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For example, if an abrasive wheel is snagged or pinched by the
workpiece, the edge of the wheel that is entering into the pinch
point can dig into the surface of the material causing the wheel
to climb out or kick out. The wheel may either jump toward or
away from the operator, depending on direction of the wheel's
movement at the point of pinching. Abrasive wheels may also
break under these conditions.
Kickback is the result of power tool misuse and/or incorrect
operating procedures or conditions and can be avoided by taking
proper precautions as given below.
a) Maintain a firm grip with both hands on the power
tool and position your body and arms to allow you to
resist kickback forces. Always use auxiliary handle, if
provided, for maximum control over kickback 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 accessory.
Accessory may kickback over your hand.
c) Do not position your body in the area where power
tool will move if kickback occurs. Kickback will propel the
tool in direction opposite to the wheel's movement at the point of
snagging.
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 specified for your
power tool and the specific guard designed for the selec-
ted wheel. Wheels for which the power tool was not designed
cannot be adequately guarded and are unsafe.
b) The grinding surface of the centre 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 the operator from broken wheel fragments,
accidental contact with wheel and sparks that could ignite clothing.
d) Wheels must be used only for specified 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 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. A wheel intended for larger power tool is not suitable for
the higher speed of a smaller tool and may burst.
g) When using dual purpose wheels always use the
correct guard for the application being performed.
Failure to use the correct guard may not provide the desired level
of guarding, which could lead to serious injury.
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Additional safety warnings specific for
abrasive cutting-off operations:
a) Do not "jam" the cutting disc 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, a potential kickback may propel
the spinning wheel and the power tool directly at you.
c) When the wheel is binding or when interrupting a
cut for any reason, switch off the power tool and hold
it 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 work-
piece. Let the wheel reach full speed and carefully
re-enter the cut. The wheel may jam, walk up or kickback if the
power tool is restarted in the workpiece.
e) Support panels or any oversized workpiece to mini-
mise 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.
g) Do not attempt to do curved cutting. 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, which can lead to serious injury.
Safety warnings specific for sanding
operations:
a) Use proper sized sanding disc paper. Follow manufac-
turers recommendations, when selecting sanding paper.
Larger sanding paper extending too far beyond the sanding pad
presents a laceration hazard and may cause snagging, tearing of
the disc or kickback.
Safety warnings specific for wire
brushing operations:
a) Be aware that wire bristles are lost by the brush even
during ordinary operation. Do not overstress the wires
by applying excessive load to the brush. The wire bristles
can easily penetrate light clothing and/or skin.
b) If the use of a guard is specified for wire brushing, do
not allow any interference of the wire wheel or brush
with the guard. Wire wheel or brush may expand in diameter
due to work load and centrifugal forces.
Additional Safety and Working
Instructions
Always check if the spindle lock button is fully released before
switching on the tool! After using the spindle lock to tighten /
loosen the abrasive disc, it is possible that the button may stick in
