Hilti GDG 6­A22 Manual Del Operador página 21

cracked wires. If power tool or accessory is dropped, inspect for damage or install an undamaged
accessory. After inspecting and installing an accessory, position yourself and bystanders away
from the plane of the rotating accessory and run the power tool at maximum no-load speed for
one minute. Damaged accessories will normally break apart during this test time.
▶ Wear personal protective equipment. Depending on application, use face shield, safety goggles or
safety glasses. As appropriate, wear dust mask, hearing protectors, gloves and workshop 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.
▶ 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 accessory may fly away and
cause injury beyond immediate area of operation.
▶ Hold power tool by insulated gripping surfaces only, when performing an operation where the
cutting accessory may contact hidden wiring. Cutting accessory contacting a "live" wire may make
exposed metal parts of the power tool "live" and could give the operator an electric shock.
▶ Always hold the tool firmly in your hand(s) during 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 accessory has come to a complete stop. The spinning
accessory may grab the surface and pull the power tool out of your control.
▶ 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.
▶ 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.
▶ 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 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.
▶ 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.
▶ 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.
▶ 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 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.
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