Rotary Orbital Sander
Model SAY – 150A
Handling instructions
Note:
Before using this Electric Power Tool, carefully read through these
HANDLING INSTRUCTIONS to ensure efficient, safe operation. It is
recommended that these INSTRUCTIONS be kept readily available
as an important reference when using this power tool.
GENERAL SAFETY RULES
WARNING!
Read all instructions
Failure to follow all instructions listed below may result in
electric shock, fire and/or serious injury.
The term “power tool” in all of the warnings listed below
refers to your mains operated (corded) power tool or battery
operated (cordless) power tool.
SAVE THESE INSTRUCTIONS
1) Work area
a) Keep work area clean and well lit.
Cluttered and dark areas invite accidents.
b) 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 of fumes.
c) Keep children and bystanders away while operating
a power tool.
Distractions can cause you to lose control.
2) Electrical safety
a) Power tool plugs must match the outlet.
Never modify the plug in any way.
Do not use any adapter plugs with earthed
(grounded) power tools.
Unmodified plugs and matching outlets will
reduce risk of electric shock.
b) 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.
c) Do not expose power tools to rain or wet
conditions.
Water entering a power tool will increase the
risk of electric shock.
d) 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.
e) 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
f) Recommendation for use of residual current
device with a rated residual current of 30 mA
or less.
3) Personal safety
a) Stay alert, watch what you are doing and use
common sense when operating a power tool.
Do not use a power tool while you are tired
or under the influence of drugs, alcohol or
medication.
A moment of inattention while operating power
tools may result in serious personal injury.
b) Use safety equipment. Always wear eye
protection.
Safety equipment such as dust mask, non-skid
safety shoes, hard hat, or hearing protection
used for appropriate conditions will reduce
personal injuries.
2
c) Avoid accidental starting. Ensure the switch is
in the off position before plugging in.
Carrying power tools with your finger on the
switch or plugging in power tools that have the
switch on invites accidents.
d) 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.
e) Do not overreach. Keep proper footing and balance
at all times.
This enables better control of the power tool in
unexpected situations.
f) Dress properly. Do not wear loose clothing or
jewellery. Keep your hair, clothing and gloves
away from moving parts.
Loose clothes, jewellery or long hair can be caught
in moving parts.
g) 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.
4) Power tool use and care
a) Do not force the power tool. Use the correct
power tool for your application.
The correct power tool will do the job better and
safer at the rate for which it was designed.
b) 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.
c) Disconnect the plug from the power source before
making any adjustments, changing accessories, or
storing power tools.
Such preventive safety measures reduce the risk
of starting the power tool accidentally.
d) 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.
e) Maintain power tools. Check for misalignment or
binding of moving parts, breakage of parts and
any other condition that may affect the power
tools operation.
If damaged, have the power tool repaired before
use.
Many accidents are caused by poorly maintained
power tools.
f) Keep cutting tools sharp and clean.
Properly maintained cutting tools with sharp cutting
edges are less likely to bind and are easier to
control.
g) Use the power tool, accessories and tool bits etc.,
in accordance with these instructions and in the
manner intended for the particular type of power
tool, taking into account the working conditions
and the work to be performed.
Use of the power tool for operations different from
intended could result in a hazardous situation.
5) Service
a) 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.
PRECAUTION
Keep children and infirm persons away.
When not in use, tools should be stored out of reach of
children and infirm persons.
SAFETY WARNINGS COMMON FOR
SANDING OR POLISHING OPERATIONS
a) This power tool is intended to function as a sander
or polisher tool. Read all safety warnings,
instructions, illustrations and specifications provided
with this power tool.
Failure to follow all instructions listed below may
result in electric shock, fire and/or serious injury.
b) Operations such as grinding, wire brushing or
cutting-off are not recommended to be performed
with this power tool.
Operations for which the power tool was not
designed may create a hazard and cause personal
injury.
c) Do not use accessories which are not specifically
designed and recommended by the tool
manufacturer.
Just because the accessory can be attached to your
power tool, it does not assure safe operation.
d) The rated speed of the accessory must be at least
equal to the maximum speed marked on the power
tool.
Accessories running faster than their rated speed
can break and fly apart.
e) The outside diameter and the thickness of your
accessory must be within the capacity rating of
your power tool.
Incorrectly sized accessories cannot be adequately
guarded or controlled.
f) The arbour size of wheels, flanges, backing pads
or any other accessory must properly fit the spindle
of the power tool.
Accessories with arbour holes that do not match
the mounting hardware of the power tool will run
out of balance, vibrate excessively and may cause
loss of control.
g) Do not use a damaged accessory. Before each use
inspect the accessory such as abrasive wheels for
chips and cracks, backing pad for cracks, tear or
excess wear, wire brush for loose or cracked wires.
