WARNING: To reduce the risk of injury, the user must
read and understand the operator's manual before
using this product.
Customer Help Line: 1-800-932-3188
Sears, Roebuck and Co., 3333 Beverly Rd., Hoffman Estates, IL 60179 USA
Visit the Craftsman Web page: www.sears.com/craftsman
■Exploded View and Repair Parts List ................................................................................................................ 14-15
■Customer Service Information................................................................................................................................ 16
WARRANTY
FULL ONE YEAR WARRANTY ON CRAFTSMAN PROFESSIONAL ROTARY GRINDER
If this tool fails due to a defect in material or workmanship within one year from the date of purchase,
Sears will repair it, free of charge.
WARRANTY SERVICE IS AVAILABLE BY SIMPLY RETURNING THE TOOL TO THE NEAREST SEARS STORE
OR SEARS SERVICE CENTER IN THE UNITED STATES.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
Sears, Roebuck and Co., Dept. 817WA, Hoffman Estates, IL 60179
INTRODUCTION
Your rotary grinder has many features for making the
use of this product more pleasant and enjoyable.
Safety, performance, and dependability have been
given top priority in the design of this product making it
easy to maintain and operate.
Look for this symbol to point out important safety precautions. It means attention!!!
Your safety is involved.
WARNING: Do not attempt to use this product
until you read thoroughly and understand
completely the operator’s manual. Pay close
attention to the safety rules, including Dangers,
Warnings, and Cautions. If you use this product
properly and only as intended, you will enjoy years
of safe, reliable service.
WARNING:
The operation of any tool can result in foreign objects being thrown into your eyes, which can result in
severe eye damage. Before beginning operation, always wear safety goggles or safety glasses with
side shields and a full face shield when needed. We recommend Wide Vision Safety Mask for use
over eyeglasses or standard safety glasses with side shields. Always wear eye protection which is
marked to comply with ANSI Z87.1.
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Page 3
GENERAL SAFETY RULES
WARNING: Read and understand all
instructions. Failure to follow all instructions listed
below, may result in electric shock, fire and/or
serious personal injury.
SAVE THESE INSTRUCTIONS
WORK AREA
■Keep your work area clean and well lit. Cluttered
benches and dark areas invite accidents.
■Do not operate power tools in explosive atmospheres, such as in the presence of flammable
liquids, gases, or dust. Power tools may create
sparks which may ignite the dust or fumes.
■Keep bystanders, children, and visitors away
while operating a power tool. Distractions can
cause you to lose control.
ELECTRICAL SAFETY
■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.
■Don’t expose power tools to rain or wet conditions.
Water entering a power tool will increase the risk of
electric shock.
■Do not abuse the cord. Never use the cord to carry
the tools or pull the plug from an outlet. Keep cord
away from heat, oil, sharp edges, or moving parts.
Replace damaged cords immediately. Damaged
cords increase the risk of electric shock.
■When operating a power tool outside, use an outdoor extension cord marked “W-A” or “W”. These
cords are rated for outdoor use and reduce the risk of
electric shock.
PERSONAL SAFETY
■Stay alert, watch what you are doing and use
common sense when operating a power tool. Do
not use 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.
■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 switch is off
before plugging in. Carrying tools with your finger
on the switch or plugging in tools that have the
switch on, invites accidents.
■Remove adjusting keys or wrenches before
turning the tool on. A wrench or a key that is left
attached to a rotating part of the 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 tool in unexpected
situations. Do not use on a ladder or unstable
support.
■Use safety equipment. Always wear eye protection. Dust mask, non-skid safety shoes, hard hat, or
hearing protection must be used for appropriate
conditions.
TOOL USE AND CARE
■Use clamps or other practical way to secure and
support the workpiece to a stable platform.
Holding the work by hand or against your body is
unstable and may lead to loss of control.
■Do not force 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 tool if switch does not turn it on or
off. Any tool that cannot be controlled with the switch
is dangerous and must be repaired.
■Disconnect the plug from power source before
making any adjustments, changing accessories,
or storing the tool. Such preventive safety mea-
sures reduce the risk of starting the tool accidentally.
■Store idle tools out of the 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
sharp cutting edges are less likely to bind and are
easier to control.
■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 acci-
dents 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.
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Page 4
GENERAL SAFETY RULES
SERVICE
■Tool service must be performed only by qualified
repair personnel. Service or maintenance per-
formed by unqualified personnel could result in a risk
of injury.
