Operation Manual

7
English
HOW TO USE
1. Switching operation
(1) When moving the switch lever to the right (ON
side), power is applied; when moving it to the left
(OFF side), power is switched off.
(2) When first turning on the switch after installing a
new wheel, hold the grider away from your body
to avoid any danger of a wheel shattering due to
an imperfection.
(3) Before starting, test the machine with the wheel
pointed in a safe direction.
2. Precautions on operation
(1) Lightly press the wheel to the material to be ground.
When grinding materials, high-speed revolution is
necessary. Use a hand grinder with high-speed
revolution, minimizing the pressing force.
(2) Dressing the wheel
After attaching a wheel, correct deflection of the
wheel center by using a dresser. If the wheel center
is eccentric, Not only precise finishing cannot be
achieved but also grinder vibration increases,
lowering grinder accuracy and durability.
A clogged or worn wheel will spoil the finishing
surface or lower grinding efficiency. Occasionally
dress the wheel by applying the dresser.
WHEEL SELECTING METHOD
Types of wheels are varied according to the materials to
be ground. Select a wheel appropriate for the material to
be ground.
The following table is an out line of wheels and materials
to be ground.
Materials to be ground Grain Grading Bonding degree Structure Bonding agent
Mild steel, hard steel,
WA 60~80 P m V
forged steel
Cast iron C 36 M-O m V
Brass, bronze, aluminium C 36 J-K m V
Ceramic WA 60~80 M m V
Synthetic resin C 36 K-M m V
Small-scaled wheels with shaft are prepared for grinding
small surfaces. Their dimensions and shapes are shown
in “OPTIONAL ACCESSORIES”.
Since wheel shaft diameter is 3mm, use the collet chuck
for 3mm shaft sold separately by your HITACHI dealer as
an optional accessory.
MAINTENANCE AND INSPECTION
1. Inspecting the wheel
Ensure that the wheel is free of cracks and surface
defects.
2. 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.
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.
4. Inspecting the carbon brushes (Fig. 3)
The motor employs carbon brushes which are
consumable parts. Since an excessively worn carbon
brush can result in motor trouble, replace the carbon
brushes with new ones 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 ensue that they
slide freely within the brush holders.
5. Replacing carbon brushes
Disassemble the brush caps with a slotted-head
screwdriver. The carbon brushes can then be easily
removed.
6. Service parts list
A: Item No.
B: Code No.
C: No. Used
D: Remarks
CAUTION:
Repair, modification and inspection of Hitachi Power
Tools must be carried out by an 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.
GUARANTEE
We guarantee Hitachi Power Tools in accordance with
statutory/country specific regulation. This guarantee does
not cover defects or damage due to misuse, abuse, or
normal wear and tear. In case of complaint, please send
the Power Tool, undismantled, with the GUARANTEE
CERTIFICATE found at the end of this Handling instruc-
tion, to a Hitachi Authorized Service Center.
01Eng_GP2_WE 9/5/08, 11:437