Standard Accessories; Prior To Operation - Hitachi Koki G 12VA Instrucciones De Manejo

SPECIFICATIONS
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.
Electronic Control
The grinder has an electronic speed control which provides:
○ Full speed at all times in the range up to rated load.
○ Soft-start.
○ Variable speed
○ Kickback Protection
The kickback protection feature cuts off the power to the
motor and stops the power tool in the event of a sudden
drop in the rotational speed of the wheel during operation
(for example, if the wheel locks during cutting operation,
etc.).
○ 0 Voltage Re-start Protection
The 0 voltage restart protection feature prevents the
power tool from restarting after the power has been
temporarily cut off during operation.
○ Overload Protection
The overload protection feature shuts off the power
to the motor in the event of overloading of the motor
or a conspicuous reduction in rotational speed during
operation.
NOTE
The grinder is equipped with a rotational speed control
circuit. The rotational speed may fl uctuate slightly due to
the conditions of use and working voltage.

STANDARD ACCESSORIES

(1) Depressed center wheel ...............................................1
(2) Wrench .........................................................................1
(3) Side handle ...................................................................1
(4) Hex. bar wrench ............................................................1
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.
○ 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 specifi ed on the product
nameplate.
NOTE
When connected to the power supply, the built-in
electronic control circuit shifts to standby status and
the grinder becomes slightly warm, but this is not a
malfunction.
127 V
1500 W
2800–10500/min
115 × 22.23 mm
80 m/s
2.0 kg
CAUTION
Do not operate from a direct current power source, engine
generator, booster or any other type of transformer.
Doing so may not only cause damage to the grinder, but
may lead to accidents.
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.
When the kickback protection, 0 voltage re-start protection
or overload protection feature has been activated, return
the power switch to the OFF position and wait for 1
second or more before re-starting the power tool.
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 be shattered during
operation. Ensure that the wheel guard is properly fi tted
and fastened before commencing grinding operation.
[How to attach and adjust the wheel guard] (Fig. 2)
○ Set the wheel ass'y to the packing gland.
○ Tighten M5 screw to secure the wheel guard while the
lever is in closed position.
○ Perform the adjustment of the wheel guard while the
lever is released. (Loosen M5 screw and readjust if the
wheel guard does not rotate smoothly.)
○ After adjustment, if grinder operation is required, perform
the operation only after setting the lever in closed
position.
○ Lubricate the sliding section of the set piece (B) and the
lever if the lever does not move smoothly.
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
ACCESSORIES".
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.
English
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