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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.
•
Maintain a firm grip on the power tool and
posi-tion 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.
• Never place your hand near the rotating acces-
sory. Accessory may kickback over your hand.
• 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.
• 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.
• Do not attach a saw chain woodcarving blade,
segmented diamond wheel with a peripheral gap
greater than 10 mm or toothed saw blade. Such
blades create frequent kickback and loss of control.
Safety Warnings Specific for Grinding and
Cutting-Off Operations:
•
Use only wheel types that are specified 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.
The grinding surface of 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.
• 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 opera-
tor from broken wheel fragments, accidental contact
with wheel and sparks that could ignite clothing.
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
shatter.
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.
• 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.
• When using dual purpose wheels always use
the correct guard for the application being per-
formed. Failure to use the correct guard may not
provide the desired level of guarding, which could
lead to serious injury.
Additional
Cutting-Off Operations:
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.
•
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.
When 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
Investigate and take corrective action to eliminate
the cause of wheel binding.
Do not restart the cutting operation in the
•
workpiece. Let the wheel reach full speed and
carefully re-enter the cut. The wheel may bind,
walk up or kickback if the power tool is restarted in
the workpiece.
Support panels or any oversized workpiece to
•
minimise 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.
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.
Do
not
•
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
Operations:
• Use proper sized sanding disc paper. Follow
manufacturers recommendations, when select-
ing sanding paper. Larger sanding paper extend-
ing 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:
• Be aware that wire bristles are thrown by the
them to
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.
• If the use of a guard is recommended 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.
4
Safety
Warnings
otherwise
kickback
attempt
to
do
Warnings
Specific
Specific
for
may
occur.
curved
cutting.
for
Sanding
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