Craftsman 320.39587 User manual

Operator's Manual
®
2.0 Amp 1/4 SHEET SANDER
Model No. 320.39587
°@°,D
LISTED
_WARNING" To reduce the risk of injury,
the user must read and understand the
Operator's Manual before using this product.
* WARRANTY
* SAFETY
* DESCRiPTiON
* ASSEMBLY
*OPERATION
* MAINTENANCE
*ESPANOL
Sears Brands Management Corporation, Hoffman Estates,
IL 60179 U.S.A.
www,craftsman,com

Warranty Page 2
Safety Symbols Pages 4-5
Safety Instructions Pages 6-8
Description Pages 9-10
Assembly Page 11
Operation Pages 12-15
Maintenance Pages 16-17
Troubleshooting Page 17
Parts List Pages 18-19
CRAFTSMAN ONE YEAR LiMiTED WARRANTY
FOR ONE YEAR from the date of purchase, this product is warranted
against any defects in material or workmanship. With proof of purchase,
defective product will be replaced free of charge.
For warranty coverage details to obtain free replacement, visit the web
page: www.craftsrnan.corn/warranty
This warranty does not cover the sandpaper, which is an expendable part
that can wear out from normal use within the warranty period.
This ONE YEAR warranty is void if this product is ever used while providing
commercial services or if rented to another person. For 90 DAY commercial
and rental use terms, see the Craftsman warranty web page.
This warranty gives you specific legal rights, and you may also have other
rights which vary from state to state.
Sears Brands Management Corporation, Hoffman Estates, IL 60179.
SAVE THESE INSTRUCTIONS!
READ ALL INSTRUCTIONS!
This 1/4sheet sander has many features for making its use 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.
_, DANGER: People with electronic devices, such as 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.
2 © Sears Brands, LLC

_,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 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 chemicah 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.

Thepurposeofsafetysymbolsistoattractyouattentiontopossibledangers.
Thesafetysymbolsandtheexplanationswiththemdeserveyourcareful
attentionandunderstanding.Thesymbolwarningsdonot,bythemselves,
eliminateanydanger.Theinstructionsandwarningstheygivearenosubstitutes
forproperaccidentpreventionmeasures.
,_, WARNING: Be sure to read and understand all safety instructions in this
manual, including all safety alert symbols such as "DANGER," "WARNING," and
"CAUTION" before using this tool. Failure to follow all instructions listed in this
manual may result in electric shock, fire, and/or serious personal injury.
SYMBOL SIGNAL MEANING
SAFETY ALERT SYMBOL: indicates DANGER, WARNmNG, or CAUTION; may
be used in conjunction with other symbols or pictographs.
,_ 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.
_1_ CAUTION: Indicates a hazardous situation which, if not avoided, could
result in minor or moderate injury.
Damage prevention and Information Messages
These inform the user of important information and/or instructions that could
Beadto equipment or other property damage if they are not followed. Each
message is preceded by the word "NOTICE", as in the example below.
NOTICE: Equipment and/or property damage may result if these instructions are
not followed.
_WARNING: To ensure safety and reliability, all repairs should be performed
by a qualified service technician.
,_ WARNmNG: The operation of any power tools can result in
foreign objects being thrown into your eyes, which can result
in severe eye damage. Before beginning power tool operation,
always wear safety goggles or safety glasses with side shield
and a full face shield when needed. We recommend a Wide
Vision Safety Mask for use over eyeglasses or standard safety
glasses with side shields. Always use eye protection which is
marked to comply with ANSI Z87.1.