SPECIFIC SAFETY RULES
■Always use proper guard with grinding wheel. A
guard protects operator from broken wheel fragments.
■Accessories must be rated for at least the speed
recommended on the tool warning label. Wheels
and other accessories running over rated speed can
fly apart and cause injury.
ADDITIONAL SAFETY RULES
■Know your power tool. Read operator’s manual
carefully. Learn its applications and limitations,
as well as the specific potential hazards related
to this tool. Following this rule will reduce the risk of
electric shock, fire, or serious injury.
■Always wear safety glasses. Everyday eyeglasses have only impact-resistant lenses; they
are NOT safety glasses. Following this rule will
reduce the risk of serious personal injury.
■Protect your lungs. Wear a face or dust mask if
the operation is dusty. Following this rule will
reduce the risk of serious personal injury.
■Protect your hearing. Wear hearing protection
during extended periods of operation. Following
this rule will reduce the risk of serious personal
injury.
■Inspect tool cords periodically and, if damaged,
have repaired at your nearest authorized service
center. Constantly stay aware of cord location.
Following this rule will reduce the risk of electric
shock or fire.
■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 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 by an authorized service center. Following
this rule will reduce the risk of shock, fire, or serious
injury.
■When servicing a tool, use only identical replacement parts. Follow instructions in the Maintenance section of this manual. Use of unauthorized
parts or failure to follow Maintenance Instructions
may create a risk of electric shock or injury.
■Hold tool by insulated gripping surfaces when
performing an operation where the tool may
contact hidden wiring or its own cord. Contact
with a “live” wire will make exposed metal parts of
the tool “live” and shock the operator.
■Do not abuse cord. Never carry the tool by the
cord or yank it to disconnect it from the receptacle. Keep cord away from heat, oil, and sharp
edges. Following this rule will reduce the risk of
electric shock or fire.
■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. A wire gage size (A.W.G.) of at
least 16 is recommended for an extension cord
100 feet or less in length. A cord exceeding 100
feet is not recommended. If in doubt, use the
next heavier gage. The smaller the gage number,
the heavier the cord. An undersized cord will cause
a drop in line voltage resulting in loss of power and
overheating.
■Inspect for and remove all nails from lumber
before using this tool. Following this rule will
reduce the risk of serious personal injury.
■Drugs, alcohol, medication. Do not operate tool
while under the influence of drugs, alcohol, or
any medication. Following this rule will reduce the
risk of electric shock, fire, or serious personal injury.
■Save these instructions. Refer to them frequently
and use them to instruct others who may use
this tool. If you loan someone this tool, loan
them these instructions also.
SAVE THESE INSTRUCTIONS
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Page 5
SYMBOLS
Important: Some of the following symbols may be used on your tool. Please study them and learn their meaning.
Proper interpretation of these symbols will allow you to operate the tool better and safer.
SYMBOLNAMEDESIGNATION/EXPLANATION
VVoltsVoltage
AAmperesCurrent
HzHertzFrequency (cycles per second)
WWattPower
minMinutesTime
Alternating CurrentType of current
n
0
.../minPer MinuteRevolutions, strokes, surface speed, orbits etc., per minute
The purpose of safety symbols is to attract your attention to possible dangers. The safety symbols, and the
explanations with them, deserve your careful attention and understanding. The safety warnings do not by themselves
eliminate any danger. The instructions or warnings they give are not substitutes for proper accident prevention
measures.
No Load SpeedRotational speed, at no load
Class II ConstructionDouble-insulated construction
Safety AlertPrecautions that involve your safety
Eye ProtectionAlways wear safety goggles or safety glasses with side shields
and a full face shield when operating this product.
Wet Conditions AlertDo not expose to rain or use in damp locations.
SYMBOLMEANING
DANGER: Indicates an imminently hazardous situation, which, if not avoided, will result in death or
serious injury.
WARNING: Indicates a potentially hazardous situation, which, if not avoided, could result in death or
serious injury.
CAUTION: 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 that may cause property damage.
Important: Advises you of important information or instructions vital to the operation or maintenance of
the equipment.
Note: Advises you of additional information concerning the operation or maintenance of the equipment.
5
Page 6
SPECIFICATIONS
Collet ....................................................... 1/4 in. (6.4 mm)
Collet Adaptor .........................................1/8 in. (3.2 mm)
Input .......................120 Volts, 60 Hz, AC only, 2.5 Amps
ELECTRICAL
DOUBLE INSULATION
Double insulation is a concept in safety in electric power
tools, which eliminates the need for the usual three-wire
grounded power cord. All exposed metal parts are
isolated from the internal metal motor components with
protecting insulation. Double insulated tools do not need
to be grounded.
