Kickback And Related Warnings - DeWalt D28730 Instructions Manual

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 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 the cut. The wheel may bind, walk up
or kickback if the power tool is restarted in the workpiece.
g ) Support 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.
Additional Safety Instructions for Chopsaws
• Always wear proper eye and respiratory protection and
a leather apron.
• Before using, inspect the cutting wheel for cracks or
flaws. If such a crack or flaw is evident, discard the
wheel. The wheel should also be inspected whenever
you think the tool may have been dropped. Flaws may
cause wheel breakage.
When starting the tool with a new or replacement
•
wheel or if you are unsure of the condition of the wheel,
hold the tool in a well protected area and let it run for
one minute. If the wheel has an undetected crack or flaw, it
should burst in less than one minute. Never start the tool with
a person in line with the wheel. This includes the operator.
• In operation, avoid bouncing the wheel or giving it
rough treatment. If this occurs, stop the tool and inspect the
wheel for cracks or flaws.
• Clean your chop saw periodically following the procedure in
this manual.
• Never use the machine without the guards in place.
• Do not remove base.
• Cut-off machines shall be provided with the means to
facilitate the fixing of the machine to a bench to prevent
sliding; e.g. by providing holes or clamping surfaces in
the base.
• ALWAYS USE THE VISE OR SPECIAL FIXTURE TO CLAMP
WORK SECURELY. Other aids such as spring, bar, or C-clamps
may be appropriate for certain sizes and shapes of workpiece.
Use care in selecting and placing these clamps and make a dry
run before making a cut.
• Use only 355 mm type 1 wheels rated at 4000 rpm or higher.
• Allow cut off parts to cool before handling.
• Do not attempt to cut wood or plastic with this tool.
• NEVER CUT MAGNESIUM WITH THIS TOOL.
• Use chop saw in a well-ventilated area.
• Turn chop saw off before removing any pieces from the base.
• DO NOT CUT ELECTRICALLY LIVE MATERIAL.
• Do not use circular saw blades or any other toothed
blades with this tool. Serious injury may result.
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