SAVE THESE iNSTRUCTiONS
Some of these following symbols may be used on this tool. Please study them
and Beam their meaning. Proper interpretation of these symbols will allow you to
operate the tool better and more safely.
SYMBOL NAME DESIGNATION/EXPLANATION
V Volts Voltage
A Amperes Current
Hz Hertz Frequency (cycles per second)
W Watt Power
min Minutes Time
Alternating Current Type of current
Direct Current Type or a characteristic of current
n O No-load Speed Rotational speed, at no load
[] Class II Construction Double-insulated construction
.../min Per Minute Revolutions, strokes, surface speed,
orbits, etc., per minute
Wet Conditions Alert Do not expose to rain or use in damp
locations.
To reduce the risk of injury, user must
Read The Operator's Manual read and understand operator's manual
before using this product.
O Always wear safety goggles or safety
Eye Protection glasses with side shields and a fulI face
shield when operating this product.
Alert Precautions that involve
Safety your safety.
No=Hands Symbol Failure to keep your hands away from theblade will result in serious personal injury.
No=Hands Failure to keep your hands away from the
Symbol blade will result in serious personal injury.
No-Hands Failure to keep your hands away from the
Symbol blade will result in serious personal injury.
No-Hands Symbol Failure to keep your hands away from the
blade will result in serious personal injury.
Hot Surface To reduce the risk of injury or damage,
avoid contact with any hot surface.
5

GENERAL POWER TOOL SAFETY WARNINGS
,_ WARNING: Read aft safety warnings and instructions. Failure to follow the
warnings and instructions may result in electric shock, fire and /or serious injury.
Save all warnings and instructions for future reference.
The term "power tool" in the warnings refers to your mains=operated (corded)
power tool or battery=operated (cordless) power tool.
WORK AREA SAFETY
• Keep work area clean and well lit. Cluttered or 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 create sparks
which may ignite the dust or fumes.
= Keep children and bystanders away while operating a power tool.
Distractions can cause you to lose control.
ELECTRICAL SAFETY
•Power tool plugs must match the outlet. Never modify the plug in any
way. Do not use any adaptor plugs with earthed (grounded) power tools.
Unmodified plugs and matching outlets will reduce risk of electric shock
• Avoid body contact with earthed or grounded surfaces such as pipes,
radiators, ranges and refrigerators. There is an increased risk of electric
shock if your body is earthed or grounded.
• 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 cord. Never use the cord for carrying, pulling or
unplugging the power tool. Keep cord away from heat, oil, sharp edges or
moving parts. Damaged or entangled cords increase the risk of electric shock.
• When operating a power tool outdoors, use an extension cord suitable
for outdoor use. Use of a cord suitable for outdoor use reduces the risk of
electric shock.
if operating a power tool in a damp location is unavoidable, use a
ground fault circuit interrupter (GFCl} protected supply. Use of a GFCI
reduces 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.
• Use personal protective equipment. Always wear eye protection. Protective
equipment such as dust mask, non-skid safety shoes, hard hat, or hearing
protection used for appropriate conditions will reduce personal injuries.
•Prevent unintentional starting. Ensure the switch is in the off-position
before connecting to power source and/or battery pack, picking up or
carrying the tool. Carrying power tools with your finger on the switch or
energizing in power tools that have the switch on invites accidents.
• Remove any adjusting key or wrench before turning the power tool
on. A wrench or a key 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. This
enables better control of the power tool in unexpected situations.
•Dress properly. Do not wear loose clothing or jewelry. Keep your hair,
clothing and gloves away from moving parts. Loose clothes, jewelry or
long hair can be caught in moving parts.
• If devices are provided for the connection of dust extraction and
collection facilities, ensure these are connected and properly used. Use
of these devices can reduce dust-related hazards.
POWER TOOL USE AND CARE
• Do not force the power tool. Use the correct power tool for your
application. The correct power tool will do the job better and more safely at
the rate for which it was designed.
• Do not use the power tool if the switch does not turn it on and off. Any
power tool that cannot be controlled with the switch is dangerous and must
be repaired.
• Disconnect the plug from the power source andlor the battery pack
from the power tool before making any adjustments, changing
accessories, or storing power tools. Such preventive safety measures
reduce the risk of starting the power tool accidentally.
• Store idle power tools out of the reach of children and do not allow
persons unfamiliar with the power tool or these instructions to operate
the power tool. Power tools are dangerous in the hands of untrained users.
•Maintain power tools. Check for misalignment or binding of moving
parts, breakage of parts and any other condition that may affect the
power tool's operation, if damaged, have the power tool repaired
before use. Many accidents are caused by poorly maintained power tools.

