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workpiece feeding force between the
fence and the saw blade. Use a push
stick when the distance between the
fence and the saw blade is less than
150mm, and use a push block when
this distance is less than 50mm.
“Work
helping” devices will keep your hand at a
safe distance from the saw blade.
e) Use only the push stick provided by
the manufacturer or constructed in
accordance with the instructions.
This
push stick provides sufficient distance of
the hand from the saw blade.
f) Never use a damaged or cut push stick.
A damaged push stick may break causing
your hand to slip into the saw blade.
g) Do not perform any operation
“freehand”. Always use either the rip
fence or the mitre gauge to position
and guide the workpiece.
“Freehand”
means using your hands to support or
guide the workpiece, in lieu of a rip fence
or mitre gauge. Freehand sawing leads to
misalignment, binding and kickback.
h) Never reach around or over a rotating
saw blade.
Reaching for a workpiece may
lead to accidental contact with the moving
saw blade.
i) Provide auxiliary workpiece support
to the rear and/or sides of the saw
table for long and/or wide workpieces
to keep them level.
A long and/or wide
workpiece has a tendency to pivot on the
table’s edge, causing loss of control, saw
blade binding and kickback.
j) Feed workpiece at an even pace. Do
not bend or twist the workpiece. If
jamming occurs, turn the tool off
immediately, unplug the tool then
clear the jam.
Jamming the saw blade by
the workpiece can cause kickback or stall
the motor.
k) Do not remove pieces of cut-off
material while the saw is running.
The
material may become trapped between the
fence or inside the saw blade guard and the
saw blade pulling your fingers into the saw
blade. Turn the saw off and wait until the
saw blade stops before removing material.
l) Use an auxiliary fence in contact with
the table top when ripping workpieces
less than 2mm thick.
A thin workpiece
may wedge under the rip fence and create
a kickback.
3) Kickback causes and related warnings
Kickback is a sudden reaction of the
workpiece due to a pinched, jammed
saw blade or misaligned line of cut in the
workpiece with respect to the saw blade or
when a part of the workpiece binds between
the saw blade and the rip fence or other fixed
object.
Most frequently during kickback, the
workpiece is lifted from the table by the rear
portion of the saw blade and is propelled
towards the operator.
Kickback is the result of saw misuse and/or
incorrect operating procedures or conditions
and can be avoided by taking proper
precautions as given below.
a) Never stand directly in line with the
saw blade. Always position your body
on the same side of the saw blade
as the fence.
Kickback may propel the
workpiece at high velocity towards anyone
standing in front and in line with the saw
blade.
b) Never reach over or in back of the
saw blade to pull or to support the
workpiece.
Accidental contact with the
saw blade may occur or kickback may drag
your fingers into the saw blade.
c) Never hold and press the workpiece
that is being cut off against the
rotating saw blade
. Pressing the
workpiece being cut off against the saw
blade will create a binding condition and
kickback.
d) Align the fence to be parallel with the
saw blade.
A misaligned fence will pinch
the workpiece against the saw blade and
create kickback.
e) Use a featherboard to guide the
workpiece against the table and fence
when making non-through cuts such
as rabbeting, dadoing or resawing
cuts.
A featherboard helps to control the
workpiece in the event of a kickback.
f) Use extra caution when making a
cut into blind areas of assembled
workpieces.
The protruding saw blade
