Craftsman 125.21417 Manual Del Usuario página 13

OPERATION FOR DRILL/DRIVER
WARNING:
Make sure to insert the bit
straight into the chuck jaws. Do not insert the
bit into the chuck jaws at an angle and then
tighten, as shown in figure 10. This could
cause the bit to be thrown from the tool,
resulting in possible serious personal injury
or damage to the chuck.
REMOVING BITS
See Figure 9, page ii
1. Lock the trigger switch by placing the
direction-of-rotation selector in the OFF
(center-lock) position.
2. Open the chuck jaws by rotating the
chuck in the direction of the arrow marked
RELEASE.
NOTICE:
Do not use a wrench to tighten or
loosen the chuck jaws.
3. Remove the bit.
DRILLING HOLES OR DRIVING SCREWS
See Figure 11, page iii
1. Rotate the mode selector to the drill
position or one of the 19 driver torque
positions.
2. Check that the direction-of-rotation
selector is at the correct setting (forward
or reverse).
3. Use LO (1) speed for torque applications
and HI (2) speed for fast drilling or driving
applications. Refer to Two-Speed Gear
Box and Adjustable Torque Clutch.
4. When possible, secure the material in a
vise or with clamps to keep it from turning
when drilling or driving.
5. Hold the tool firmly, and place the bit at the
point to be drilled, or where the screw is to
be driven.
6. Depress the trigger switch to start the tool.
7. Move the bit into the workpiece, applying
only enough pressure to keep the bit
cutting. Do not force the tool or apply side
pressure to elongate a hole. Let the tool
do the work.
8. When drilling or driving into hard, smooth
surfaces, use a center punch to mark
the desired location of the hole. This will
prevent the bit from slipping off-center as
the hole is started.
9. If the bit jams when drilling into the
workpiece or if the tool stalls, stop the
tool immediately. Remove the bit from the
workpiece and determine the reason for
jamming.
NOTICE:
This tool is equipped with an
electric brake. When the brake is functioning
properly, sparks may be visible through the
vent slots in the housing. This is normal and
results from the action of the brake.
WOOD DRILLING
For maximum performance, use high-speed
steel or brad-point bits for wood drilling.
1. Select drill mode (
2. Begin drilling at a very low speed to
prevent the bit from slipping off the starting
point.
3. Increase speed as the drill bit bites into the
material.
4. When drilling a "through" hole, place a
block of wood behind the workpiece to
prevent ragged or splintered edges on the
back side of the hole.
METAL DRILLING
For maximum performance, use high speed
steel bits for metal or steel drilling.
1. When drilling metals, use light oil on the
drill bit to keep it from overheating. The oil
will prolong the life of the bit and increase
the drilling action.
2. Select drill mode (
3. Begin drilling at a very low speed to
prevent the bit from slipping off the starting
point.
4. Maintain a speed and a pressure which
allow cutting without overheating the bit.
Applying too much pressure will:
• Overheat the drill
• Wear the bearings
• Bend or burn bits
• Produce off-center or irregularly shaped
holes
5. When drilling large holes in metal, start
with a small bit, then finish with a larger
bit.
13 ― English
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