Bosch 21 U Gebruiksaanwijzing - Pagina 20
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20 | English
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 In
correct operating procedures or conditions and can
be avoided by taking proper precautions as given
below.
a) Maintain a firm grip on the power tool and
position your body and arm 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. The accessory may kickback over your
hand.
c) Do not position your body in the area where the
power tool will move if kickback occurs. Kickback
will propel the tool in the 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 over the power tool.
Safety warnings specific for grinding and
abrasive cutting off operations
a) Always use the guard designed for the type of
wheel you are using. 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
and accidental contact with the wheel.
b) 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.
c) 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.
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
F 000 622 213 | 09.2008
wheel flanges.
e) Do not use worn down wheels from larger power
tools. A wheel intended for a 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 the 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 re-enter 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.
Safety warnings specific for sanding
operations
a) When sanding, do not use excessively oversized
sanding disc paper. Follow the manufacturers'
recommendations when selecting sanding paper.
Larger sanding paper extending 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 thrown 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
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