Metabo G 400 Operating Instructions Manual page 6

en ENGLISH
as dowels, rods or pipes, bear in mind that these
workpieces will tend to roll away from you, thus
possibly jamming the accessory and jerking it
towards you.
m) Position the cord clear of spinning accesso-
ries. If you lose control, the cord may be cut or
snagged and your hand or arm may be pulled into
the spinning accessory.
n) Never lay the power tool down until the
accessory has come to a complete stop. The
spinning accessory may grip the surface and pull
the power tool out of your control.
o) After changing accessories or settings on
the power tool, you must securely tighten the
collet chuck nuts, the chuck and any other
clamping elements. Loose clamping elements
can slip unexpectedly and result in loss of control
over the power tool; unsecured, rotating compo-
nents are then ejected at speed.
p) 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.
q) 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.
r) Do not operate the power tool near flam-
mable materials. Sparks could ignite these mate-
rials.
s) Do not use accessories that require liquid
coolants. Using water or other liquid coolants may
result in electrocution or shock.
3.2 Kickback and Related Warnings
Kickback is a sudden reaction to a pinched or
snagged grinding wheel, abrasive belt, brush or any
other accessory. Pinching or snagging causes the
rotating accessory to stop abruptly, which in turn
causes the uncontrolled power tool to be forced in
the direction opposite the accessory's rotation at
the point of jamming.
For example, if a grinding wheel is snagged or
pinched by the workpiece, the edge of the wheel
penetrating the workpiece may get caught, causing
the grinding wheel to break away or result in kick-
back. The wheel may then be propelled towards or
away from the operator, depending on the direction
of the wheel's movement at the point of pinching.
Grinding wheels may also break under these condi-
tions.
Kickback is the result of power tool misuse and/or
incorrect operating procedures or conditions. It 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. The operator can control
torque reactions or kickback forces, if proper
precautions are taken.
b) Be especially careful when working around
corners, sharp edges etc. Avoid bouncing and
snagging accessories off the workpiece. The
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rotating accessory tends to jam around corners,
sharp edges and in the event of bouncing, thus
causing loss of control or kickback.
c) Do not use a toothed saw blade. Such blades
create frequent kickback and loss of control.
d) Always insert the accessory in the material
in the same direction as the cutting edge
leaves the material (that is, in the same direc-
tion as the swarf is ejected). If you insert the
power tool in the wrong direction, the cutting edge
of the tool will break out of the workpiece, thus
pulling the tool in this advance direction.
e) Always clamp the workpiece securely in
position when using rotary files, small cutting
wheels, high-speed milling tools or hard metal
milling tools. Even if only slightly tilted in the
groove, these tools can get caught and cause kick-
back. A cut-off wheel that get caught usually breaks.
If rotary files, high-speed milling tools or hard metal
milling tools catch, the tooling insert may pop out of
the groove and cause the user to lose control over
the power tool.
3.3 Safety Warnings Specific for Grinding
and Cutting-Off Operations:
a) Only use wheel types that are authorised for
your power tool and only use them for the
recommended applications. For example:
Never grind with the side of a cut-off wheel.
Abrasive cut-off wheels are intended for peripheral
grinding. Lateral forces applied to these wheels
may cause them to shatter.
b) For conical and straight threaded mounted
points, only use mandrels that are undamaged
and of the correct size and length, without
undercuts on the shoulder. Using suitable
mandrels reduces the risk of breakage.
c) 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.
d) Avoid leaving your hands in the area behind
or in front of the rotating cut-off wheel. If you use
your hand to push away the cut-off wheel in the
workpiece, the power tool and the spinning wheel
may be propelled directly towards you in the event
of kickback.
e) If the wheel jams or if you interrupt work 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 the wheel jam.
f) Do not restart the tool while it is still in the
workpiece. Let the wheel reach full speed and
carefully reenter the cut. The wheel may jam,
walk up or kickback if the power tool is restarted in
the workpiece.
g) Make sure that you support panels or any
large workpiece to minimise the risk of kick-