Keepcuttingtoolssharpandclean.Properlymaintainedcuttingtoolswith
sharpcuttingedgesarelesslikelytobindandareeasiertocontrol.
Usethepower tool, accessories and tool bits etc., in accordance with
these instructions, taking into account the working conditions and the
work to be performed. Use of the power tool for operations different from
those intended could result in a hazardous situation.
SERVICE
Have your power tool serviced by a qualified repair person using only
identical replacement parts. This will ensure that the safety of the power
tool is maintained.
Follow instructions in the Maintenance section of this manual. Use of
unauthorized parts or failure to follow Maintenance instructions may create
a risk of shock or injury.
SPECiFiC SAFETY RULES FOR SHEET SANDER
= Hold sanders by insulated gripping surfaces, because the sandpaper
may contact its own cord. Cutting a "live" wire may make exposed metal
parts of the power tool "live" and could give the operator an electric shock.
=A suitable breathing respirator must be worn while sanding lead paint,
some woods and metal to avoid breathing the harmful/toxic dust or air.
=Always wear safety goggles and a dust mask when sanding, especially
sanding over-head.
= The machine is not suitable for wet sanding.
= Secure the workpiece. A workpiece clamped with clamping devices or in a
vice is held more secure than by hand.
= Make sure the sandpaper is not contacting the workpiece before the on/off
rocker switch is in the ON position.
= Do not leave the tool running. Operate the tool only when hand-held.

KNOW YOUR SHEET SANDER (Fig. 1)
Fig. 1 Cord
On/Off Rocker
Switch
Platen
Vent
Vacuum Adaptor
per Clamp
Dust Bag Paper Punch 1/4 Sandpaper Sheets
ii oo o
O O O O
O O O
PRODUCT SPECIFICATIONS
Input 120V, 60Hz, AC only, 2.0 Amps
No-load Speed 14000 OPM
Paper Size 1/4 sheet
Paper Type Non-adhesive sandpaper
Protection Class II
,_ WARNmNG: The safe use of this product requires an understanding of the
information on the tool and in this operatoCs manual as well as knowledge of the
project you are attempting. Before using this product, familiarize yourself with all
operating features and safety rules.

ORBITAL MOTION
Orbital motion is ideal for fast cutting action when removing old finishes,
smoothing rough wood, cutting stock down to required dimensions or for
finishing surfaces to be painted. The sandpaper moves in tiny circles at a very
high speed, allowing the sander to move easily.
DUST BAG
Use the dust bag for removing dust from the sanding space to help keep the
working area clean.
VACUUM ADAPTOR
The on=board vacuum adaptor allows you to connect to a 1=1/4 in. or 2=1/4 in.
diameter vacuum hose to help keep the work area clean.
ON/OFF ROCKER SWITCH
The dust=sealed on/off rocker switch is conveniently Bocatedfor easy control,
sealed to keep out dust for Bonglife.
PAPER CLAMP
The sander has two paper clamps designed to secure standard sandpaper to
the pnaten.
PAPER PUNCH
The paper punch can be used to punch holes in sandpapers, to allow sanded
material to pass through the sheet sander into the dust box or through a vacuum.
10

