Hitachi FS 10SA Operator's manual

WARNING:
Improper and unsafe use of this power tool can result in
death or serious bodily injury!
This manual contains important information about prod-
uct safety. Please read and understand this manual before
operatingthepowertool.Pleasekeepthismanualavailable
for others before they use the power tool.
DOUBLE INSULATION
INSTRUCTION MANUAL
AND
SAFETY INSTRUCTIONS
FOR
ORBITAL SANDER
MODEL FS 10SA

2
— CONTENTS —
Page
IMPORTANT INFORMATION.............................................................................. 3
MEANINGS OF SIGNAL WORDS ...................................................................... 3
SAFETY
IMPORTANT SAFETY INSTRUCTIONS
FOR USING ALL POWER TOOLS....................................... 4
IMPORTANT SAFETY INSTRUCTIONS
FOR USE OF THE ORBITAL SANDER ................................ 8
REPLACEMENT PARTS ...................................................................................... 8
POLARIZED PLUGS ............................................................................................ 8
USE OF EXTENSION CORD ............................................................................... 9
DOUBLE INSULATION FOR SAFER OPERATION ............................................. 10
OPERATION AND MAINTENANCE
NAME OF PARTS ................................................................................................ 11
SPECIFICATIONS ................................................................................................ 11
ACCESSORIES .................................................................................................... 12
STANDARD ACCESSORIES ...................................................................... 12
OPTIONAL ACCESSORIES........................................................................ 12
APPLICATIONS.................................................................................................... 12
PRIOR TO OPERATION ....................................................................................... 13
PRACTICAL OPERATING PROCEDURES........................................................... 14
HOW TO INSTALL THE OPTIONAL ACCESSORIES ......................................... 15
MAINTENANCE AND INSPECTION................................................................... 15
SERVICE AND REPAIRS...................................................................................... 16
PARTS LIST ......................................................................................................... 18

3
IMPORTANT INFORMATION
Read and understand all of the operating instructions, safety precautions and
warnings in the Instruction Manual before operating or maintaining this power tool.
Most accidents that result from power tool operation and maintenance are caused
by the failure to observe basic safety rules or precautions. An accident can often
be avoided by recognizing a potentially hazardous situation before it occurs, and
by observing appropriate safety procedures.
Basic safety precautions are outlined in the “SAFETY” section of this Instruction
Manual and in the sections which contain the operation and maintenance
instructions.
Hazards that must be avoided to prevent bodily injury or machine damage are
identified by WARNINGS on the power tool and in this Instruction Manual.
Never use this power tool in a manner that has not been specifically recom-
mended by HITACHI, unless you first confirm that the planned use will be safe for
you and others.
MEANINGS OF SIGNAL WORDS
WARNING indicates a potentially hazardous situations which, if ignored, could
result in serious personal injury.
CAUTION indicates a hazardous situations which, if ignored, could result in
moderate personal injury, or could cause machine damage.
NOTE emphasizes essential information.

4
SAFETY
INPORTANT SAFETY INSTRUCTIONS
FOR USING ALL POWER TOOLS
WARNING: Death or serious bodily injury could result from improper or
unsafe use of power tools. To avoid these risks, follow these
basic safety instructions:
READ ALL INSTRUCTIONS
1. NEVER TOUCH MOVING PARTS.
Never place your hands, fingers or other body parts near the tool’s moving parts.
2. NEVER OPERATE WITHOUT ALL GUARDS IN PLACE.
Never operate this tool without all guards or safety features in place and in
proper working order. If maintenance or servicing requires the removal of a
guard or safety feature, be sure to replace the guard or safety feature before
resuming operation of the tool.
3. ALWAYS WEAR EYE AND EAR PROTECTOR.
Protect yourself from flying or expelled wood chips, metal particles or other
debris by using protective goggles or equivalent eye protector. Wear ear
protector to protect yourself from excessive noise.
4. PROTECT YOURSELF AGAINST ELECTRIC SHOCK.
Prevent body contact with grounded surfaces such as pipes, radiators, ranges
and refrigeration enclosures. Never operate the tool in damp or wet locations.
5. DISCONNECT TOOLS.
Never leave the tool connected to a power source. Always disconnect the tool
from its power source before servicing, inspecting, maintaining, cleaning and
before changing or checking any parts.
6. AVOID UNINTENTIONAL STARTING.
Don’t carry the tool while it is connected to its power source. Don’t carry the
tool with your finger near the power switch. Be sure the power switch is in the
‘“off”position before connecting the tool to its power source.
7. STORE TOOL PROPERLY.
When not in use, the tool should be stored in a dry place. Keep out of reach of
children. Lock-out the storage area.
8. KEEP WORK AREA CLEAN.
Cluttered areas and benches invite injuries. Clear all work areas and work
benches of unnecessary tools, debris, furniture, etc.