If power tool or accessory is dropped, inspect for
damage or install an undamaged accessory. After
inspecting and installing an accessory, position
yourself and bystanders away from the plane of
the rotating accessory and run the power tool at
maximum no-load speed for one minute.
Damaged accessories will normally break apart
during this test time.
h) Wear personal protective equipment. Depending on
application, use face shield, safety goggles or safety
glasses. As appropriate, wear dust mask, hearing
protectors, gloves and workshop apron capable of
stopping small abrasive or workpiece fragments.
The eye protection must be capable of stopping
flying debris generated by various operations. The
dust mask or respirator must be capable of filtrating
particles generated by your operation. Prolonged
exposure to high intensity noise may cause hearing
loss.
i) Keep bystanders a safe distance away from work
area. Anyone entering the work area must wear
personal protective equipment.
Fragments of workpiece or of a broken accessory
may fly away and cause injury beyond immediate
area of operation.
j) Hold power tool by insulated gripping surfaces
only, when performing an operation where the
cutting accessory may contact hidden wiring or its
own cord.
Cutting accessory contacting a “live” wire may make
exposed metal parts of the power tool “live” and
shock the operator.
k) Position the cord clear of the spinning accessory.
If you lose control, the cord may be cut or snagged
and your hand or arm may be pulled into the
spinning accessory.
l) Never lay the power tool down until the accessory
has come to a complete stop.
The spinning accessory may grab the surface and
pull the power tool out of your control.
m) Do not run the power tool while carrying it at your
side.
Accidental contact with the spinning accessory could
snag your clothing, pulling the accessory into your
body.
n) Regularly clean the power tool’s air vents.
The motor’s fan will draw the dust inside the housing
and excessive accumulation of powdered metal may
cause electrical hazards.
o) Do not operate the power tool near flammable
materials.
Sparks could ignite these materials.
p) Do not use accessories that require liquid coolants.
Using water or other liquid coolants may result in
electrocution or shock.
KICKBACK AND RELATED WARNINGS
Kickback is a sudden reaction to a pinched or snagged
rotating wheel, backing pad or any other accessory. Pinching
or snagging causes rapid stalling of the rotating accessory
which in turn causes the uncontrolled power tool to be
forced in the direction opposite of the accessory’s rotation at
the point of the binding.
For example, if an abrasive wheel is snagged or pinched by
the workpiece, the edge of the wheel that is entering into the
pinch point can dig into the surface of the material causing
the wheel to climb out or kick out. The wheel may either
jump toward or away from the operator, depending on
direction of the wheel’s movement at the point of pinching.
Abrasive wheels may also break under these conditions.
Kickback is the result of power tool misuse and/or incorrect
operating procedures or conditions and can be avoided
by taking proper precautions as given below.
a) Maintain a firm grip on the power tool and position
your body and arm to allow you to resist kickback
forces. Always use auxiliary handle, if provided, for
maximum control over kickback or torque reaction
during start-up.
The operator can control torque reactions or kickback
forces, if proper precautions are taken.
b) Never place your hand near the rotating accessory.
Accessory may kickback over your hand.
3
c) Do not position your body in the area where power
tool will move if kickback occurs.
Kickback will propel the tool in direction opposite
to the wheel’s movement at the point of snagging.
d) Use special care when working corners, sharp edges
etc. Avoid bouncing and snagging the accessory.
Corners, sharp edges or bouncing have a tendency
to snag the rotating accessory and cause loss of
control or kickback.
e) Do not attach a saw chain woodcarving blade or
toothed saw blade.
Such blades create frequent kickback and loss of
control.
SAFETY WARNINGS SPECIFIC FOR SANDING
OPERATIONS
a) Do not use excessively oversized sanding disc paper.
Follow manufacturers recommendations, when
selecting sanding paper.
Larger sanding paper extending beyond the sanding
pad presents a laceration hazard and may cause
snagging, tearing of the disc or kickback.
SAFETY WARNINGS SPECIFIC FOR
POLISHING OPERATIONS
a) Do not allow any loose portion of the polishing
bonnet or its attachment strings to spin freely.
Tuck away or trim any loose attachment strings.
Loose and spinning attachment strings can entangle
your fingers or snag on the workpiece.
PRECAUTIONS ON USING ELECTRONIC
SANDER POLISHER
1. Never mount a grinding wheel and attempt to use
this tool as a disc grinder.
2. Ensure the sanding paper is securely attached by
pressing firmly.
3. Never apply grinding fluid or water to the unit or
material during operation.
4. Always hold the body handle and side handle of
the power tool firmly
Otherwise the counterforce produced may result in
inaccurate and even dangerous operation.
