Milwaukee 2784-20 Manual Del Operador página 4

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 enter-
ing 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 move-
ment at the point of pinching. Abrasive wheels may
also break under these conditions. Kickback is the
result of power tool misuse and/or incorrect operat-
ing procedures or conditions and can be avoided by
taking proper precautions as given below.
• Maintain a firm grip on the power tool and posi-
tion your body and arm to allow you to resist
kickback forces. The operator can control kickback
forces, if proper precautions are taken.
• Use special care when working corners, sharp
edges etc. Avoid bouncing and snagging the ac-
cessory. Corners, sharp edges or bouncing have a
tendency to snag the rotating accessory and cause
loss of control or kickback.
• Do not attach a toothed saw blade. Such blades
create frequent kickback and loss of control.
• 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.
• When using rotary files, 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 the
rotary file, high-speed cutters or tungsten carbide
cutter grabs, it may jump from the groove and you
could lose control of the tool.
Safety Warnings Specific for Grinding and Abra-
sive Cutting-Off Operations:
• 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.
• 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.
• 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.
• 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.
• When wheel is pinched, snagged or when in-
terrupting 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.
• 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.
• Support panels or any oversized workpiece to
minimize the risk of wheel pinching and kick-
back. 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.
• Use extra caution when making a "pocket cut"
into existing walls or other blind areas. The pro-
truding wheel may cut gas or water pipes, electrical
wiring or objects that can cause kickback.
Safety Warnings Specific for Wire Brushing
Operations:
• 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.
• Allow brushes to run at operating speed for at
least one minute before using them. During this
time no one is to stand in front or in line with the
brush. Loose bristles or wires will be discharged
during the run-in time.
• Direct the discharge of the spinning wire brush
away from you. Small particles and tiny wire frag-
ments may be discharged at high velocity during the
use of these brushes and may become imbedded
in your skin.
Additional Safety Warnings
• Maintain labels and nameplates. These carry
important information. If unreadable or missing,
contact a MILWAUKEE service facility for a free
replacement.
•
Some dust created by power sand-
WARNING
ing, sawing, grinding, drilling, and
other construction activities contains chemicals
known to cause cancer, birth defects or other repro-
ductive harm. Some examples of these chemicals
are:
• lead from lead-based paint
• crystalline silica from bricks and cement and other
masonry products, and
• arsenic and chromium from chemically-treated
lumber.
Your risk from these exposures varies, depending
on how often you do this type of work. To reduce
your exposure to these chemicals: work in a well
ventilated area, and work with approved safety
equipment, such as those dust masks that are spe-
cially designed to filter out microscopic particles.
4