5
9. CONSIDER WORK AREA ENVIRONMENT.
Don’t expose power tools to rain. Don’t use power tools in damp or wet
locations. Keep work area well lit and well ventilated.
Don’t use tool in presence of flammable liquids or gases.
Power tools produce sparks during operation. They also spark when
switching ON/OFF. Never use power tools in sites containing lacquer, paint,
benzine, thinner, gasoline, gases, adhesive agents, and other materials
which are combustible or explosive.
10. KEEP CHILDREN AWAY.
Do not let visitors contact tool or extension cord.
All visitors should be kept safely away from work area.
11. DON’T FORCE TOOL.
It will do the job better and safer at the rate for which it was intended.
12. USE RIGHT TOOL.
Don’t force small tool or attachment to do the job of a heavy-duty tool.
Don’t use tool for purpose not intended—for example—don’t use circular saw
for cutting tree limbs or logs.
13. DRESS PROPERLY.
Do not wear loose clothing or jewelry. They can be caught in moving parts.
Rubber gloves and non-skid footwear are recommended when working
outdoors.
Wear protective hair covering to contain long hair.
14. USE FACE, DUST MASK OR RESPIRATOR IF OPERATION IS DUSTY.
All persons in the area where power tools are being operated should also wear
face, dust mask or respirator.
15. DON’T ABUSE CORD.
Never carry tool by cord or yank it to disconnect from receptacle.
Keep cord from heat, oil and sharp edges.
16. SECURE WORK.
Use clamps or a vise to hold work. It’s safer than using your hand and it frees
both hands to operate tool.
17. DON’T OVERREACH.
Keep proper footing and balance at all times.
18. MAINTAIN TOOLS WITH CARE.
Keep tools sharp and clean for better and safer performance.
Follow instructions for lubricating and changing accessories.
Inspect tool cords periodically and if damaged, have repaired by an authorized
service center. Inspect extension cords periodically and replace if damaged.
Keep handles dry, clean, and free from oil and grease.

6
19. REMOVE ADJUSTING KEYS AND WRENCHES.
Keys and adjusting wrenches remove from tool before turning it on.
20. OUTDOOR USE EXTENSION CORD.
When tool is used outdoors, use only extension cord intended for use outdoors
and so marked.
21. STAY ALERT.
Watch what you are doing. Use common sense. Do not operate tool when you
are tired.
Tools should never be used by you if you are under the influence of alcohol,
drugs or medication that makes you drowsy.
22. 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 unless otherwise indicated elsewhere in this
Instruction Manual.
Have defective switches replaced by the authorized service center.
Do not use tool if switch does not turn it on and off.
23. NEVER USE A POWER TOOL FOR APPLICATIONS OTHER THAN THOSE
SPECIFIED.
Never use a power tool for applications other than those specified in the
Instruction Manual.
24. HANDLE TOOL CORRECTLY.
Operate the tool according to the instructions provided herein. Do not drop
or throw the tool. Never allow the tool to be operated by children, individuals
unfamiliar with its operation or unauthorized personnel.
25. CHECK FOR LIVE WIRES.
Avoid the risk of severe electrical shock by checking for live electrical wires
that may be buried in walls, floors or ceilings. The wires should be de-energized
before work begins.
26. KEEP ALL SCREWS, BOLTS AND COVERS TIGHTLY IN PLACE.
Keep all screws, bolts, and plates tightly mounted. Check their condition
periodically.
27. DO NOT USE POWER TOOLS IF THE PLASTIC HOUSING OR HANDLE ARE
CRACKED.
Cracks in the tool’s housing or handle can lead to electric shock. Such tools
should not be used until repaired.

