Safety Warnings Specific For Grinding And Abrasive Cutting-Off Operations; Additional Safety Warnings Specific For Abrasive Cutting-Off Operations; General Safety Instructions For Grinders - Hitachi G18ST Instruction Manual

d) Use special care when working corners, sharp
edges etc. Avoid bouncing and snagging the
accessory.
Corners, sharp edges or bouncing have a tendency
to snag the rotating accessory and cause loss of
control or kickback.
e) Do not attach a saw chain woodcarving blade
or toothed saw blade.
Such blades create frequent kickback and loss of
control.
SAFETY WARNINGS SPECIFIC FOR
GRINDING AND ABRASIVE CUTTING-OFF
OPERATIONS
a) Use only wheel types that are recommended
for your power tool and the specific guard
designed for the selected wheel.
Wheels for which the power tool was not designed
cannot be adequately guarded and are unsafe.
b) The grinding surface of center depressed
wheels must be mounted below the plane of
the guard lip.
An improperly mounted wheel that projects through the
plane of the guard lip cannot be adequately protected.
c) 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, accidental contact with wheel and
sparks that could ignite clothing.
d) 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.
e) Always use undamaged wheel fl anges 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 fl anges.
f) 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 binding 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 fi tted
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 fi tted with threaded hole
wheel, ensure that the thread in the wheel is long
enough to accept the spindle length;
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