Bosch GRO 12V-35 Professional Manual Original página 16

16 | English
Do not run the power tool while carrying it at your
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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
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fan will draw the dust inside the housing and excessive
accumulation of powdered metal may cause electrical
hazards.
Do not operate the power tool near flammable materi-
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als. Sparks could ignite these materials.
Do not use accessories that require liquid coolants.
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Using water or other liquid coolants may result in electro-
cution or shock.
Kickback and related warnings
Kickback is a sudden reaction to a pinched or snagged rotat-
ing wheel, sanding band, brush or any other accessory.
Pinching or snagging causes rapid stalling of the rotating ac-
cessory which in turn causes the uncontrolled power tool to
be forced in the direction opposite of the accessory's rota-
tion.
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 direc-
tion of the wheel's movement at the point of pinching. Abras-
ive 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.
Maintain a firm grip on the power tool and position
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your body and arm to allow you to resist kickback
forces. The operator can control kickback forces, if
proper precautions are taken.
Use special care when working corners, sharp edges
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etc. Avoid bouncing and snagging the accessory.
Corners, sharp edges or bouncing have a tendency to
snag the rotating accessory and cause loss of control or
kickback.
Do not attach a toothed saw blade. Such blades create
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frequent kickback and loss of control.
Always feed the bit into the material in the same dir-
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ection 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.
When using cut-off wheels, always have the work se-
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curely 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
the rotary file, high-speed cutter or tungsten carbide cut-
ter grab, it may jump from the groove and you could lose
control of the tool.
1 609 92A 54U | (26.07.2019)
Safety warnings specific for grinding and abrasive
cutting-off operations
Use only wheel types that are recommended for your
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power tool and only for recommended applications.
For example: do not grind with the side of a cut-off
wheel. Abrasive cut-off wheels are intended for peri-
pheral grinding, side forces applied to these wheels may
cause them to shatter.
For threaded abrasive cones and plugs use only un-
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damaged wheel mandrels with an unrelieved shoulder
flange that are of correct size and length. Proper man-
drels will reduce the possibility of breakage.
Do not "jam" a cut-off wheel or apply excessive pres-
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sure. Do not attempt to make an excessive depth of
cut. Overstressing the wheel increases the loading and
susceptibility to twisting or snagging of the wheel in the
cut and the possibility of kickback or wheel breakage.
Do not position your hand in line with and behind the
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rotating wheel. When the wheel, at the point of opera-
tion, is moving away from your hand, the possible kick-
back may propel the spinning wheel and the power tool
directly at you.
When wheel is pinched, snagged or when interrupting
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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.
Do not restart the cutting operation in the workpiece.
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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.
Support panels or any oversized workpiece to minim-
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ize 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.
Use extra caution when making a "pocket cut" into ex-
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isting walls or other blind areas. The protruding wheel
may cut gas or water pipes, electrical wiring or objects
that can cause kickback.
Safety warnings specific for wire brushing operations
Be aware that wire bristles are thrown by the brush
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even during ordinary operation. Do not overstress the
wires by applying excessive load to the brush. The wire
bristles can easily penetrate light clothing and/or skin.
Allow brushes to run at operating speed for at least
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one minute before using them. During this time no one
is to stand in front or in line with the brush. Loose
bristles or wires will be discharged during the run-in time.
Direct the discharge of the spinning wire brush away
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from you. Small particles and tiny wire fragments may be
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