7
28. BLADES AND ACCESSORIES MUST BE SECURELY MOUNTED TO THE TOOL.
Prevent potential injuries to yourself or others. Blades, cutting implements and
accessories which have been mounted to the tool should be secure and tight.
29. KEEP MOTOR AIR VENT CLEAN.
The tool’s motor air vent must be kept clean so that air can freely flow at all
times. Check for dust build-up frequently.
30. OPERATE POWER TOOLS AT THE RATED VOLTAGE.
Operate the power tool at voltages specified on their nameplates.
If using the power tool at a higher voltage than the rated voltage, it will result
in abnormally fast motor revolution and may damage the unit and burn out
the motor.
31. NEVER USE A TOOL WHICH IS DEFECTIVE OR OPERATING ABNORMALLY
If the tool appears to be operating unusually, making abnormal noises, or
otherwise appears defective, stop using it immediately and arrange for repairs
by a Hitachi authorized service center.
32. NEVER LEAVE TOOL RUNNING UNATTENDED. TURN POWER OFF.
Don’t leave tool until it comes to a complete stop.
33. CAREFULLY HANDLE POWER TOOLS.
Should a power tool be dropped or struck against hard materials inadvertently
it may be deformed, cracked, or damaged.
34. DO NOT WIPE PLASTIC PARTS WITH SOLVENT.
Solvents such as gasoline, thinner, benzine, carbon tetrachloride, and alcohol
may damage and crack plastic parts. Do not wipe them with such solvents.
Wipe plastic parts with a soft cloth lightly dampened with soapy water and
dry thoroughly.
35. USE ONLY GENUINE HITACHI REPLACEMENT PARTS.
Replacement parts not manufactured by Hitachi may void your warranty and
can lead to malfunction and resulting injuries. Genuine Hitachi parts are
available from your dealer.

8
IMPORTANT SAFETY INSTRUCTIONS
FOR USE OF THE ORBITAL SANDER
WARNING: Death or serious bodily injury could result from improper or
unsafe use of disc grinder. To avoid these risks, follow these
basic safety instructions:
1. NEVER apply water or lubricating oil, otherwise hazards from
electrical shocks may result.
2. ALWAYS operate the orbital sander safely for correct use.
3. ALWAYS securely installing the sanding paper.
4. ALWAYS wear a protective mask when operating the sander in confined
spaces.
REPLACEMENT PARTS
When servicing use only identical replacement parts.
Repairs should be conducted only by a Hitachi authorized service center.
POLARIZED PLUGS
To reduce the risk of electrick shock, this equipment has 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 the proper outlet.
Do not change the plug in any way.

9
USE OF 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 shows the correct size to use depending on cord length and
nameplate ampere rating. If in doubt, use the next heavier gage. The smaller the
gage number, the heavier the cord.
MINIMUM GAGE FOR CORD SETS
Total Length of Cord in Feet (Meter)
0 –25 26 –50 51 –100 101 –150
(0 –7.6) (7.9 –15.2) (15.5 –30.5) (30.8 –45.7)
Ampere Rating AWG
More Not More
Than Than
0 –618161614
6 –10 18 16 14 12
10 –12 16 16 14 12
12 –16 14 12 Not Recommended
WARNING: Avoid electrical shock hazard. Never use this tool with a
damaged or frayed electrical cord or extension cord.
Inspect all electrical cords regularly. Never use in or near water
or in any environment where electric shock is possible.

