Assembly And Operation; Applications; Prior To Operation; Disc Sander Operation - Hitachi S 18SB Instruction Manual

APPLICATIONS

○ Sanding metal surfaces.
○ Preliminary sanding of metal surfaces before painting,
rust removal, removing old paint before repainting.
○ Finishing woodwork, correcting projections of timbers
from joints or assemblies.
○ Preliminary sanding of wood surfaces before applying
paint.

PRIOR TO OPERATION

1. Power source
Ensure that the power source to be utilized conforms
to the power source requirements specifi ed on the
product nameplate.
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 suffi cient thickness
and rated capacity. 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. Contact a licensed
electrician to make appropriate repairs.
If such a fautly receptacle is used, it may cause
overheating, resulting in a serious hazard.
5. Check your working environment.
Ensure the following before operation;
○ No fl ammable gas, liquid, or object at worksite.
○ Grinding thin steel sheet may cause a high
booming sound.
In this case, place a rubber mat under the
workpiece.
○ Take appropriate noise preventive measures to
prevent adverse aff ects on the environment by
electrical noise.
○ Clear the area of children or unauthorized
personnel.
6. Check mounting of the sanding disc.
Check that sanding disc is mounted under the
specifi ed condition and is fi rmly clamped.
For details, refer to the item "SANDING DISC
ASSEMBLY AND DISASSEMBLY".
7. Fixing the side handle.
Screw the side handle into the housing.

ASSEMBLY AND OPERATION

8. Check the lock lever.
Make sure that the lock lever is disengaged by pushing
the lock lever two or three times before turning on the
disc sander (Fig. 4).
9. Installing the air cover
Install the air cover on the air vent on the side where
the side handle is attached to divert the cooling
air fl ow of the motor during operation as much as
possible. Hook tab of the air cover to the air vent and
push in the tab when installing. Use a screwdriver etc.
to pull as shown in Fig. 2 when removing.
Air cover

DISC SANDER OPERATION

1. Hold the disc sander fi rmly by its body hadle and side
handle (Fig. 1).
The disc sander produces a counterforce which must
be controlled by fi rmly holding onto the disc sander.
2. Switch operation
This enables the disc sander always to be controlled
with the hand gripping the machine for maximum
safety during grinding operations.
<Intermittent use>
Switch ON: Press the switch trigger.
Switch OFF: Release the switch trigger.
<Continuous use>
Switch ON: Press the switch trigger. The switch
trigger is locked by pushing on the
locking button.
Switch OFF: Press and release the switch
trigger.
3. Use light grinding pressure.
There is no need to press hard when grinding. Usually
the disc sander's own weight is suffi cient for the
surface to be ground.
CAUTION
Do not press the disc sander forcibly against
the surface to be ground. Heavy pressure can
damage the surface being ground or damage the
disc sander's motor.
English
Fig. 2
9