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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 mate-
rials. Sparks could ignite these materials.
p) Do not use tools that require liquid coolants. Using
water or other liquid coolants may result in electrocution
or shock.
4.2 Kickback and Related Warnings
Kickback is a sudden
reaction to a pinched or
snagged rotating wheel, backing pad,
brush or any
other tool. Pinching or snagging
causes rapid stalling of the rotating tool
which in turn causes the uncontrolled
power tool to be forced in
the direction opposite of the tool's rotati
on at the point of the binding. 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 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 positi-
on 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 du-
ring start-up. The operator can control torque reactions
or kickback forces, if proper precautions are taken.
b) Never place your hand near the rotating tool.
Tool 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 direction opposite to the wheel's mo
vement at the point of snagging.
d) Use special care when working corners, sharp edges
etc. Avoid bouncing and snagging the tool.
Corners, sharp edges or bouncing have a tendency to
snag the rotating tool and cause loss of control or kick
back.
e) Do not attach a saw chain woodcarving blade or
toothed saw blade. Such blades create frequent kickback
and loss of control.
4.3 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 designed for the
selected 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 protec
ted.
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 and accidental contact with wheel and sparks
which 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 cutoff 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 pos
sibility of wheel breakage. Flanges for cutoff wheels may
be different from grinding wheel flanges.
f) Do not use worn down wheels from larger power
tools. Wheels intended for larger power tools are not
suitable for the higher speed of a smaller tool and may
burst.
4.4 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 wheel is binding or when interrupting a cut for
any reason, switch off the power tool and hold the pow-
er 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 reenter 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 mi-
nimize 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.
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