SPECIFICATIONS
Voltage 240V
Power input 380 W
No load speed 7000 / min
Disc Size 150 mm
Weight (without cord, standard accessories) 2.1 kg
STANDARD ACCESSORIES
(1) Sanding Pad .............................................................. 1
(2) Sanding Paper (#120 without hole) ...................... 1
(3) Bar Wrench ................................................................ 1
(4) Side handle ............................................................... 1
(5) Hexagon Bar Wrench .............................................. 1
(6) Dust Collection Set .................................................. 1
Standard accessories are subject to change without
notice.
OPTIONAL ACCESSORIES-sold separately
(1) Dust hose (1.5 m)
(2) Sanding Paper (with hole & without hole)
(3) Sanding Paper Punch
APPLICATIONS
Finishing of reparative coating of automobiles, painted
metal plates, etc.
䡬 Bordering between painted surfaces and metal
surfaces.
䡬 Polishing polyester patties.
Erasing letters, figures, etc., in reparative coating of
billboards.
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PRIOR TO OPERATION
1. Power source
Ensure that the power source to be utilized conforms
to the power requirements specified on the product
nameplate.
2. Power switch
Ensure that the power switch is in the OFF position.
If the plug is connected to a receptacle while the
power switch is in the ON position, the power tool
will start operating immediately, which could cause
a serious accident.
3. Extension cord
When the work area is removed from the power
source, use an extension cord of sufficient thickness
and rated capacity. The extension cord should be
kept as short as practicable.
4. Attaching sanding paper:
(1) As shown in Fig. 1, peel off the lining paper
beginning at the slit part. Ensure that the adhesive
on the back of the sanding paper does not become
fouled with dust or other foreign matter.
Lining paper
Slit part
Fig. 1
(2) After ensuring that the sanding pad is free of dust
and oil, mount the sanding paper to the sanding
pad as shown in Fig. 2, ensuring that the outer
circumferences of the pad and paper are matched.
Sanding paper
Sanding pad
Fig. 2
(3) Ensure that the sanding paper is securely attached
to the pad by pressing the paper strongly with the
palm of the hand, as shown in Fig. 3.
Press strongly
PRACTICAL OPERATING PROCEDURES
1. Turn the sander on after lightly applying it to the
surface to be sanded. Never leave the rotating tool
unattended.
2. Do not apply excessive pressure to the sander.
Excessive pressure may result in deterioration of
the sanded surface, and overloading of the tool.
3. Hold the housing and side handle of the sander
securely during operation.
4. The sanding paper should be removed as soon as
possible after completion of the operation. Sanding
paper left on the pad for several days may be very
difficult to remove.
5. After removing the sanding paper, ensure that any
adhesive remaining on the sanding pad is removed
completely by wiping it. Should any adhesive remain,
dust and dirt will adhere to the pad, resulting in
reduced adhesion when another sanding paper is
mounted.
6. Do not attempt to reattach sanding paper to the
pad once it has been removed. Reduced adhesive
strength could cause the sanding paper to come
flying off the pad, creating a serious hazard.
CAUTION
Immediately after use, DO NOT Iay the tool down
or touch the sanding pad until the rotation parts of
the tool come to a complete stop. Laying the tool
down in this manner could cause grit and dirt to
be sucked into the tool. Touching the rotating sanding
paper could cause serious injury.
REPLACING A SANDING PAD
1. Insert the accessory bar wrench into the groove of
the spindle connector and the opening of the pad
spindle, as shown in Fig. 4.
Pad spindle
Opening
Groove
Fig. 3
CAUTION
If the sanding paper is not attached securely as
described above, it could come off during operation,
inviting serious injury. As the adhesive may
deteriorate if the sanding paper is removed and
reattached several times, the sanding paper should
be aligned and attached securely in a single operation.
Spindle connector
Fig. 4
2. Holding the bar wrench, the sanding pad is tightened
by rotating in to the right (clockwise), and loosened
by rotating it to the left (counterclockwise), as shown
in Fig. 5.
Bar wrench
5
Sanding pad
To loosen To tighten
Bar wrench
Fig. 5
MAINTENANCE AND INSPECTION
1. Inspecting the mounting screws:
Regularly inspect all mounting screws and ensure
that they are properly tightened. Should any of the
screws be loose, retighten them immediately. Failure
to do so could result in serious hazard.
2. Inspecting the carbon brushes (Fig. 6)
The motor employs carbon brushes which are
consumable parts. Since an excessively worn carbon
brush can result in motor trouble, replace the carbon
brush with a new one having the same carbon
brush No. shown in the figure when it becomes
worn to or near the “wear limit”. In addition, always
keep carbon brushes clean and ensure that they
slide freely within the brush holders.