Important: Servicing of a tool with double insulation
requires extreme care and knowledge of the system and
should be performed only by a qualified service
technician. For service, we suggest you return the tool
to your nearest authorized service center for repair.
When servicing, use only identical Craftsman
replacement parts.
WARNING: The double insulated system is
intended to protect the user from shock resulting
from a break in the tool's internal wiring. Observe
all normal safety precautions to avoid electrical
shock.
ELECTRICAL CONNECTION
The rotary grinder has a precision built electric motor. It
should be connected to a power supply that is 120
volts, 60 Hz, AC only (normal household current).
Do not operate this tool on direct current (DC). A
substantial voltage drop will cause a loss of power and
the motor will overheat. If your tool does not operate
when plugged into an outlet, double-check the power
supply.
No Load Speed .............................................. 26,500/min
Net Weight ......................................................... 3.25 lbs.
EXTENSION CORDS
The use of any extension cord will cause some loss of
power. To keep the loss to a minimum and to prevent
tool overheating, use an extension cord that is heavy
enough to carry the current the tool will draw.
A wire gage size (A.W.G.) of at least 16 is
recommended for an extension cord 100 feet or less in
length. When working outdoors, use an extension cord
that is suitable for outdoor use. This type of cord is
designated with "WA" on the cord's jacket.
CAUTION: Keep extension cords clear of the
working area. While you are working with a power
tool, position the cord so that it will not get caught
on lumber, tools, or other obstructions.
WARNING: Check extension cords before each
use. If damaged, replace them immediately. Never
use a damaged cord with this tool. Touching the
damaged area could cause serious injury due to
electrical shock.
Extension cords suitable for use with your tool are
available at your nearest Sears retail store.
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Page 7
UNPACKING
INSTRUCTIONS
Your rotary grinder has been shipped completely
assembled.
■Carefully remove the tool and the accessories from
the box.
■Make sure that all items listed in the packing list are
included.
■Inspect the tool carefully to be sure no breakage or
damage occurred during shipping.
■Do not discard the packing material until you have
carefully inspected and satisfactorily operated the
tool.
■If any parts are damaged or missing, please call
1-800-932-3188 for assistance.
APPLICATIONS
You may use the rotary grinder for the purposes listed
below:
ApplicationBit Type
PACKING LIST
Rotary Grinder
Collet Adaptor
Wrench
Operator’s Manual
WARNING: If any parts are missing, do not
operate your tool until the missing parts are
replaced. Failure to do so could result in serious
personal injury.
WARNING: The grinder should never be
connected to a power supply when you are
assembling parts, making adjustments, cleaning,
performing maintenance, or when the tool is not in
use. Disconnecting the tool prevents accidental
starting that could cause serious injury.
Removing burrs/smoothing metals Fine-grit stones
Removing rustFine-grit stones
Sharpening lawn mower bladesCourse-grit stones
Milling soft metalsRotary files
WARNING: Some dust created by power sanding,
sawing, grinding, drilling, and other construction
activities contains chemicals known 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 and
other masonry products, and
• 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.
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Page 8
FEATURES
Before using the rotary grinder, familiarize yourself with
all operating features and safety requirements.
However, do not let familiarity with the tool make you
careless.
WARNING: Exercise caution when using the
rotary grinder. Careless actions, for even a fraction
of a second, can result in serious personal injury.
Your new grinder is equipped with the following
features.
See Figure 1.
SWITCH
The grinder is equipped with a conveniently located
switch.
WIRE HANGER
The wire hanger is provided for convenience and ease
of storage.
SPINDLE LOCK
The spindle lock button allows you to secure the spindle
while you make adjustments.
COLLET AND COLLET ADAPTOR
The grinder is equipped with a 1/4 in. (6.4 mm) collet for
receiving 1/4 in. (6.4 mm) diameter bits.
A 1/8 in. (3.2 mm) collet adapter is also included with
the grinder. When placed inside the collet, the collet
adaptor allows the grinder to receive 1/8 in. (3.2 mm)
diameter bits.
GRINDING WHEELS
The maximum diameter grinding wheels recommended
for use with a 1/4 in. (6.4 mm) collet is 1 in. (25.4 mm).
Grinding wheels should only be used when working with
hard materials. Do not use grinding wheels when
working with soft materials, such as nonferrous metals.