10
DOUBLE INSULATION FOR SAFER OPERATION
To ensure safer operation of this power tool, HITACHI has adopted a double insu-
lation design. “Double insulation”means that two physically separated insulation
systems have been used to insulate the electrically conductive materials connected
to the power supply from the outer frame handled by the operator. Therefore, ei-
ther the symbol “”or the words and “Double insulation”appear on the power
tool or on the nameplate.
Although this system has no external grounding, you must still follow the normal
electrical safety precautions given in this Instruction Manual, including not using
the power tool in wet environments.
To keep the double insulation system effective, follow these precautions:
䡬Only HITACHI AUTHORIZED SERVICE CENTER should disassemble or assemble
this power tool, and only genuine HITACHI replacement parts should be in-
stalled.
䡬Clean the exterior of the power tool only with a soft cloth moistened with soapy
water, and dry thoroughly.
Never use solvents, gasoline or thinners on plastic components; otherwise the
plastic may dissolve.
SAVE THESE INSTRUCTIONS
AND
MAKE THEM AVAILABLE TO
OTHER USERS OF THIS TOOL!

11
OPERATION AND MAINTENANCE
NOTE:
The information contained in this Instruction Manual is designed to assist you
in the safe operation and maintenance of the power tool.
Some illustrations in this Instruction Manual may show details or attachments
that differ from those on your own power tool.
NAME OF PARTS
Housing
Spring
Switch Trigger
Pad
Stopper
Fig. 1
SPECIFICATIONS
Motor Single-Phase Series Commutator Motor
Power Source Single-Phase 115V AC 60Hz
Current 1.7A
Input 180W
No-Load Speed 10,000 rpm
Dia. of Orbit 5/64" (2mm)
Sanding Pad Size 3-5/8" x 7-1/4" (92mm x 184mm)
Sanding Paper Size 3-5/8" x 9" (92mm x 228mm)
Weight 3.1 lbs(1.4kg)

12
ACCESSORIES
WARNING: Accessories for this power tool are mentioned in this Instruc-
tion Manual.
The use of any other attachment or accessory can be danger-
ous and could cause injury or mechanical damage.
STANDARD ACCESSORIES
䡬Sanding paper ..........................................................................................................3
(Grain: #60, #100, #150 ................................ 1 each)
OPTIONAL ACCESSORIES .. sold separately
䡬Sanding paper .............................................................................................(3 types)
Grain Code No.
#60 879371
#100 879373
#150 879375
䡬Dust Cover (Code No. 879390)
䡬Adapter (Code No. 963558)
NOTE:
Accessories are subject to change without any obligation on the part of the HITACHI.
APPLICATIONS
䡬Finish polishing of woodwork surfaces.
䡬Sanding surfaces of woodwork or sheet metal prior to painting, etc.
PRIOR TO OPERATION
1. Power source
Ensure that the power source to be utilized conforms to the power source
requirements specified on the product nameplate.

13
2. Power switch
Ensure that the switch is in the OFF position. If the plug is connected to a
receptacle while the switch is in the ON position, the power tool will start
operating immediately and can cause serious injury.
3. Extension cord
When the work area is far away from the power source, use an extension cord
of sufficient thickness and rated capacity (refer to page 8). The extension cord
should be kept as short as practicable.
WARNING: Damaged cord must be replaced or repaired.
4. Check the receptacle
If the receptacle only loosely accepts the plug, the receptacle must be repaired.
Consult an authorized electrician to make appropriate repairs.
If such a fautly receptacle is used, it may cause overheating, resulting in firing.
5. Check your working environment
Eusure the following before operation;
䡬No flammable gas, liquid, or object at worksite.
䡬Sanding thin steel sheet may cause a high booming sound.
In this case, place a rubber mat under the workpiece.
䡬Take appropriate noise preventive measures to prevent adverse affects on
the environment by electrical noise.
䡬Clear the area of children or unauthorized personnel.
6. Installing the Sanding Papers
Insert a sanding paper while unfastening the spring as shown in Fig. 2. Align
the sanding paper in parallel with the pad and pull it tight. Should the sanding
paper be loosely mounted, the finishing will become uneven or the sanding
paper may be damaged.
(To facilitate mounting the sanding paper)
After engaging the one side of sanding paper, fold the other side 3/8" (10mm)
from the edge as shown in Fig. 3. Fold the sanding paper again 3/8" (10mm)
from the folded edge.
3/8"
(10mm)
3/8"
(10mm)
Fig. 2 Fig. 3

