Crown CT23007HX Manual Original página 21

sory contacting a "live" wire may make exposed metal
parts of the power tool "live" and could give the opera-
tor an electric shock�
• Always hold the tool firmly in your hand(s) dur-
ing the start-up. The reaction torque of the motor, as
it accelerates to full speed, can cause the tool to twist�
• Use clamps to support workpiece whenever
practical. Never hold a small workpiece in one
hand and the tool in the other hand while in use.
Clamping a small workpiece allows you to use your
hand(s) to control the tool� Round material such as
dowel rods, pipes or tubing have a tendency to roll
while being cut, and may cause the bit to bind or jump
toward you�
• Never lay the power tool down until the acces-
sory has come to a complete stop. The spinning ac-
cessory may grab the surface and pull the power tool
out of your control�
• After changing the bits or making any adjust-
ments, 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�
• Do not run the power tool while carrying it at
your side. Accidental contact with the spinning acces-
sory could snag your clothing, pulling the accessory
into your body�
• 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�
• Do not operate the power tool near flammable
materials. Sparks could ignite these materials�
• Do not use accessories that require liquid cool-
ants. 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 ac-
cessory� Pinching or snagging causes rapid stalling of
the rotating accessory which in turn causes the uncon-
trolled 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 in-
correct operating procedures or conditions and can be
avoided by taking proper precautions as given below�
• Maintain a firm grip on the power tool and po-
sition 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, al-
ways 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 a ro-
tary file, high-speed cutter or tungsten carbide cutter
grabs, it may jump from the groove and you could
lose control of the tool�
Safety guidelines during power tool op-
eration
Safety warnings specific for grinding operations
• Use only wheel types that are recommended for
your power tool and only for recommended appli-
cations. 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 break-
age�
• 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 be-
hind the rotating wheel. When the wheel, at the point
of operation, is moving away from your hand, the pos-
sible 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. Nev-
er attempt to remove the cut-off wheel from the
cut while the wheel is in motion otherwise kick-
back may occur. Investigate and take corrective
action to eliminate the cause of wheel pinching or
snagging�
• Do not restart the cutting operation in the work-
piece. Let the wheel reach full speed and carefully
re-enter the cut. The wheel may bind, walk up or kick-
back if the power tool is restarted in the workpiece�
• 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�
• Use extra caution when making a "pocket cut"
into existing walls or other blind areas. The protrud-
ing wheel may cut gas or water pipes, electrical wiring
or objects that can cause kickback�
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