Grinding nonferrous metals such as aluminum, brass,
copper, etc. places extra load on the wheel and does
not allow it to cut as designed.
WIRE
HANGER
COLLET
SWITCH
SPINDLE LOCK
BUTTON
COLLET
ADAPTOR
Fig. 1
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Page 9
ADJUSTMENTS
WARNING: The grinder should never be
connected to a power supply when you are
assembling parts, making adjustments, cleaning,
performing maintenance, or when the tool is not in
use. Disconnecting the tool prevents accidental
starting that could cause serious injury.
COLLET
NUT
ATTACHING THE WIRE HANGER
See Figure 2.
Follow these steps to attach the wire hanger.
1. Unplug the grinder.
WARNING: Failure to unplug the tool could result
in serious injury due to accidental starting.
2. Insert the ends of the wire hanger into the holes on
each side of the grinder housing.
WIRE
HANGER
COLLET
ADAPTOR
COLLET
Fig. 3a
SPINDLE LOCK
BUTTON
TO
TIGHTEN
Fig. 2
INSERTING THE COLLET ADAPTOR
See Figures 3a and 3b.
Follow these steps to insert the collet adaptor.
1. Unplug the grinder.
WARNING: Failure to unplug the tool could result
in serious injury due to accidental starting.
2. Depress and hold the spindle lock button.
3. Loosen the collet nut.
4. Insert the collet adaptor into the collet.
5. Tighten the collet nut securely with the wrench provided.
6. Release the spindle lock button.
TO
LOOSEN
Fig. 3b
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Page 10
ADJUSTMENTS
INSERTING BITS
See Figure 4.
Follow these steps to insert bits.
1. Unplug the grinder.
WARNING: Failure to unplug the tool could result
in serious injury due to accidental starting.
2. Depress and hold the spindle lock button.
3. Turn the collet nut until the spindle lock engages the
hole in the shaft.
4. Insert the bit into the collet a minimum of 16 mm
(5/8 in.) to prevent the bit from coming out of the
grinder while in use.
Note: Inserting the bit a minimum of 16 mm (5/8 in.)
into the collet provides a minimum overhang, which
ensures less vibration and better results.
WARNING: Bits separating from the grinder while
in use could cause serious personal injury.
SPINDLE LOCK
BUTTON
COLLET
NUT
BIT
COLLET
Fig. 4
5. Tighten the collet nut securely with the wrench provided.
6. Release the spindle lock button.
Note: Always check the bit for tightness before
each use. A loose bit can be thrown from tool with
considerable force causing injury.
WARNING: Never use grinding wheels rated
below 26,500/min. Wheels rated less than
26,500/min could break while in use, causing
serious injury.
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Page 11
OPERATION
WARNING: Always wear safety goggles or safety
glasses with side shields when operating this tool.
Failure to do so could result in dust, shavings,
chips, loose particles, or foreign objects being
thrown in your eyes resulting in possible serious
injury. If the operation is dusty, also wear a face or
dust mask.
TURNING ON/OFF THE GRINDER
See Figure 5.
Follow these steps to turn on/off the grinder.
■
Turn on the grinder
locks into place.
■
Turn off the grinder
the switch.
—Slide the switch forward until it
—Depress the back (flat area) of
FOWARD TO
TURN ON
SLIDE
WARNING: Baggy clothes and gloves should not
be worn while operating this product. To avoid
possible serious injury, wear snug-fitting clothes.
■For ease of operation and maintaining proper
control, hold the grinder with both hands as shown.
WARNING: Keep hands and fingers away from
the grinding area. Any part of the body coming in
contact with moving parts could cause personal
injury.
WARNING: Do not place hands over air vents.
Proper cooling of the motor is necessary to ensure
normal life of the tool.
■Clamp or otherwise secure the work to prevent it
from shifting.
■Always point the cutter away from your body.
WARNING: Never point the cutter towards you. If
it should slip, part of your body or clothing could
come in contact with moving parts and cause
serious injury.
SWITCH
DEPRESS
TO TURN
OFF
OPERATING THE GRINDER
See Figure 6.
Follow these guidelines when operating the grinder.
■Always allow the grinder to operate as it was
designed. Never force the tool.
WARNING: Avoid excessive pressure on the tool
that can bend or break the collet, resulting in
possible serious injury and poor performance.
If the grinder runs smoothly when not under load,
but does not run smoothly under load, then you are
using excessive pressure.
Pressure between the wheel and the work should
never be heavy enough to cause bending or
springing of the collet. This is of particular
importance when using wheels with small collet
diameters.
