Cut-Off Machine Safety Warnings; Kickback And Related Warnings - DeWalt D28730 Instructions Manual

ENGLISH
SAFETY INSTRUCTIONS FOR CUT-OFF
MACHINES

Cut-Off Machine Safety Warnings

a ) Position yourself and bystanders away from the
plane of the rotating wheel. The guard helps to protect
the operator from broken wheel fragments and accidental
contact with wheel.
b ) Use only bonded reinforced wheels for your power
tool. Just because an accessory can be attached to your
power tool, it does not assure safe operation.
c ) The rated speed of the accessory must be at least
equal to the maximum speed marked on the power
tool. Accessories running faster than their rated speed can
break and fly apart.
d ) Wheels must be used 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.
e ) Always use undamaged wheel flanges that are of
correct diameter for your selected wheel. Proper wheel
flanges support the wheel thus reducing the possibility of
wheel breakage.
f ) The outside diameter and the thickness of your
accessory must be within the capacity rating of
your power tool. Incorrectly sized accessories cannot be
adequately guarded or controlled.
g ) The arbour size of wheels and flanges must properly
fit the spindle of the power tool. Wheels and flanges
with arbour holes that do not match the mounting
hardware of the power tool will run out of balance, vibrate
excessively and may cause loss of control.
h ) Do not use damaged wheels. Before each use, inspect
the wheels for chips and cracks. If the power tool or
wheel is dropped, inspect for damage or install an
undamaged wheel. After inspecting and installing
the wheel, position yourself and bystanders away
from the plane of the rotating wheel and run the
power tool at maximum no load speed for one
minute. Damaged wheels will normally break apart
during this test time.
i ) Wear personal protective equipment. Depending
on application, use face shield, safety goggles or
safety glasses. As appropriate, wear dust mask,
hearing protectors, gloves and shop apron capable
of stopping small abrasive or workpiece fragments.
The eye protection must be capable of stopping flying
debris generated by various operations. The dust mask or
respirator must be capable of filtrating particles generated
by your operation. Prolonged exposure to high intensity
noise may cause hearing loss.
j ) Keep bystanders a safe distance away from work
area. Anyone entering the work area must wear
personal protective equipment. Fragments of workpiece
6
or of a broken wheel may fly away and cause injury beyond
immediate area of operation.
k ) Position the cord clear of the spinning accessory. If
you lose control, the cord may be cut or snagged and your
hand or arm may be pulled into the spinning wheel.
l ) Regularly clean the power tool's air vents. The
motor' s fan can draw the dust inside the housing and
excessive accumulation of powdered metal may cause
electrical hazards.
m ) Do not operate the power tool near flammable
materials. Do not operate the power tool while
placed on a combustible surface such as wood. Sparks
could ignite these materials.
n ) Do not use accessories that require liquid coolants.
Using water or other liquid coolants may result in
electrocution or shock.

Kickback and Related Warnings

Kickback is a sudden reaction to a pinched or snagged rotating
wheel. Pinching or snagging causes rapid stalling of the rotating
wheel which in turn causes the uncontrolled cutting unit to be
forced upwards toward the operator.
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. 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 firm grip on the power tool and position
your body and arm to allow you to resist kickback
forces. The operator can control upward kickback forces, if
proper precautions are taken.
b ) Do not position your body in line with the rotating
wheel. If kickback occurs, it will propel the cutting unit
upwards toward the operator.
c ) Do not attach a saw chain, woodcarving blade,
segmented diamond wheel with a peripheral gap
greater than 10 mm or toothed saw blade. Such blades
create frequent kickback and loss of control.
d ) Do not "jam" the 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.
e ) When the wheel is binding or when interrupting a cut
for any reason, switch off the power tool and hold
the cutting unit motionless until the wheel comes to
a complete stop. Never attempt to remove the 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.
f ) Do not restart the cutting operation in the workpiece.
Let the wheel reach full speed and carefully re-enter