting holes
REV 03/06
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PAGE 11
through the workbench, making sure no hidden electric cords or cables are in the
drilling path.
5.
Once the 3/16” mounting holes are drilled, align the four mounting holes at the
Base (4) 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). (See Assy. Diagram.)
OPERATING INSTRUCTIONS
1.
2.
Connect the Power Cord/Plug (13) of the Grinder to the nearest 120 volt,
grounded, electrical outlet. (See Figure F.)
WARNING! ALWAYS wear ANSI-approved safety impact eye
glasses underneath an ANSI-approved safety impact full face shield when operat-
ing the Grinder.
3.
4.
Turn the Power Switch (7) to its “ON” position, and allow the Buffing Wheel (39)
and Grinding Wheel (40) to spin up to full speed. (See Figure F.)
Place the object you are buffing or grinding firmly against the Moveable Tool Rest
(5), and slowly feed the object into the revolving Buffing Wheel (39) or Grinding
Wheel (40). (See Figure F.)
5.
CAUTION! Make sure to keep hands and fingers away from the Buffing
Wheel (39) and Grinding Wheel (40). Also, make sure to hold the object you are
buffing or grinding firmly against the Moveable Tool Rest (5) throughout the buff-
ing/grinding process. Failure to do so may cause the object to be propelled by
the Buffing Wheel or Grinding Wheel toward your body and/or into the Grinder.
(See Figure F.)
FIGURE F
BUFFING WHEEL
(39)
GRINDING WHEEL
(40)
MOVEABLE
TOOL REST
(5)
OFF
ON
POWER CORD/PLUG
(13)
POWER SWITCH
(7)
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PAGE 12
6.
7.
Once the grinding process is competed, turn the Power Switch (7) of the Grinder
to its “OFF” position. Do not press against the Buffing Wheel (39) or Grinding
Wheel (40) to stop them from spinning. Allow the Wheels to completely stop on
their own. Then, disconnect the Power Cord/Plug (13) from its electrical
outlet. (See Figure F.)
Always make sure the Grinder is kept in an area out of reach of children and
other unauthorized people.
INSPECTION, MAINTENANCE, AND CLEANING
1.
2.
WARNING! Always turn the Grinder’s Power Switch (7) to its “OFF”
position and unplug the tool from its electrical outlet before performing any
inspection, maintenance, or cleaning.
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 Buffing Wheel (39): Note: Use both Spanner Wrenches when
installing and removing Buffer and Grinding Wheels. To install a new Buffing
Wheel (39), remove the Seal Ring (34) from the Grinder. Unscrew and remove
the Hex Nut (36). IMPORTANT: The Hex Nut on the Buffing Wheel is a LEFT
threaded Hex Nut. To remove, turn the Hex Nut clockwise. To tighten, turn the
Hex Nut counterclockwise. Remove the Left Safety Guard Cover (35). Remove
the Flange (37) and Shaft Sleeve (38). Then, remove the old Buffing Wheel.
Install the new Buffing Wheel. Then, replace the Shaft Sleeve, Flange, Left
Safety Guard Cover, Hex Nut, and Seal Ring. (See Assy. Diagram.)
4.
5.
To install a Grinding Wheel (40): To install a new Grinding Wheel (40), remove
the Seal Ring (34) from the Grinder. Unscrew and remove the Hex Nut (41).
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. Remove the Right Safety Guard Cover (42). Remove the Flange (37)
and Shaft Sleeve (38). Then, remove the old Grinding Wheel. Install the new
Grinding Wheel. Then, replace the Shaft Sleeve, Flange, Right Safety Guard
Cover, Hex Nut, and Seal Ring. (See Assy. Diagram.)
CAUTION! When replacing the Buffing Wheel (39) and/or Grinding Wheel
(40), make sure each wheel has a minimum 3500 RPM rating. When replacing
the Grinding Wheel (40), do not overtighten the Hex Nut (41). Excessive
tightening can cause the Grinding Wheel to crack during operation.
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PAGE 13
6.
7.
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.
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 qualified service technician.
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
Philips Screw (ST2.9x5)
Base Plate
Rubber Foot
Base
Moveable Tool Rest
Wing Nut
Power Switch
Switch Cover
Philips Screw (ST3.9x12)
Capacitor
Qty.
Part #
24
Description
Left End Cap
Spring Wave Washer (D19)
Bearing
Philips Screw (M3x5)
Star Washer (D3)
Stator
Qty.
1
2
3
4
5
6
7
8
9
4
1
1
2
6
7
1
1
1
1
2
2
1
1
4
2
1
1
1
1
1
1
2
1
4
1
2
2
1
1
4
1
1
2
1
2
4
2
1
4
4
2
4
4
2
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
Rotor
Right End Cap
Right Safety Guard Plate
Spring Washer (D4)
Seal Ring
Left Safety Guard Cover
Hex Nut (IM6 Left)
Flange
Shaft Sleeve
Buffing Wheel
Grinding Wheel
Hex Nut (IM6)
Right Safety Guard Cover
Cord Bushing
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Philips Screw (M3x4)
Hex Nut (IM4)
Power Cord/Plug
Philips Screw (M4x87)
Star Washer (D4)
Flat Washer (D4)
Left Safety Guard Plate
Philips Screw (M5x12)
Flat Washer (D5)
Spark Shield
Hex Nut (IM5)
Spring Washer
Collar
Philips Screw (ST4.2x10)
Spanner
NOTE:
Some parts are listed and shown for illustration purposes only,
and are not available individually as replacement parts.
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PAGE 14
ASSEMBLY DIAGRAM
27
28
34
37
38
40
37
42
41
37
39
38
12
22
27
28
33
37
21
36
32
9
35
31
23
26
15
34
30
20
19
29
18
26
21
22
24
25
23
17
43
28
11
20
19
9
10
44
18
15
16
13
14
7
4
2
8
6
5
1
45: SPANNERS NOT SHOWN
3
NOTE:
Some parts are listed and shown for illustration purposes only,
and are not available individually as replacement parts.
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PAGE 15
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