Fig. 5
Fig. 6
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Page 12
MAINTENANCE
WARNING:When servicing, use only identical
Craftsman replacement parts. Use of any other
part may create a hazard or cause product
damage.
WARNING: The rotary grindershould never be
connected to a power supply when you are
assembling parts, making adjustments, cleaning,
performing maintenance, or when the tool is not in
use. Disconnecting the tool prevents accidental
starting that could cause serious injury.
GENERAL
Only the parts shown on the parts list are intended to be
repaired or replaced by the customer. All other parts are
an important part of the double insulation system and
should be serviced only by a qualified Sears service
technician.
Avoid using solvents when cleaning plastic parts. Most
plastics are susceptible to damage from various types of
commercial solvents and may be damaged by their use.
Use clean cloths to remove dirt, carbon dust, etc.
WARNING: Do not at any time let brake fluids,
gasoline, petroleum-based products, penetrating
oils, etc. come in contact with plastic parts. They
contain chemicals that can damage, weaken, or
destroy plastic.
REPLACING THE BRUSHES
See Figures 7a, 7b, and 7c.
Replace brushes if worn. Always replace in pairs; do not
replace one brush without replacing the other.
Follow these steps to replace the brushes.
1. Unplug the grinder.
WARNING: Failure to unplug the tool could result
in serious injury due to accidental starting.
2. Remove the brush cap using a flat head screwdriver.
BRUSH CAP
Fig. 7a
Electric tools used on fiberglass material, wallboard,
spackling compounds, or plaster are subject to
accelerated wear and possible premature failure
because the fiberglass chips and grindings are highly
abrasive to bearings, brushes, commutators, etc.
Consequently, we do not recommend using this tool for
extended work on these types of materials. However, if
you do work with any of these materials, it is extremely
important to clean the tool using compressed air.
WARNING: Always wear safety goggles or safety
glasses with side shields during power tool
operation or when blowing dust. If operation is
dusty, also wear a dust mask. Failure to do so
could result in possible serious injury.
LUBRICATION
All the bearings in this tool are lubricated with a
sufficient amount of high grade lubricant for the life of
the tool under normal operating conditions. Therefore,
no further lubrication is required.
Fig. 7b
3. Use the tip of the screwdriver to loosen the brush
assembly.
4. Remove the brush assembly.
5. Replace the brush assembly.
6. Replace the brush cap.
12
BRUSH
ASSEMBLY
Fig. 7c
Page 13
ACCESSORIES
DO NOT EXCEED THESE GRINDING WHEEL SIZES
Plain Wheels
1/4 in. Collet
Wheel Diameter
1 in.
3/4 in.
5/8 in.
With
1 in.
Over
hang
For additional information consult "The Safety Requirements for the Use, Care and Protection of Abrasive Wheels"
ANSI B 7.1. Write "The American National Standards Institute, Inc., 1430 Broadway, New York, New York, 10018.
1/2 in.
3/8 in.
1/8 in. Collet
Wheel Diameter
1 in.
3/4 in.
5/8 in.
1/2 in.
3/8 in.
Wheel Thickness
3/4 in.
1 in.
1 in.
1-1/2 in.
1-1/4 in.
Wheel Thickness
1/8 in.
1/4 in.
1/4 in.
3/8 in.
1/2 in.
Wheel Diameter
1 in.
3/4 in.
11/16 in.
1/2 in.
1/4 in.
Wheel Diameter
1/4 in.
5/8 in.
1/2 in.
3/8 in.
Shaped Wheels
1/4 in. Collet
Wheel Thickness
1 in.
1-1/8 in.
1-1/4 in.
3/4 in.
1-1/16 in.
1/8 in. Collet
Wheel Thickness
1/2 in.
1/2 in.
3/8 in.
1/2 in.
13
Page 14
1
2
19
4
5
1
3
7
8
14
9
16
15
17
13
10
11
12
6
18
CRAFTSMAN ROTARY GRINDER – MODEL NUMBER 315.267560
Note: The assembly shown represents an important part of the double insulated system. To avoid the possi-
bility of alteration or damage to the System, service should be performed by your nearest Sears repair
center. Contact your nearest Sears retail store for service center information.
14
Page 15
CRAFTSMAN ROTARY GRINDER – MODEL NUMBER 315.267560
The model number is on a plate attached to the motor housing. Always mention the model number in all
correspondence regarding your ROTARY GRINDER or when ordering repair parts.