Proxxon IBS/A Manual Del Usuario página 15

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 incorrect operating procedures or conditions
and can be avoided by taking proper precautions
as given below.
a) Maintain a fi rm grip on the power tool and
position your body and arm to allow you to re-
sist kickback forces. The operator can control
kickback forces, if proper precautions are taken.
b) Use special care when working corners, sharp
edges etc. Avoid bouncing and snagging the ac-
cessory. Corners, sharp edges or bouncing have
a tendency to snag the rotating accessory and
cause loss of control or kickback.
c) Do not attach a toothed saw blade. Such bla-
des create frequent kickback and loss of control.
d) Always feed the bit into the material in the
same direction as the cutting edge is exiting
from the material (which is the same direction
as the chips are thrown). Feeding the tool in the
wrong direction causes the cutting edge of the
bit to climb out of the work and pull the tool in
the direction of this feed.
e) When using rotary fi les, cut-off wheels,
high-speed cutters or tungsten carbide cutters,
always have the work securely clamped. These
wheels will grab if they become slightly canted
in the groove, and can kickback. When a cut-off
wheel grabs, the wheel itself usually breaks.
When a rotary fi le, high-speed cutter or tungs-
ten carbide cutter grabs, it may jump from the
groove and you could lose control of the tool.
Safety warnings specifi c for grinding and ab-
rasive cutting-off operations:
a) Use only wheel types that are recommended
for your power tool and only for recommended
All manuals and user guides at all-guides.com
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.
b) For threaded abrasive cones and plugs use
only undamaged wheel mandrels with an un-
relieved shoulder fl ange that are of correct size
and length. Proper mandrels will reduce the pos-
sibility of breakage.
c) Do not "jam" a cut-off wheel or apply ex-
cessive pressure. Do not attempt to make an
excessive depth of cut. Overstressing the wheel
increases the loading and susceptibility to twis-
ting or snagging of the wheel in the cut and the
possibility of kickback or wheel breakage.
d) Do not position your hand in line with and
behind the rotating wheel. When the wheel, at
the point of operation, is moving away from your
hand, the possible kickback may propel the spin-
ning wheel and the power tool directly at you.
e) When wheel is pinched, snagged or when inter-
rupting 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 pinching or snagging.
f) 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.
g) 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 work-
piece near the line of cut and near the edge of the
workpiece on both sides of the wheel.
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