Additional Safety Precautions - Hilti WSC 255 Bedienungsanleitung

gate and take corrective actions to eliminate the cause
of blade binding.
c)When restarting a saw in the workpiece, centre the
saw blade in the kerf and check that saw teeth are
not engaged into the material. If saw blade is bind-
ing, it may walk up or kickback from the workpiece
as the saw is restarted.
d)Support large panels to minimise the risk of blade
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.
e)Do not use dull or damaged blades. Unsharpened
or improperly set blades produce narrow kerf caus-
ing excessive friction, blade binding and kickback.
f) Blade depth and bevel adjusting locking levers must
be tight and secure before making cut. If blade adjust-
ment shifts while cutting, it may cause binding and
kickback.
g)Use extra caution when making a "plunge cut" into
existing walls or other blind areas. The protruding
blade may cut objects that can cause kickback.
5.1.8 Safety instructions for circular saws with dual
actuation of lower blade guard (both sides of
blade)
a)Check lower guard for proper closing before each
use. Do not operate the saw if lower guard does
not move freely and close instantly. Never clamp
or tie the lower guard into the open position. If saw
is accidentally dropped, lower guard may be bent.
Raise the lower guard with the retracting handle and
make sure it moves freely and does not touch the
blade or any other part, in all angles and depths of
cut.
b)Check the operation of the lower guard spring. If the
guard and the spring are not operating properly, they
must be serviced before use. Lower guard may oper-
ate sluggishly due to damaged parts, gummy deposits,
or a build-up of debris.
c)Lower guard should be retracted manually only for
special cuts such as "plunge cuts" and "compound
cuts." Raise lower guard by retracting handle and
as soon as blade enters the material, the lower guard
must be released. For all other sawing, the lower
guard should operate automatically.
d)Always observe that the lower guard is covering the
blade before placing saw down on bench or floor.
An unprotected, coasting blade will cause the saw to
walk backwards, cutting whatever is in its path. Be
aware of the time it takes for the blade to stop after
switch is released.
5.1.9 Additional safety instructions for all saws with
riving knife
a)Use the appropriate riving knife for the blade being
used. For the riving knife to work, it must be thicker
than the body of the blade but thinner than the tooth
set of the blade.
Printed: 07.07.2013 | Doc-Nr: PUB / 5071323 / 000 / 00
b)Adjust the riving knife as described in this instruc-
tion manual. Incorrect spacing, positioning and align-
ment can make the riving knife ineffective in pre-
venting kickback.
c)Always use the riving knife except when plunge cut-
ting. Riving knife must be replaced after plunge cut-
ting. Riving knife causes interference during plunge
cutting and can create kickback.
d)For the riving knife to work, it must be engaged in
the workpiece. The riving knife is ineffective in pre-
venting kickback during short cuts.
e)Do not operate the saw if riving knife is bent. Even
a light interference can slow the closing rate of a guard.

5.2 Additional safety precautions

5.2.1 Personal safety
a) Wear ear protection. Excessive noise may lead to a
loss of hearing.
b) Use the auxiliary handle supplied with the tool.
Loss of control of the tool may lead to injury.
c) Breathing protection must be worn when the tool is
used without a dust removal system for work that
creates dust.
d) To avoid tripping and falling when working, always
lead the sypply cord, extension cord and dust extrac-
tion hose away tho the rear.
e)Bring the blade into contact with the workpiece only
after the circular saw has been switched on.
f) The area above and below the kerf must be free of
obstructions. Do not saw into screws and nails etc.
g)Do not use the machine for sawing overhead.
h)Do not attempt to brake the speed of the saw blade
by pressing it to the side.
i) Do not use:
– cutting discs designed for use with an angle grinder
– hardened steel saw blades (HSS steel)
j) Do not touch the part of the blade projecting beneath
the workpiece, the clamping flange or the flange
screw.
k)Never press the spindle lockbutton while the blade
is rotating.
l) Operate the tool only together with the applicable
protective devices or equipment.
5.2.2 Power tool use and care
a) Secure the workpiece. Use clamps or a vice to hold
the workpiece in place. The workpiece is thus held
more securely than by hand and both hands remain
free to operate the tool.
b)Ensure that the insert tools used are equipped with
the appropriate connection end system and that they
are properly fitted and secured in the chuck.
c) In the event of a power faillure, switch the tool off
and unplug the supply cord. This prevents inadver-
tent starting when the power returns.
5.2.3 Electrical safety
a) Before beginning work, check the working area (e.g.
with a metal detector) to ensure that no concealed
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