Hitachi Koki G 23MR, Handling Instructions Manual

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22
English
SPECIFICATIONS
*1 Be sure to check the nameplate on product as it is subject to change by areas.
*2 Weight: Only main body
*3 The starting current limiter produces the starting current to such an extent that a fuse (16A, slow-blow)
is not tripped.
STANDARD ACCESSORIES
(1) Wrench ........................................................................ 1
(2) Side handle ................................................................ 1
Depressed center wheels are not provided as standard
accessories.
Standard accessories are subject to change without
notice.
APPLICATIONS
䡬
Removal of casting fin and finishing of various types
of steel, bronze and aluminum materials and castings.
䡬
Grinding of welded sections or sections cut by
means of a cutting torch.
䡬
Grinding of synthetic resins, slate, brick, marble, etc.
䡬
Cutting of synthetic concrete, stone, brick, marble
and similar materials.
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. Fitting and adjusting the wheel guard
The wheel guard is a protective device to prevent
injury should the depressed center wheel shatter
during operation. Ensure that the guard is properly
fitted and fastened before commencing grinding
operation.
[Installing and adjusting the wheel guard]
䡬
Open the lever and insert the locating pin of wheel
guard, bringing it into line with the across flats of
packing ground.
䡬
Then, turn the wheel guard to a desired position
(for use).
䡬
Close the lever and fix it. If and when required,
carry out adjustments by tightening or loosening
the screw.
䡬
If the lever does not move smoothly, apply some
lubricating oil to the sliding section between the set
piece and the lever.
䡬
Fasten the wheel guard at the position where the
across flats of the wheel guard positioning pin and
packing ground are aligned (the position where the
wheel guard is inserted), but do not use it.
5. Ensure that the depressed center wheel to be utilized
is the correct type and free of cracks or surface
defects. Also ensure that the depressed center wheel
is properly mounted and the wheel nut is securely
tightened. Refer to the section on “Depressed Center
Wheel Assembly”.
6. Conducting a trial run
Ensure that the abrasive products is correctly
mounted and tightened before use and run the tool
at no-load for 30 seconds in a safe position, stop
immediately if there is considerable vibration or if
other defects are detected.
If this condition occurs, check the machine to
determine the cause.
7. Confirm the spindle lock mechanism
Confirm that the spindle lock is disengaged by
pushing push button two or three times before
switching the power tool on (See
Fig. 1 ).
8. Fixing the side handle
Screw the side handle into the gear cover.
PRACTICAL GRINDER APPLICATION
1. Pressure
To prolong the life of the machine and ensure a
first class finish, it is important that the machine
should not be overloaded by applying too much
pressure. In most applications, the weight of the
machine alone is sufficient for effective grinding.
Model G23MR G23MRU
Voltage (by areas)* 1 (110V, 220V, 230V, 240V)
Input* 1 2400 W 2500 W
No-load speed 6600 min -1
Outer dia. 230 mm
Wheel Inner dia. 22 mm
Peripheral speed 80 m/s
Weight* 2 5.4 kg
Starting current limiter* 3 No Yes