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d) Use special care when working corners, sharp
edges, etc. Avoid bouncing and snagging the
insertion tool.
Corners, sharp edges or bounc-
ing have a tendency to snag the rotating insertion
tool and cause loss of control or kickback.
e) Do not attach a saw chain blade for wood-cut-
ting, a segmented diamond saw blade with a
segment distance of more than 10 mm or a
toothed saw blade.
Such insertion tools 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 de
-
signed for the selected wheel.
Wheels for which
the power tool was not designed cannot be ade-
quately shielded and are unsafe.
b) Depressed centre grinding wheels must be
mounted in such a way that their grinding sur-
face does not protrude above the plane of the
guard edge.
An improperly mounted wheel that
protrudes above the plane of the guard edge can-
not be adequately shielded.
c) The guard must be securely attached to the
power tool and positioned for maximum safe-
ty, so the least amount of wheel is exposed to-
wards the operator.
The guard helps to protect
the operator from broken wheel fragments, acci-
dental 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 a 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 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.
f) Do not use worn down wheels from larger
power tools.
Wheels intended for larger pow
-
er tool are not suitable for the higher speed of a
smaller tool and may burst.
g) When using wheels for a dual purpose, always
choose the appropriate guard for the applica-
tion being carried out.
Failure to use the proper
guard may result in ineffective shielding and in
serious injuries.
l) Never lay the power tool down until the inser-
tion tool has come to a complete stop.
The ro-
tating insertion tool may grab the surface and pull
the power tool out of your control.
m) Do not run the power tool while carrying it at
your side.
Accidental contact with the rotating in-
sertion tool could snag your clothing, pulling the
insertion tool into your body.
n) Regularly clean the power tool’s air vents.
The
motor’s fan will draw the dust inside the housing
and excessive accumulation of powdered metal
may cause electrical hazards.
o)
Do not operate the power tool near flammable
materials.
Sparks could ignite these materials.
p) Do not use insertion tools that require liquid
coolants.
Using water or other liquid coolants
may result in electric shock.
Kickback and related safety warnings
Kickback is a sudden reaction to a pinched or
snagged rotating insertion tool, such as a grinding
wheel, grinding pad, brush wire, etc. Pinching or
snagging causes the rotating insertion tool to stop
abruptly which in turn causes the uncontrolled power
tool to be forced in the direction opposite of the inser-
tion tool’s rotation at the point of the binding.
For example, if a grinding wheel is snagged or
pinched by the workpiece, the edge of the grinding
wheel which is entering into the workpiece may be
-
come caught causing the grinding wheel to break off
or kick back. The grinding wheel then either jumps
toward or away from the operator, depending on
the direction of the wheels’ movement at the point
of pinching. Grinding wheels may also break under
these conditions.
Kickback is the result of power tool misuse and/or in
-
correct operating procedures or conditions. It can be
avoided by taking proper precautions as given below.
a)
Maintain a firm grip on the power tool and po
-
sition your body and arm to allow you to resist
kickback forces. Always use auxiliary handle,
if provided, for maximum control over kick-
back or torque reaction during start-up.
The
operator can control torque reactions or kickback
forces, if proper precautions are taken.
b) Never place your hand near the rotating inser-
tion tool.
Insertion tool may kickback over your
hand.
c) Do not position your body in the area where
power tool will move if kickback occurs.
Kick
-
back will propel the tool in the direction opposite
to the wheel’s movement at the point of snagging.
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