Wurth Master TKS 59-E Instrucciones De Servicio página 18

uncontrolled saw to lift up and out of the work-
piece toward the operator;
- when the blade is pinched or bound 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 surface 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 incor-
rect operating procedures or conditions and can
be avoided by taking proper precautions as given
below.
a) Maintain a fi rm grip with both hands on the
saw and position your arms to resist kick-
back forces. Position your body to either
side of the blade, but not in line with the
blade. Kickback could cause the saw to jump
backwards, but kickback forces can be control-
led by the operator, if proper precautions are
taken.
NOTE: For circular saws with 140 mm or smaller
diameter blades, the words "with both hands"
may be omitted.
b) When blade is binding, or when interrupting
a cut for any reason, release the trigger and
hold the saw motionless in the material until
the blade comes to a complete 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 corrective actions to eliminate the
cause of blade binding.
c) When restarting a saw in the workpiece, cen-
tre the saw blade in the kerf and check that
saw teeth are not engaged into the material.
If saw blade is binding, 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. Unsharp-
ened or improperly set blades produce narrow
kerf causing excessive friction, blade binding
and kickback.
f) Blade depth and bevel adjusting locking
levers must be tight and secure before mak-
ing cut. If blade adjustment shifts while cutting,
it may cause binding and kickback.
18-English
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.
Safety instructions for plunge-type
saws
a) Check guard for proper closing before each
use. Do not operate the saw if guard does
not move freely and enclose the blade in-
stantly. Never clamp or tie the guard with the
blade exposed. If saw is accidentally dropped,
guard may be bent. Check to make sure that
guard moves freely and does not touch the
blade or any other part, in all angles and depths
of cut.
b) Check the operation and condition of the
guard return spring. If the guard and the
spring are not operating properly, they must
be serviced before use. Guard may operate
sluggishly due to damaged parts, gummy de-
posits, or a build-up of debris.
c) Assure that the guide plate of the saw will
not shift while performing the "plunge cut"
when the blade bevel setting is not at 90°.
Blade shifting sideways will cause binding and
likely kick back.
d) Always observe that the guard is covering
the blade before placing saw down on bench
or fl oor. An unprotected, coasting blade will
cause the saw to walk backwards, cutting what-
ever is in its path. Be aware of the time it takes
for the blade to stop after switch is released.
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.
b) Adjust the riving knife as described in this
instruction manual. Incorrect spacing, posi-
tioning and alignment can make the riving knife
ineffective in preventing kickback.
c) Always use the riving knife except when
plunge cutting. Riving knife must be replaced
after plunge cutting. Riving knife causes inter-
ference during plunge cutting and can create
kickback.
d) For the riving knife to work, it must be en-
gaged in the workpiece. The riving knife is
ineffective in preventing kickback during short
cuts.