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tion manual. Incorrect spacing, position and alignment can
be the reason why the riving knife does not effectively prevent
kickback.
d) For the riving knife to work, it must be able to en-
gage with the workpiece. If the workpiece is too short,
the riving knife will not be able to engage and will be ineffec-
tive. Under these conditions, the riving knife cannot prevent
kickback.
e) Use the appropriate saw blade for the riving knife.
For the riving knife to work properly, the saw blade diameter
must match the corresponding riving knife, the saw blade's
main blade must be thinner than the riving knife and the tooth
width must be greater than the thickness of the riving knife.
2) Safety instructions for sawing procedures
DANGER! Do not put your fi ngers or hands
a)
near the saw blade or in the sawing area. A
moment of inattention or slipping could direct your hand to-
wards the saw blade and cause serious injury.
b) Only feed the workpiece into the saw blade
against the direction of rotation. Feeding the work-
piece in the same direction as the saw blade's direction of
rotation above the table can result in the workpiece and your
hand being pulled into the saw blade.
c) When making longitudinal cuts, never use the
mitre fence to feed the workpiece. When making
cross cuts with the mitre fence, never use the rip
fence in addition to the mitre fence to adjust the
length. Simultaneously guiding the workpiece with the rip
fence and the mitre fence increases the likelihood of the saw
blade jamming and kickback.
d) For longitudinal cuts, always apply the feed force
to the workpiece between the stop rail and the
saw blade. Use a push stick if the distance be-
tween the stop rail and the saw blade is less than
150 mm, and a sliding block if the distance is less
than 50 mm. Work aids such as these ensure that your
hand remains at a safe distance from the saw blade.
e) Only use the push stick supplied by the manufac-
turer or one that has been made according to in-
structions. The push stick ensures there is suffi cient distance
between the hands and the saw blade.
Never use a damaged or sawn push stick. A
f)
damaged push stick can break and cause your hand to get
caught in the saw blade.
g) Do not operate the tool "freehand". Always use
the rip fence or the mitre fence to set up and guide
the workpiece. "Freehand" means supporting or guiding
the workpiece with the hands instead of using a rip fence or
mitre fence. Free-hand sawing leads to misalignment, jam-
ming and kickback.
h) Never reach around or over a rotating saw blade.
Reaching for a workpiece can lead to unintentional contact
with the rotating saw blade.
Support long and/or wide workpieces behind
i)
and/or to the side of the saw table so that they
remain horizontal. Long and/or wide workpieces tend to
tip off the edge of the saw table; this leads to loss of control,
jamming of the saw blade and kickback.
Feed the workpiece evenly. Do not bend or twist
j)
the workpiece. If the saw blade jams, switch off
the power tool immediately, disconnect the mains
plug and rectify the cause of the jamming. Jamming
of the saw blade by the workpiece can lead to kickback or
blocking of the motor.
38
k) Do not remove sawn-off material while the saw is
running. Sawn-off material can get stuck between the saw
blade and the stop rail or in the protective cover. Your fi ngers
can be pulled into the saw blade if you attempt to remove the
sawn-off material. Switch the saw off and wait for the saw
blade to come to a standstill before removing the material.
For longitudinal cuts on workpieces thinner than 2
l)
mm, use an additional rip fence that is in contact
with the table surface. Thin workpieces can get wedged
under the rip fence and cause kickback.
3) Spring-back – causes and corresponding safety
instructions
Kickback is the sudden reaction of the workpiece when the saw
blade becomes hooked or jammed or the workpiece is cut at an
angle to the saw blade. Kickback also occurs when part of the
workpiece is caught between the saw blade and rip fence or an-
other stationary object.
In most cases, when a kickback occurs, the workpiece is caught
by the rear part of the saw blade, lifted off the saw table and
thrown towards the operator.
Kickback is caused by wrongly or incorrectly operating the circu-
lar table saw. It can be avoided by suitable precautionary meas-
ures, such as those described below.
a) Never stand in direct line with the saw blade. Al-
ways keep to the side of the saw blade on which
the stop rail is also located. In the event of a kickback,
the workpiece can be thrown at high speed at people stand-
ing in front of and in line with the saw blade.
b) Never reach over or behind the saw blade to pull
or support the workpiece. Accidental contact with the
saw blade may occur or kickback may cause your fi ngers to
be pulled into the saw blade.
c) Never hold or press the workpiece against the ro-
tating saw blade. Pressing the workpiece against the saw
blade causes jamming and kickback.
d) Align the stop rail parallel to the saw blade. An un-
aligned stop rail presses the workpiece against the saw blade
and causes kickback.
e) Support large plates to reduce the risk of kickback
due to a jammed saw blade. Large plates can bend un-
der their own weight. Plates must be supported wherever they
overhang the table surface.
When sawing workpieces that are twisted, knot-
f)
ted, warped or do not have a straight edge, take
special care to guide them with a mitre fence or
along a stop rail. A warped, knotted or twisted workpiece
is unstable and will cause the kerf to misalign with the saw
blade, causing jamming and kickback.
g) Never saw several workpieces stacked on top of
each other or one behind the other. The saw blade
could catch one or more parts and cause a kickback.
h) If you want to restart a saw whose saw blade is
stuck in the workpiece, centre the saw blade in the
sawing gap so that the teeth are not jammed in
the workpiece. If the saw blade jams, it can lift the work-
piece and cause a kickback when the saw is restarted.
Keep saw blades clean, sharp and suffi ciently set.
i)
Never use warped saw blades or saw blades with
cracked or broken teeth. Sharp and properly set saw
blades minimise jamming, blocking and kickback.