,&
,_b, WARNING: If any parts are broken or missing, do not attempt to plug or
operate the sheet sander until the broken or missing parts are replaced. Failure
to do so could result in possible serious injury.
_, WARNING: Do not attempt to modify this sander or create accessories not
recommended for use with this sheet sander. Any such alteration or modification is
misuse and could result in a hazardous condition leading to possible serious injury.
,_, WARNING: To prevent accidental starting that could cause serious personal
injury, always disconnect the sander from the power source when assembling
parts, making adjustments, installing or removing sandpaper, cleaning, or when
it is not in use.
UNPACKING
* Carefully remove the tool and any accessories from the carton. Make sure
that all items listed in the packing list are included.
* Inspect the tool carefully to make sure that 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 return the tool to the place of
purchase.
PACKING LIST
1/4 sheet sander, 3 sandpapers (grit 60,120,220), dust bag, paper punch and
operator's manual.
11

,& WARNING: To prevent accidental starting that could cause serious personal
injury, always disconnect the sander from the power source when assembling
parts, making adjustments, installing or removing sandpaper, cleaning, or when
it is not in use.
TURNING THE SANDER ON/ [ Fig. 2
OFF (Fig, 2) /
To turn on the sander, connect
the plug to an electrical outlet,
and depress the side of the rocker
switch marked "F.
To turn it off, depress the side of
the rocker switch marked "0".
ATTACHING THE
SANDPAPER
switch
_1_ WARNING: Always inspect the sandpaper before attaching. Do not use the
paper if it is torn or defective. The non-adhesive sandpaper clamps to the front
and back of the platen.
1. Disconnect the sander from the power source.
WARNING: Failure to unplug the sander could result in accidental starting,
causing possible serious personal injury.
2. Remove any dust or debris from the platen.
3. The paper clamp levers are located on each side of the sander and are locked
into the slot on top of the platen.
4. Raise these two levers "up"
and disengage them from
the slots in the platen. This
will release the tension on
the paper clamps that hold clamp
the paper in position on the
underside of the platen (Fig. 3).
5. Insert the front end of the
sandpaper approximately 1/2 in.
under the front paper clamp. Paper clamp
6. Lift up on the lever that lever
controls the front paper clamp
and lock it back into the slot on
the platen. This will securely clamp the paper to the front of the platen.
12

7.
8.
Smooth out the sandpaper by pressing it tightly against the bottom of the
platen (front to back).
Insert the back end of
the sandpaper into the
back paper clamp, fit the
sandpaper as tightly as
possible, and lift up on the
back clamp lever to lock it
into place. This will securely
clamp the paper to the back
of the platen. The sandpaper
should now be positioned
tightly against the underside
of the platen from front to
back and securely clamped in
place (Fig. 4).
Paper
goes (
under the
clamp
to clamp pa_
PAPER PUNCH
A paper punch is provided with
the sander so you can punch
properly aligned holes into the
sandpaper. This is done after the
paper is installed onto the sander.
To punch holes, line up the front
and side of the sander over the
paper punch as shown in Fig. 5,
then lower the sander onto the
punch template while applying
pressure. Make sure that the holes
are punched all the way through
the paper and clear the holes in
the sandeds platen.
NOTICE: Punching holes
propedy is a necessary step for
the dust-collecting system to
operate properly.
Fig. 5
!
@_per punch
DUST BAG
,_ WARNING: Do not use the dust bag when sanding metal. Using the dust
bag when sanding metal creates a fire hazard, which could damage the tool and
lead to serious personal injury.
Your sheet sander is supplied with a dust bag to help you keep the working area
clean. The dust bag is idea[ for smaller jobs.
13

