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Kickback and the appropriate safety notes
Kickback is a sudden reaction caused as a result of a
jammed or blocked rotating tool, for example, a sand-
ing disc, sanding plate, wire brush etc. Jamming or
blocking causes the rotating tool to come to an abrupt
stop. This causes an uncontrolled power tool to
accelerate against the direction of rotation of the tool
at the blocked point.
For example, if a grinding disc becomes stuck or
blocked in a work piece, the edge of the grinding disc
that dips into the work piece may get caught and the
grinding disc will break away or cause kickback. The
grinding disc will then move towards the operator or
away from them in accordance with the direction of
rotation of the disc at the blocked point. This may also
cause grinding discs to break.
A kickback is a consequence of incorrect or faulty use
of the power tool. It can be prevented by the use of
suitable measures, as described below:
• Hold the power tool securely with both hands
and position your body and arms in such a
way that you are able to absorb any kickback.
Always use the additional handle, if there is
one available, in order to ensure you have the
greatest possible control over kickback
forces or reaction torque when the tool is at
top speed. The operator is able to master kick-
back or reaction forces if they take the appropriate
care.
• Never put your hand close to the rotating tool.
The tool may move over your hand in the event of
kickback.
• Keep your body out of the area that the power
tool would jump to in the event of kickback.
Kickback pushes the power tool in the opposite
direction to the movement of the sanding disc at
the blocked point.
• Be especially careful around corners, sharp
edges etc. Avoid tools bouncing off work
pieces and becoming jammed. The rotating
tool will tend to jam at corners, sharp edges or
when it bumps against something. This will lead to
a loss of control or kickback.
• Do not use chained or toothed saw blades.
Such tools will often cause kickback of the loss of
control over the power tool.
Special safety notes regarding grinding and
abrasive cutting:
• Only use grinding tools permitted for use with
your power tool and the protective hood
designed for use with these tools. Grinding
tools that have not be designed for use with the
power tool cannot be sufficiently shielded and are
thus 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 protective hood must be affixed securely
to the electrical tool and set in such a way that
it ensures the maximum level of safety possi-
ble, i.e. the smallest possible area of the grind-
ing tool is exposed to the operator. The pro-
tective hood should protect the operator from bro-
ken pieces and accidental contact with the grind-
ing tool.
• Grinding tools may only be used for the pur-
poses recommended. For example: Never use
the side surface of a cutting disc to grind.
Cutting discs are designed to be used to remove
material with the edge of the disc. Lateral forces
on these tools may break them.
• Always used undamaged tensioning flanges
in the correct size and shape for the cutting
disc you have selected. Suitable flanges sup-
port the cutting disc and thus reduce the risk of
the disc breaking. Flanges for cutting discs may
differ from flanges for other grinding discs.
• Do not use worn grinding disc from larger
power tools. Grinding discs for larger power
tools are not designed to cope with the higher rev-
olutions of smaller power tools and may break.
Further additional safety notes regarding
abrasive cutting:
• Avoid jamming the cutting disc or applying
too high a pressure. Do not carry out any
excessively deep cuts. Overloading the cutting
disc increases the pressure and the tendency to
tilt or block and thus increases the risk of kickback
or of the disc breaking.
• Avoid the area in front of and behind the rotat-
ing disc. If you operate the device in such a way
that the cutting disc in the work piece is moved
away from you, in the event of kickback, the
power tool and the rotating disc may be thrown
towards you.
• If the cutting disc is jammed or you need to
interrupt your work, switch the power tool off,
and hold it motionless until the disc has come
to a standstill. Never attempt to pull a still
operating cutting disc out of the cut as this
may cause kickback. Investigate and take cor-
rective actions to eliminate the cause of the jam.
• Do not switch the power tool back on as long
as it remains stuck in the work piece. Allow
the cutting disc to achieve the full revolutions
before you continue to cut carefully. Other-
wise, the disc may get caught, jump out of the
work piece or cause kickback.
• Support panels or large work pieces to mini-
mise the risk of kickback caused by a trapped
disc. Large work pieces may bend under their
own weight. The work piece must be supported
on both sides, near the line of cut and near the
edge.
• Be very carefully when making plunge cuts in
existing walls or in other areas that are diffi-
cult to see. The plunging disc may cut into gas or
water pipes, electrical cables or other objects and
cause kickback.
GB
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