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KICKBACK AND RELATED WARNINGS
Kickback is a sudden reaction to a pinched or snagged
rotating wheel, sanding band, brush or any other accessory.
Pinching or snagging causes rapid stalling of the rotating
accessory which in turn causes the uncontrolled power tool
to be forced in the direction opposite of the accessory's
rotation.
For example, if an abrasive wheel is snagged or pinched
by the workpiece, the edge of the wheel that is entering
into the pinch point can dig into the surface of the material
causing the wheel to climb out or kick out. The wheel may
either jump toward or away from the operator, depending on
direction of the wheel's movement at the point of pinching.
Abrasive wheels may also break under these conditions.
Kickback is the result of power tool misuse and/or incorrect
operating procedures or conditions and can be avoided by
taking proper precautions as given below.
a)
Maintain a fi rm grip on the power tool and position
your body and arm to allow you to resist kickback
forces. The operator can control kickback forces, if
proper precautions are taken.
b)
Use special care when working corners, sharp
edges etc. Avoid bouncing and snagging the
accessory. Corners, sharp edges or bouncing have
a tendency to snag the rotating accessory and cause
loss of control or kickback.
c)
Do not attach a toothed saw blade. Such blades
create frequent kickback and loss of control.
d)
Always feed the bit into the material in the same
direction as the cutting edge is exiting from the
material (which is the same direction as the chips
are thrown). Feeding the tool in the wrong direction
causes the cutting edge of the bit to climb out of the
work and pull the tool in the direction of this feed.
e)
When using rotary fi les, cut-off wheels, high-
speed cutters or tungsten carbide cutters, always
have the work securely clamped. These wheels will
grab if they become slightly canted in the groove, and
can kickback. When a cut-off wheel grabs, the wheel
itself usually breaks. When a rotary fi le, high-speed
cutter or tungsten carbide cutter grabs, it may jump
from the groove and you could lose control of the tool.
SAFETY WARNINGS SPECIFIC FOR
GRINDING OPERATIONS
a)
Use only wheel types that are recommended
for your power tool and only for recommended
applications. For example: do not grind with the
side of a cut-off wheel.
Abrasive cut-off wheels are intended for peripheral
grinding, side forces applied to these wheels may
cause them to shatter.
b)
For threaded abrasive cones and plugs use only
undamaged wheel mandrels with an unrelieved
shoulder flange that are of correct size and
length.
Proper mandrels will reduce the possibility of
breakage.
c)
Do not "jam" a cut-off wheel or apply excessive
pressure. Do not attempt to make an excessive
depth of cut.
Overstressing the wheel increases the loading and
susceptibility to twisting or snagging of the wheel in the
cut and the possibility of kickback or wheel breakage.
d)
Do not position your hand in line with and behind
the rotating wheel.
When the wheel, at the point of operation, is moving
away from your hand, the possible kickback may
propel the spinning wheel and the power tool directly
at you.
e)
When wheel is pinched, snagged or when
interrupting a cut for any reason, switch off the
power tool and hold the power tool motionless
until the wheel comes to a complete stop. Never
attempt to remove the cut-off wheel from the cut
while the wheel is in motion otherwise kickback
may occur.
Investigate and take corrective action to eliminate the
cause of wheel pinching or snagging.
f)
Do not restart the cutting operation in the
workpiece. Let the wheel reach full speed and
carefully re-enter the cut.
The wheel may bind, walk up or kickback if the power
tool is restarted in the workpiece.
g)
Support panels or any oversized workpiece to
minimize the risk of wheel pinching and kickback.
Large workpieces tend to sag under their own weight.
Supports must be placed under the workpiece near
the line of cut and near the edge of the workpiece on
both sides of the wheel.
h)
Use extra caution when making a "pocket cut"
into existing walls or other blind areas.
The protruding wheel may cut gas or water pipes,
electrical wiring or objects that can cause kickback.
GENERAL SAFETY INSTRUCTIONS FOR
CORDLESS GRINDERS
–
Check that speed marked on the wheel is equal to or
greater than the rated speed of the grinder;
–
Ensure that the wheel dimensions are compatible with
the grinder;
–
Abrasive wheels shall be stored and handled with care
in accordance with manufacturer's instructions;
–
Inspect the grinding wheel before use, do not use
chipped, cracked or otherwise defective products;
–
Ensure that mounted wheels and points are fi tted in
accordance with the manufacturer's instructions;
–
Ensure that blotters are used when they are provided
with the bonded abrasive product and when they are
required;
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