14
PRACTICAL OPERATING PROCEDURES
CAUTION: Never apply water or grinding fluid when sanding.
This could result in electrical shock.
1. Switching the sander ON and OFF
By pulling the trigger and pushing the stopper, the switch will remain ON even
when the trigger is released, promoting continuous, efficient operation. By
pulling the trigger again, the stopper is released and the switch is turned OFF.
CAUTION: Never turn the power switch ON when the sander is contacting
the surface to be sanded. This is necessary to preclude damage
to the material. The same applies when switching the power OFF.
2. How to hold the orbital sander
While gripping the knob with one hand and the handle with the other, lightly
press the sander against the surface to be sanded so that the sanding paper
uniformly contacts the surface. DO NOT apply excessive pressure to the sander
while sanding. Excessive pressure may cause overload of the motor, reduced
service life of the sanding paper, and lower sanding or polishing efficiency. Also,
while sanding or polishing, never cover the ventilation port on the upper motor
housing. This could cause overheating and subsequent damage to the tool.
3. How move the orbital sander
For optimum operating efficiency, alternately move the sander forward and
backward at a constant speed and balance.
4. After installing new sanding paper
Movement of the sander may tend to become unsteady after new sanding paper
has been installed, because of the new, coarse grain of the paper. This can be
avoided by slightly tilting the sander forward or backward during sanding or
polishing. Sander movement will become steady as the sanding paper surface
becomes properly abraded.

15
HOW TO INSTALL THE OPTIONAL ACCESSORIES
1. Installing the dust cover
Position the dust cover as shown in Fig. 4. Engage the dust cover rear as shown
in Fig. 5 and depress the dust cover front downward.
2. Installing the cleaner
Connect the suction hose to the dust cover hole. (If the suction hose cannot be
connected, attach the supplied adaptor and fix with tape.)
MAINTENANCE AND INSPECTION
WARNING: Be sure to switch power OFF and disconnect the plug from the
receptacle during maintenance and inspection.
1. Inspecting the sanding paper
Since continuous use of worn sanding paper will definitely result in low sand-
ing or polishing efficiency, replace it with new paper as necessary.
2. Inspecting the mounting screws
Regularly inspect all mounting screws and ensure that they are properly tight-
ened. Should any of the screws be loose, retighten them immediately.
WARNING: Using this sander with loosen screws is extremely dangerous.
3. Maintenance of the motor
The motor unit winding is the very “heart”of the power tool. Exercise due care
to ensure the winding does not become damaged and/or wet with oil or water.
Fig. 4 Fig. 5
2
1

16
4. Inspecting the carbon brushes
For your continued safety and electrical protection, carbon brush inspection and
replacement on this tool should ONLY be performed by a HITACHI AUTHORIZED
SERVICE CENTER.
5. Keeping after use
When not in use, the sander should be kept in a dry place out of the reach of
children.
SERVICE AND REPAIRS
All quality power tools will eventually require servicing or replacement of parts
because of wear from normal use. To assure that only genuine replacement parts
will be used, all service and repairs must be performed by a HITACHI AUTHORIZED
SERVICE CENTER, ONLY.
NOTE:
Specifications are subject to change without any obligation on the part of the
HITACHI.

17

18

19
Item Part Name
No.
501A Sanding Paper G60
502A Sanding Paper G100
503A Sanding Paper G150
Parts are subject to change without
any obligation on the part of the
HITACHI due to improvements.
Item Part Name
No.
1B Housing (A)•(B) Set
2Tapping Screw (W/Washer)
D4 ×20
3 Nameplate
4 Leg Holder
5 Leg
6 Fan
7 Machine Screw M4 ×10
8 Spring Washer M4
9 Paper Holder
10 Support
11 Nut M4
12 Base Ass’y
13 Pad
15 Stator
16 Carbon Brush
17 Brush Holder
18 Armature
19 Washer (D)
20 Ball Bearing
(608VVMC2EPS2L)
22 Metal
24 Switch
25 Cord
27A HITACHI Label
28 Tapping Screw (W/Flange)
D4 ×16
29 Cord Clip
31 Cord Armor
34 Terminal (A) M3.5

Nippon Bldg., 6-2, Ohtemachi 2-chome,
Chiyoda-ku, Tokyo 100, Japan
710
Code No. 99479662