Kickback And Related Warnings - Dremel 8220 Manual De Instrucciones

tendency to roll while being cut, and may cause the bit to
bind or jump toward you.
m. 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 accessory.
n. Never lay the power tool down until the accessory has
come to a complete stop. The spinning accessory may
grab the surface and pull the power tool out of your control.
o. After changing the bits or making any adjustments,
make sure the collet nut, chuck or any other adjustment
devices are securely tightened. Loose adjustment devices
can unexpectedly shift, causing loss of control, loose
rotating components will be violently thrown.
p. Do not run the power tool while carrying it at your side.
Accidental contact with the spinning accessory could snag
your clothing, pulling the accessory into your body.
q. Regularly clean the power tool's air vents. The motor's
fan will draw the dust inside the housing and excessive
accumulation of powdered metal may cause electrical
hazards.
r. Do not operate the power tool near flammable materials.
Sparks could ignite these materials.
s. 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, 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 firm 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 files, cut-off wheels, high-speed
cutters or tungsten carbide cutters, always have the
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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 file, high-speed cutter or tungsten carbide
cutter grabs, it may jump from the groove and you could lose
control of the tool.
f. Never place your hand near the rotating accessory.
Accessory may kickback over your hand.
g. Do not position your body in the area where power tool
will move if kickback occurs. Kickback will propel the tool
in direction opposite to the wheel's movement at the point of
snagging.
SAFETY WARNINGS SPECIFIC FOR GRINDING
AND ABRASIVE CUTTING-OFF 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.
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6/26/14 1:32 PM