Hitachi G 23SS Grinder User Manual


 
English
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b) The guard must be securely attached to the power
tool and positioned for maximum safety, so the
least amount of wheel is exposed towards the
operator.
The guard helps to protect operator from broken
wheel fragments and accidental contact with wheel.
c) Wheels must be used only for recommended
applications. For example: do not grind with the
side of cut-off wheel.
Abrasive cut-off wheels are intended for peripheral
grinding, side forces applied to these wheels may
cause them to shatter.
d) Always use undamaged wheel flanges that are of
correct size and shape for your selected wheel.
Proper wheel flanges support the wheel thus
reducing the possibility of wheel breakage. Flanges
for cut-off wheels may be different from grinding
wheel flanges.
e) Do not use worn down wheels from larger power
tools.
Wheel intended for larger power tool is not suitable
for the higher speed of a smaller tool and may burst.
ADDITIONAL SAFETY WARNINGS
SPECIFIC FOR ABRASIVE CUTTING-OFF
OPERATIONS
a) Do not “jam” the cut-off wheel or apply excessive
pressure. Do not attempt to make an excessive
depth of cut.
Overstressing the wheel increases the loading and
susceptibility to twisting or blinding of the wheel
in the cut and the possibility of kickback or wheel
breakage.
b) Do not position your body in line with and behind
the rotating wheel.
When the wheel, at the point of operation, is
moving away from your body, the possible kickback
may propel the spinning wheel and the power tool
directly at you.
c) When wheel is binding or when interrupting a cut
for any reason, switch off the power tool and hold
the power tool motionless until the wheel comes
to a complete stop. Never attempt to remove the
cut-off wheel from the cut while the wheel is in
motion otherwise kickback may occur.
Investigate and take corrective action to eliminate
the cause of wheel binding.
d) Do not restart the cutting operation in the
workpiece. Let the wheel reach full speed and
carefully reenter the cut.
The wheel may bind, walk up or kickback if the
power tool is restarted in the workpiece.
e) Support panels or any oversized workpiece to
minimize the risk of wheel pinching and kickback.
Large workpieces tend to sag under their own
weight. Supports must be placed under the
workpiece near the line of cut and near the edge
of the workpiece on both sides of the wheel.
f) Use extra caution when making a “pocket cut”
into existing walls or other blind areas.
The protruding wheel may cut gas or water pipes,
electrical wiring or objects that can cause kickback.
GENERAL SAFETY INSTRUCTIONS FOR
GRINDERS
Check that speed marked on the wheel is equal
to or greater than the rated speed of the grinder;
Ensure that the wheel dimensions are compatible
with the grinder;
Abrasive wheels shall be stored and handled with
care in accordance with manufacturer’s instructions;
Inspect the grinding wheel before use, do not use
chipped, cracked or otherwise defective products;
Ensure that mounted wheels and points are fitted
in accordance with the manufacturer’s instructions;
Ensure that blotters are used when they are
provided with the bonded abrasive product and
when they are required;
Ensure that the abrasive product is correctly
mounted and tightened before use and run the
tool at no-load for 30 s 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;
If a guard is equipped with the tool never use the
tool without such a guard;
Do not use separate reducing bushings or adapters
to adapt large hole abrasive wheels;
For tools intended to be fitted with threaded hole
wheel, ensure that the thread in the wheel is long
enough to accept the spindle length;
Check that the work piece is properly supported;
Do not use cutting off wheel for side grinding;
Ensure that sparks resulting from use do not create
a hazard e.g. do not hit persons, or ignite flammable
substances;
Ensure that ventilation openings are kept clear
when working in dusty conditions, if it should
become necessary to clear dust, first disconnect
the tool from the mains supply (use non metallic
objects) and avoid damaging internal parts;
Always use eye and ear protection. Other personal
protective equipment such as dust mask, gloves,
helmet and apron should be worn;
Pay attention to the wheel that continues to rotate
after the tool is switched off.
SPECIFIC SAFETY RULES AND SYMBOLS
1. ALWAYS use proper guard with grinding wheel. A
guard protects operator from broken wheel fragments.
2. Accessories must be rated for at least the speed
recommended on the tool warning label. Wheels
and other accessories running over rated speed
can fly apart and cause injury.
01Eng_G18SS_US 10/2/09, 17:097