To install:
1. Disconnect the sander from
the power source.
2. Align the indicators on the
vacuum adaptor and the
dust bag.
3. Slide the dust bag forward and
push it onto the adaptor; rotate
the bag clockwise to lock it in
place (Fig. 6).
NOTICE: From time to time, clean
the vacuum adaptor with a dry brush.
ck
/Adaptor
Indicator Indicator
To remove:
1. Disconnect the sander from the power source.
2. Grip the dust bag firmly, rotate it counterclockwise and pull it out from the
tool (Fig. 6).
NOTICE: For longer periods of use, or on large pieces of work, it is advisable to
use a suitable vacuum cleaner. Attach an 1-1/4 in. or 2-1/4 in. wet/dry-vacuum
hose to the vacuum adaptor. It is advisable to also wear a suitable dust mask, as
there may be residual airborne dust particles in the area.
_, WARNING: The dust that is produced while sanding can be detrimental
to health, flammable, or explosive. Suitable safety measures are required.
Examples: Some types of dust known to cause cancer. Always wear a dust
mask, and use the proper dust collection method: dust box for small volume and
vacuum connection for Bargevolume dust collection.
SELECTING THE RIGHT GRADE OF SANDPAPER
Different grades of sandpaper can be purchased from the store where you
purchased the tool. Available grades are: Coarse, Medium and Fine.
Use a coarse grit to sand down rough finishes, medium grit to smooth the work
and fine grit to finish off.
It is best to make a trial run on a scrap piece of material to determine the
optimum grades of sandpaper for a particular job.
SANDING
This sander can be used for most sanding operations on materials such as
wood, plastic, metal and painted surfaces.
_, WARNING: Do not touch the vents after prolonged use; the gear box could
be very hot.
14

WARNING: Wear safety goggles, dust mask, and hearing protection.
_, CAUTION: Clamp the workpiece to prevent it from moving during operating.
An unsecured workpiece could be thrown towards the operator, causing injury.
1. Plug the sander to the power source.
_, WARNING: Before connecting the sander to power source, always check to
be sure that the switch is in the OFF (O) position. Failure to do so could result in
accidental starting of the sander, causing possible serious injury.
2. Start the sander and allow the motor build to its maximum speed.
,_ WARNING: Keep your head away from the sander and the sanding area.
Your hair could be drawn into the sander, causing serious injury.
3. Place the sander on the workpiece so that the sandpaper is fully in contact with
the workpiece.
4. For best sanding results, apply light pressure on the sander, but do not force
the tool.
NOTICE: Applying additional pressure only slows the motor, rapidly wears
sandpaper, and greatly reduces sander speed. Excessive pressure will ovedoad
the motor, causing possible damage from motor overheating and can result in
inferior work.
5. Move the sander slowly, guiding it in a forward and backward motion.
The removal rate and the sanding pattern are determined by the choice of
sandpaper and the work surface.
6. Do not allow sanding on one spot too long as the sander's rapid action may
remove too much material, making the surface uneven.
7. Upon completion of sanding operation, remove the sander from the
workpiece, turn the sander off and wait it comes to a complete stop before
putting it down.
8. Extended periods of sanding may tend to overheat the motor. If this occurs,
remove the sander from the workpiece and turn it off, wait until the sander
comes to a complete stop before putting it down. Unplug the sander and
remove the sandpaper. Then, making sure to keep your hand away from the
vent area, turn the sander on and run it without load to cool the motor.
15

AWARNING: Before cleaning or performing any maintenance, make sure that
the sheet sander has been disconnected from the power source.
,_ WARNING: Always wear safety goggles or safety glasses with side shields
when using compressed air to clean the tool. Ifthe operation is dusty, also wear a
dust mask.
CLEANING THE DUST
BAG (Fig. 7)
For more efficient operation,
empty the dust bag when it is
no more than half full. This will
permit the air to flow through the
dust bag better. Always empty
and thoroughly clean the dust bag
when you've finished sanding and
before you store the sander.
Fig. 7
Frame
Dust bag
Slot Steel ring
To empty the dust bag
1. Disconnect the sheet sander from the power source.
2. Remove the dust bag from the sander and shake out the dust.
3. For a more thorough cleaning of the dust bag, remove the dust bag from the
frame and shake out the dust bag (Fig. 7).
4. Use a soft brush to clean the frame.
5. Replace the dust bag over the frame, then reinstall it on the sander.
NOTICE: When replacing the dust bag over the frame, make sure that the steel
ring in the dust bag snaps into the slot of the frame.
WARNING: Collected sanding dust from sanding surface coatings such
as polyurethanes, linseed oil, etc., can self-ignite in the sander dust bag or
elsewhere and cause fire. To reduce the risk of fire, always empty the dust bag
frequently while sanding and never store or leave a sander without
totally emptying its dust bag. Also follow the recommendations of the coating
manufacturer.
GENERAL MAINTENANCE
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, dust, oil, grease, etc. Keep all
ventilation openings clean.
i6

