Bosch Professional GKT 18V-52 GC Original Instructions Manual page 20

20 | English
Hold the power tool by insulated gripping surfaces,
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when performing an operation where the cutting tool
may contact hidden wiring. Contact with a "live" wire
will also make exposed metal parts of the power tool "live"
and could give the operator an electric shock.
When ripping always use a rip fence or straight edge
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guide. This improves the accuracy of cut and reduces the
chance of blade binding.
Always use blades with correct size and shape (dia-
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mond versus round) of arbour holes. Blades that do not
match the mounting hardware of the saw will run off-
centre, causing loss of control.
Never use damaged or incorrect blade washers or
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bolt. The blade washers and bolt were specially designed
for your saw, for optimum performance and safety of op-
eration.
Kickback causes and related warnings
- kickback is a sudden reaction to a pinched, jammed or mis-
aligned saw blade, causing an uncontrolled saw to lift up and
out of the workpiece toward the operator;
- when the blade is pinched or jammed tightly by the kerf
closing down, the blade stalls and the motor reaction drives
the unit rapidly back toward the operator;
- if the blade becomes twisted or misaligned in the cut, the
teeth at the back edge of the blade can dig into the top sur-
face of the wood causing the blade to climb out of the kerf
and jump back toward the operator.
Kickback is the result of saw misuse and/or incorrect operat-
ing procedures or conditions and can be avoided by taking
proper precautions as given below.
Maintain a firm grip on the saw and position your arms
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to resist kickback forces. Position your body to either
side of the blade, but not in line with the blade. Kick-
back could cause the saw to jump backwards, but kick-
back forces can be controlled by the operator, if proper
precautions are taken.
When blade is binding, or when interrupting a cut for
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any reason, release the trigger and hold the saw mo-
tionless in the material until the blade comes to a com-
plete stop. Never attempt to remove the saw from the
work or pull the saw backward while the blade is in
motion or kickback may occur. Investigate and take cor-
rective actions to eliminate the cause of blade binding.
When restarting a saw in the workpiece, centre the
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saw blade in the kerf so that the saw teeth are not en-
gaged into the material. If a saw blade binds, it may walk
up or kickback from the workpiece as the saw is restar-
ted.
Support large panels to minimise the risk of blade
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pinching and kickback. Large panels tend to sag under
their own weight. Supports must be placed under the
panel on both sides, near the line of cut and near the edge
of the panel.
Do not use dull or damaged blades. Unsharpened or im-
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properly set blades produce narrow kerf causing excess-
ive friction, blade binding and kickback.
1 609 92A 4XT | (11.02.2020)
Blade depth and bevel adjusting locking levers must
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be tight and secure before making the cut. If blade ad-
justment shifts while cutting, it may cause binding and
kickback.
Use extra caution when sawing into existing walls or
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other blind areas. The protruding blade may cut objects
that can cause kickback.
Guard function
Check the guard for proper closing before each use.
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Do not operate the saw if the guard does not move
freely and enclose the blade instantly. Never clamp or
tie the guard so that the blade is exposed. If the saw is
accidentally dropped, the guard may be bent. Check to
make sure that the guard moves freely and does not touch
the blade or any other part, in all angles and depths of
cut.
Check the operation and condition of the guard return
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spring. If the guard and the spring are not operating
properly, they must be serviced before use.The guard
may operate sluggishly due to damaged parts, gummy de-
posits, or a build-up of debris.
Assure that the base plate of the saw will not shift
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while performing a "plunge cut". Blade shifting side-
ways will cause binding and likely kick back.
Always observe that the guard is covering the blade
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before placing the saw down on bench or floor. An un-
protected, coasting blade will cause the saw to walk back-
wards, cutting whatever is in its path. Be aware of the
time it takes for the blade to stop after switch is released.
Additional safety warnings
Do not allow the chip ejector to come into contact with
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your hands. You may be injured by rotating parts.
Do not use the saw above the level of your head. Doing
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so will mean you have inadequate control of the power
tool.
Use suitable detectors to determine if there are hid-
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den supply lines or contact the local utility company
for assistance. Contact with electric cables can cause
fire and electric shock. Damaging gas lines can lead to ex-
plosion. Breaking water pipes causes property damage.
Secure the workpiece. A workpiece clamped with
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clamping devices or in a vice is held more secure than by
hand.
Hold the power tool firmly with both hands and make
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sure you have a stable footing. The power tool can be
more securely guided with both hands.
Do not operate the power tool when stationary . It is
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not suitable for operation with a saw table.
Do not use HSS saw blades. Such saw blades can easily
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break.
Do not saw any ferrous metals. Hot chips may ignite the
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dust extractor.
Wear a dust mask.
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In case of damage and improper use of the battery, va-
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pours may be emitted. The battery can set alight or ex-
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