P.I.T. PWG125-C, User Manual

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Concrete Grinder
07
The spinning accessory may grab the surface
and pull the power tool out of your control.
► Do not run the power tool while carrying
it at your side. Accidental contact with the
spinning accessory could snag your clothing,
pulling the accessory into your body.
►
Regularly clean the power tool’s air
vents. The motor’s fan will draw the dust in-
side the housing and excessive accumulation
of powdered metal may cause electrical haz-
ards.
► Do not operate the power tool near fl am-
mable materials. Sparks could ignite these
materials.
► Do not use accessories that require
liquid coolants. Using water or other liquid
coolants may result in electrocution or shock.
Kickback and Related Warnings
Kickback is a sudden reaction to a pinched or
snagged rotating wheel, backing pad, brush
or any other accessory. Pinching or snagging
causes rapid stalling of the rotating accessory
which in turn causes the uncontrolled power
tool to be forced in the direction opposite of
the accessory’s rotation 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 move-
ment 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 con-
ditions and can be avoided by taking proper
precautions as given below.
► 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.
►
Never place your hand near the rotating
accessory. Accessory may kickback over
your hand.
► Do not position your body in the area
where power tool will move if kickback oc-
curs. 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 con-
trol or kickback.
► Do not attach a saw chain wood carving
blade or toothed saw blade. Such blades
create frequent kickback and loss of control.
Safety Warnings specific for
Grinding and Abrasive Cutting-Off
operations
► Use only wheel types that are rec-
ommended 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 de-
pressed 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 maxi-
mum safety, so the least amount of wheel
is exposed towards the operator.
The guard helps to protect operator from bro-
ken wheel fragments, accidental contact with
wheel and sparks that could ignite clothing.
► Wheels must be used only for recom-
mended applications. For example: do not
grind with the side of cut- off wheel. Abra-
sive cut-off wheels are intended for peripheral
grinding, side forces applied to these wheels
may cause them to shatter.
► Always use undamaged wheel flanges
that are of correct size and shape for your
selected wheel. Proper wheel flanges sup-
port the wheel thus reducing the possibility of
wheel breakage. Flanges for cut-off wheels
may be diff erent from grinding wheel fl anges.
► Do not use worn down wheels from
larger power tools. Wheel intended for larg-
er power tool is not suit- able for the higher
speed of a smaller tool and may burst.
Additional Safety Warnings spe-
cifi c for Abrasive Cutting Off oper-
ations
► Do not “jam” the cut-off wheel or apply
excessive pressure. Do not attempt to
make an excessive depth of cut. Over-
stressing the wheel increases the loading
and susceptibility to twisting or binding of the