_1_ WARNING: Do not at any time let brake fluids, gasoline, petroleum-based
products, penetrating oils, etc. come in contact with plastic parts. Chemicals can
damage, weaken or destroy plastic which may result in serious personal injury.
,_ WARNING: When servicing, use only identical replacement parts. Use of any
other parts may create a hazard or cause product damage. To ensure safety and
reliability, all repairs should be performed by a qualified service technician.
PROBLEM CAUSE
The sander does not Not connected to power
work source
Unsatisfactory sanding
result
Sandpaper is worn
Sandpaper is not suitable
for the workpiece
SOLUTION
Plug the sander into a
power source
Replace with new
sandpaper
Use correct sandpaper
17

2.0AMP 1/4 SHEET SANDER MODEL NUMBER 320.39587
The Model Number will be found on the nameplate of the tool. Always mention
the Model Number when ordering parts for this tool.
To order parts, call 1-881-331-4569.
26 27 28
1
401
3O
18

2.0 AMP 1/4 SHEET SANDER MODEL NUMBER 320°39587
The Model Number will be found on the nameplate of the tool Always mention
the Model Number when ordering parts for this tool
To order parts, call 1-888-331-4569°
1 3321699000 Left Housing
2 3321698000 Right Housing
3 2740350000 Stator
201 2823831000 Rotor Set
4 5700006000 Ball Bearing
5 5650050000 Plain Washer
6 3124643000 Insulated Pad
7 2751007000 Rotor
8 5650043000 Plain Washer
9 5700010000 Ball Bearing
10 3421538000 Dust Fan
11 5650044000 Plain Washer
12 5700014000 Ball Bearing
13 3520773000 Counterweight
14 5620069000 Screw
15 3127319000 Fan Baffle
16 3700137000 Flange Screw
17 3703578000 Felt rinq
18 3121038000 Rubber Stick
19 5620504000 Screw
20 3402665000 Pad Support
21 3402447000 Wire Hold
22 3127318000 Base Plate
23 5630002000 Hexagon Nut
24 2822801000 Soft Pad Assembly
25 5620040000 Screw
26 3127321000 Switch Cover
27 4870051000 Switch
28 3700577000 Fixing Board
29 4930004000 Connecter
30 5690013000 O Ring
31 3700491000 Flash Board
32 2800015000 Brush Holder
1
1
1
1
1
1
1
1
2
1
2
1
1
1
1
1
2
1
1
2
2
2
1
2
1
4
1
1
1
1
2
2
2
19

4960015000 Carbon Brush
34 2823862000 PCB Assembly 1
35 5610024000 Tapping Screw 2
36 3120234000 Cord Anchorage 1
37 4930004000 Connecter 1
38 5690268000 O Ring 1
39 5660187000 C Ring 1
40 5610248000 Tapping Screw 5
41 3121065000 Cord Guard 1
42 4810002000 Power Cord & Plug 1
43 2490136000 Nylon String 1
44 2823863000 Inner Wire Assembly 1
300 2822510000 Dust Bag Assembly 1
301 2823158000 Dust Bag Assembly 1
302 3127320000 Dust Bag Skeleton 1
303 3127397000 Vacum Adapter 1
304 3121354000 Paper Punch 1
305 2820409000 Sanding Paper 1
401 2243608000 LOGO Nameplate 1
402 2243608000 Nameplate 1
2O