KNOVA KN AG-450 Manual page 5

KICKBACK WARNINGS
Additional Safety Warnings Specific for
Abrasive Cutting-Off Operations:
a) Do not "jam" the 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 binding of the wheel in
the cut and the possibility of kickback
or wheel breakage.
b) Do not position your body in line with
and behind the rotating wheel. When
the wheel, at the point of operation,
is moving away from your body, the
possible kickback may propel the
spinning wheel and the power tool
directly at you.
c) When wheel is binding 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 binding.
d) Do not restart the cutting operation
in the workpiece. Let the wheel reach
full speed and carefully reenter the cut.
The wheel may bind, walk up or
kickback if the power tool is restarted
in the workpiece.
e) Support panels or any oversized
workpiece to minimize the risk of
wheel pinching and kickback. Large
ADDITIONAL SAFETY REGULATIONS:
a) Wear safety goggles.
b) Use suitable detectors to determine
if utility lines are hidden in the work
area or call the local utility company
for assistance. Contact with electric
lines can lead to fire and electric shock.
Damaging a gas line can lead to explosion.
Penetrating a water line causes property
damage or may cause an electric shock.
c) Release the On/Off switch and set it to
the off position when the power supply
is interrupted, e. g., in case of a power
failure or when the mains plug is pulled.
This prevents uncontrolled restarting.
d) When working stone, use dust
extraction.The vacuum cleaner must
be approved for the extraction of stone
dust. Using this equipment reduces
dust-related hazards.
work pieces 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.
f) 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.
Safety Warnings Specific for Sanding
Operations:
a) Do not use excessively oversized
sanding disc paper. Follow manufacturer's
recommendations, when selecting
sanding paper. Larger sanding paper
extending beyond the sanding pad
presents a laceration hazard and
may cause snagging, tearing of the
disc or kickback.
Safety Warnings Specific for Wire
Brushing Operations:
a) Be aware that wire bristles are thrown
by the brush even during ordinary
operation. Do not overstress the wires
by applying excessive load to the
brush. The wire bristles can easily
penetrate light clothing and/or skin.
b) If the use of a guard is recommended
for wire brushing, do not allow any
interference of the wire wheel or brush
with the guard. Wire wheel or brush
may expand in diameter due to work
load and centrifugal forces.
e) Use a cutting guide when cutting stone.
Without sideward guidance, the cutting
disc can jam and cause kickback.
f) When working with the machine,
always hold it firmly with both hands
and provide for a secure stance. The
power tool is guided more secure
with both hands.
g) Secure the work piece. A workpiece
clamped with clamping devices or in a
vice is held more secure than by hand.
h) Keep your workplace clean. Blends of
materials are particularly dangerous.
Dust from light alloys can burn or explode.
i) Never use the machine with a damaged
cable. Do not touch the damaged cable
and pull the mains plug when the cable
is damaged while working. Damaged
cables increase the risk of an electric
shock.