Bosch GCD 12 JL Professional Notice Originale page 21

ing and installing the saw blade, position yourself and
bystanders away from the plane of the rotating saw
blade and run the power tool at maximum no load
speed for one minute. Damaged saw blades will nor-
mally break apart during this test time.
Kickback and related warnings
Kickback is a sudden reaction to a pinched or snagged rotat-
ing saw blade. Pinching or snagging causes rapid stalling of
the rotating saw blade which in turn causes the uncontrolled
cutting unit to be forced upwards toward the operator.
For example, if a saw blade is snagged or pinched by the
workpiece, the edge of the saw blade that is entering into the
pinch point can dig into the surface of the material causing
the saw blade to climb out or kick out. Saw blades 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 upward kickback forces,
if proper precautions are taken.
Do not position your body in line with the rotating saw
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blade. If kickback occurs, it will propel the cutting unit
upwards toward the operator.
Do not attach a saw chain, woodcarving blade or seg-
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mented diamond wheel with a peripheral gap greater
than 10 mm. Such blades create frequent kickback and
loss of control.
Do not "jam" the saw blade or apply excessive pres-
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sure. Do not attempt to make an excessive depth of
cut. Overstressing the saw blade increases the loading
and susceptibility to twisting or binding of the saw blade
in the cut and the possibility of kickback or saw blade
breakage.
When the saw blade is binding or when interrupting a
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cut for any reason, switch off the power tool and hold
the cutting unit motionless until the saw blade comes
to a complete stop. Never attempt to remove the saw
blade from the cut while the saw blade is in motion
otherwise kickback may occur. Investigate and take
corrective action to eliminate the cause of saw blade
binding.
Do not restart the cutting operation in the workpiece.
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Let the saw blade reach full speed and carefully re-
enter the cut. The saw blade may bind, walk up or kick-
back if the power tool is restarted in the workpiece.
Support any oversized workpiece to minimize the risk
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of saw blade 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 saw blade.
Use clamps to support the workpiece whenever pos-
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sible. If supporting the workpiece by hand, you must
always keep your hand at least 100 mm from either
side of the saw blade. Do not use this saw to cut pieces
Bosch Power Tools
that are too small to be securely clamped or held by
hand. If your hand is placed too close to the saw blade,
there is an increased risk of injury from blade contact.
The workpiece must be stationary and clamped or
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held against both the fence and the table. Do not feed
the workpiece into the blade or cut "freehand" in any
way. Unrestrained or moving workpieces could be thrown
at high speeds, causing injury.
Push the saw through the workpiece. Do not pull the
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saw through the workpiece. To make a cut, raise the
saw head and pull it out over the workpiece without
cutting, start the motor, press the saw head down and
push the saw through the workpiece. Cutting on the
pull stroke is likely to cause the saw blade to climb on top
of the workpiece and violently throw the blade assembly
towards the operator.
Never cross your hand over the intended line of cut-
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ting either in front or behind the saw blade. Supporting
the workpiece "cross handed" i.e. holding the workpiece
to the right of the saw blade with your left hand or vice
versa is very dangerous.
Do not reach behind the fence when the saw blade is
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rotating. Never fail to maintain a safe distance of 100
mm between hand and rotating saw blade (applies to
both sides of the saw blade). It might not be possible to
tell how close the rotating saw blade is to your hand, and
you may be severely injured.
Inspect your workpiece before cutting. If the work-
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piece is bowed or warped, clamp it with the outside
bowed face toward the fence. Always make certain
that there is no gap between the workpiece, fence and
table along the line of the cut. Bent or warped work-
pieces can twist or shift and may cause binding on the
spinning saw blade while cutting. There should be no nails
or foreign objects in the workpiece.
Do not use the power tool until the table is free of
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tools; the workpiece must be the only thing on the
table. Small pieces of scrap or other objects that come
into contact with the rotating blade can be hurled away at
high speed.
Cut only one workpiece at a time. Stacked multiple
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workpieces cannot be adequately clamped or braced and
may bind on the blade or shift during cutting.
Ensure the power tool is mounted or placed on a level,
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firm work surface before use. A level and firm work sur-
face reduces the risk of the power tool becoming un-
stable.
Plan your work. Every time you change the bevel or
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mitre angle setting, make sure the adjustable fence is
set correctly to support the workpiece and will not in-
terfere with the blade or the guarding system. Without
turning the tool "ON" and with no workpiece on the table,
move the saw blade through a complete simulated cut to
assure there will be no interference or danger of cutting
the fence.
Provide adequate support such as table extensions,
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saw horses, etc. for a workpiece that is wider or
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1 609 92A 4SP | (26.02.2019)