Wear limit
7. Service parts list
CAUTION
Repair, modification and inspection of Hitachi Power
Tools must be carried out by a Hitachi Authorized
Service Center.
This Parts List will be helpful if presented with the
tool to the Hitachi Authorized Service Center when
requesting repair or other maintenance.
In the operation and maintenance of power tools,
the safety regulations and standards prescribed in
each country must be observed.
MODIFICATIONS
Hitachi Power Tools are constantly being improved
and modified to incorporate the latest technological
advancements.
Accordingly, some parts (i.e. code numbers and/or
design) may be changed without prior notice.
NOTE
Due to HITACHI’s continuing program of research and
development, the specifications herein are subject to
change without prior notice.
21
5 mm
12 mm
Fig. 6
3. Replacing a carbon brush:
Disassemble the brush cap with a minus-head
screwdriver. The carbon brush can then be easily
removed.
4. Replacing supply cord
If the supply cord of Tool is damaged, the Tool
must be returned to Hitachi Authorized Service
Center for the cord to be replaced.
5. 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.
6. Cleaning lock pin section
If the lock pin section becomes dirty, clean it at
once.
6
No. of carbon
brush
Part Name Q’TY
1
12
×
2
16
×
Item
Part Name Q’TY
Item
No.
No.
TAPPING SCREW (W/WASHER) D4
44 FLAT HD. SCREW M3×10 1
45 HOUSING ASS'Y 1
46 CAUTION PLATE 1
47 CAUTION PLATE 1
48 RIVET D2.5×2.8 2
49 NAME PLATE 1
50 NUT M4 2
51 NUT COVER 2
52
53 SLIDE SWITCH 1
54 SWITCH HOLDER 1
55 NOISE SUPPRESSOR 1
56 TERMINAL 5005 1
57 TUBE (D) 2
60 TAIL COVER 1
61 TAPPING SCREW D4×16 4
62 CORD 1
63 BRUSH CAP 2
64 CARBON BRUSH 2
65 BRUSH HOLDER 2
66 HITACHI LABEL 1
2 GEAR COVER 1
3 LOCK NUT M5 1
4 MACHINE SCREW M4×10 8
5 SPRING WASHER M4 11
6 BEARING COVER (A) 1
7 BALL BEARING 608VVC2PS2L 1
8 INNER COVER 1
9 ARMATURE 1
10 MACHINE SCREW M4×65 2
11 STATOR ASS'Y 1
12 BRUSH TERMINAL 2
13 DUST SEAL 1
14 BALL BEARING 626VVC2PS2L 1
15 BEARING BUSHING 1
16 STOP PLATE 1
19 BEARING COVER (B) 2
20 BALL BEARING 6201VVCMPS2L 1
1A TAPPING SCREW D5×25 4
17A SIDE HANDLE 1
21 FELT PACKING 1
18A METAL 1
TAPPING SCREW (W/FLANGE) D4
67 CORD CLIP 1
68 TUBE (D) 2
69 CORD ARMOR 1
70
501 HEX. BAR WRENCH 3MM 1
502 SPECIAL WRENCH 1
616 DUST COLLECTOR SET 1
617 DUST COVER HOLDER (A) 1
22 SEAL PACKING 1
23 PACKING GLAND 1
24 SPRING WASHER M5 4
25 MACHINE SCREW M5×16 4
26 WOODRUFF KEY 2.5×81
27 FEATHER KEY 4×4×81
28 SPINDLE (A) 1
29 SPINDLE CONNECTOR (A) 1
618 DUST COVER 1
619 JOINT 1
620 DUST COVER HOLDER (B) 1
621 SPRING WASHER M4 1
622 MACHINE SCREW M4×10 1
623 PIPE 1
624 PIPE HOLDER ASS'Y 1
625 MACHINE SCREW M5×20 1
626 SPRING WASHER M5 1
627 WASHER 1
628 RUBBER PACKING 2
629 HEX. BAR WRENCH 4MM 1
30 HEX. SOCKET SET SCREW M6×12 1
31 RETAINING RING FOR D12 SHAFT 1
32 BALL BEARING 6201DDCMPS2L 1
33 CONNECTOR (A) ASS'Y 1
34 WASHER M4 (10 PCS.) 5
35 COUNTER WEIGHT 1
36 MACHINE SCREW M4×20 1
37 DUST SEAL 1
38 PAD SPINDLE 1
39 SANDING PAD 150MM 1
40 SANDING PAPER (A) 1
41 GEAR AND PINION ASS'Y 1
42 SLIDE BAR 1
43 SLIDE KNOB 1
7
Hitachi Koki Co., Ltd.
Shinagawa Intercity Tower A, 15-1, Konan 2-chome,
Minato-ku, Tokyo, Japan
812
Code No. 99470911 M
Printed in Malaysia
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