DeWalt DW974 Manual De Instrucciones página 10

385360/DW974 etc 5/2/02 11:25 AM
selector to the "Drill" position as described under "Operation as a
Drill." (You may shift the Driver/Drill selector regardless of the
adjustment collar setting.)
Since the adjustment collar and the Driver/Drill selector are distinctly
different controls, you can switch between drilling and screwdriving
without touching the adjustment collar. Once the collar is set, it
remains unchanged until you decide to change it.
Keyless Chuck
Your tool features a keyless chuck for greater convenience. To insert
a drill bit or other accessory, follow the steps listed below.
1. Lock the trigger switch in the off position as described on page 6.
2. Grasp the rear half of the chuck with one hand and use your other
hand to rotate the front half counterclockwise, as shown in FIG 6.
Rotate far enough so that the chuck opens sufficiently to accept
the desired accessory.
3. Insert the bit or other accessory about 3/4" into the chuck and
tighten securely by holding the rear half of the chuck and rotating
the front portion in the clockwise direction.
To release the accessory, repeat step 2 listed above.
WARNING: Do not attempt to tighten drill bits (or any other
accessory) by gripping the front part of the chuck and turning the tool
on. Damage to the chuck and personal injury may result. Always lock
off trigger switch when changing accessories.
Be sure to tighten chuck with two hands on both the rear sleeve and
the forward sleeve for maximum tightness.
Chuck Removal
Always wear eye protection.
Turn the adjustment collar to the "drill" position and low speed gear
shifter position 1. Tighten the chuck around the shorter end of a hex
key (not supplied) of 1/4" or greater size. Using a wooden mallet or
similar object, strike the longer end in the clockwise direction, as
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Page 7
shown in FIG. 7. This will loosen the screw inside the chuck.
Open chuck jaws fully, insert screwdriver (or Torx tool if required) into
front of chuck between jaws to engage screw head. Remove screw
by turning clockwise (left-hand-thread). Place hex key in chuck and
tighten, as shown in FIG. 8. Using a wooden mallet or similar object,
strike key sharply in the counterclockwise direction. This will loosen
the chuck so that it can be unscrewed by hand.
Chuck Installation
Screw the chuck on by hand as far as it will go and insert screw (LH
thread). Tighten screw securely. Tighten the chuck around the shorter
end of a 1/4" or larger hex key (not supplied) strike the longer end in the
clockwise direction with a wooden mallet, as shown in FIG. 7. Tighten the
screw once again by turning in a counterclockwise direction.
Operation as a Drill
Turn the collar to the drill bit symbol. Install and tighten the desired
drill bit in the chuck. Select the desired speed/torque range using
the dual range gear shifter to match the speed and torque to the
planned operation. Follow these instructions for best results when drilling.
DRILLING
1. Use sharp drill bits only. For WOOD, use twist drill bits, spade bits,
7
FIG. 7
power auger bits, or hole saws. For METAL, use high speed steel twist
drill bits or hole saws. For MASONRY, such as brick, cement, cinder
FIG. 8