Precautions On Using Disc Grinder; Specifications; Standard Accessories; Prior To Operation - Hitachi G 12SN Handling Instructions Manual

PRECAUTIONS ON USING DISC GRINDER

1. Never operate these power tools without Wheel
Guards.
2. Check that speed marked on the wheel is equal to or
greater than the rated speed of the grinder.
Use only depressed center wheels rated at 80 m/s
(72 m/s only for 100 mm disc grinders) or more.
3. Ensure that the wheel dimensions are compatible
with the grinder and that the wheel fi ts the spindle.
4. Abrasive wheels shall be stored and handled with
care in accordance with manufacturer's instructions.

SPECIFICATIONS

Model
Voltage (by areas)*
Power Input*
No-load speed
Outer dia. × Hole dia.
Wheel
Peripheral speed
Weight (Only main body)
*Be sure to check the nameplate on product as it is subject to change by areas.

STANDARD ACCESSORIES

(1) Depressed center wheel .............................................1
(2) Wrench.........................................................................1
(3) Side handle..................................................................1
Standard accessories may differ depending on the market area.
Standard accessories are subject to change without notice.
APPLICATIONS
○ Removal of casting fi n and fi nishing of various
types of steel, bronze and aluminum materials and
castings.
○ Grinding of welded sections or sections cut by
means of a cutting torch.
○ Grinding of synthetic resins, slate, brick, marble, etc.

PRIOR TO OPERATION

1. Power source
Ensure that the power source to be utilized conforms
to the power requirements specifi ed 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 suffi cient 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
fi tted and fastened before commencing
operation.
5. Inspect the depressed center wheel before use, do
not use chipped, cracked or otherwise defective
products.
6. Always hold the body handle and side handle of
the power tool fi rmly. Otherwise the counterforce
produced may result in inaccurate and even
dangerous operation.
7. Do not use cutting-off wheels for side grinding.
8. Do not use of separate reducing bushings or
adapters to adapt large hole abrasive wheels.
9. The wheel continues to rotate after the tool is
switched off.
G10SN
(110 V, 120 V, 127V, 220 V, 230 V, 240 V)
100 × 16 mm 115 × 22.23 mm
72 m/s
By slightly loosening the setting screw, the wheel
guard can be turned and set at any desired angle for
maximum operational effectiveness. Ensure that the
setting screw is thoroughly tightened after adjusting
the wheel guard.
5. Ensure that mounted wheels and points are fi tted
in accordance with the manufacturer's instructions.
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 "ASSEMBLING
AND DISASSEMBLING THE DEPRESSED CENTER
WHEEL".
Ensure that blotters are used when they are provided
with the bonded abrasive product and when they are
required.
Do not use separate reducing bushings or adaptors
to adapt large hole abrasive wheels.
For tools intended to be fi tted with threaded hole
wheel, ensure that the thread in the wheel is long
enough to accept the spindle length.
Do not use cutting off wheel for side grinding.
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. Confi rm the push button
Confi rm that the push button is disengaged by
pushing push button two or three times before
switching the power tool on (See Fig. 2).
8. Fixing the side handle
Screw the side handle into the gear cover.
grinding
G12SN
840 W
10000/min
125 × 22.23 mm
80 m/s
1.6 kg
English
G13SN
6