Craftsman 315.115800 Manual Del Operador página 11

ADJUSTING THE DEPTH STOP ROD
See Figure 13, page iii.
 Lock the switch trigger by placing the rotation selector
in the center position.
 Loosen the auxiliary handle assembly by turning the
knob counterclockwise.
 Adjust the depth stop rod so that the drill bit extends
beyond the end of the rod to the required drilling depth.
 Tighten the auxiliary handle assembly by turning the
knob clockwise.
SELECTING A DRILLING MODE
See Figure 14, page iii.
To adjust for type of drilling, slide the mode selector on
the side of the motor housing to hammer mode, screw
mode, or drilling mode.
Select screw mode for driving screws. Screw mode
operates with user adjusted torque. (See Adjustable
Torque Clutch.)
Drill mode is for full torque operations only and bypasses
the clutch setting. Select drill mode when drilling with
twist drills, hole saws, etc., in soft materials, or when the
application calls for full torque of the drill.
Select hammer mode for masonry, brick, tile, and
concrete. For maximum performance, use carbide-tipped
impact masonry bits.
To use the hammer mode:
 Rotate the mode selector to the hammer mode.
 Apply light pressure and medium speed for best results
in brick.
 Apply additional pressure and high speed for hard
materials such as concrete.
 When drilling holes in tile, practice on a scrap piece to
determine the best speed and pressure.
NOTE: The hammer drill has not been designed for
reverse hammering.
DRILLING
See Figures 15 - 16, page iii.
Levels are located on the top and end of the motor
housing to help keep the drill bit level during use.
 Check the direction of rotation selector for the correct
setting (forward or reverse).
 Secure the material to be drilled in a vise or with
clamps to keep it from turning as the drill bit rotates.
 Hold the drill firmly and place the bit at the point to be
drilled.
 Depress the switch trigger to start the drill.
 Move the drill bit into the workpiece, applying only
enough pressure to keep the bit cutting. Do not force the drill or apply side pressure to elongate a hole. Let
the tool do the work.
OPERATION
WARNING:
breakthrough. When these situations occur, drill has
a tendency to grab and kick opposite to the direction
of rotation and could cause loss of control when
breaking through material. If not prepared, this loss
of control can result in possible serious injury.
 When drilling hard, smooth surfaces, use a center
punch to mark the desired hole location. This will pre-
vent the drill bit from slipping off-center as the hole is
started.
 When drilling metals, use a 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.
 If the bit jams in the workpiece or if the drill stalls,
stop the tool immediately. Remove the bit from the
workpiece and determine the reason for jamming.
NOTE: This drill has an electric brake. When the switch
trigger is released, the chuck stops turning. When the
brake is functioning properly, sparks will be visible through
the vent slots on the housing. This is normal and is the
action of the brake.
WOOD DRILLING
For maximum performance, use high speed steel bits for
wood drilling.
 Begin drilling at a very low speed to prevent the bit
from slipping off the starting point. Increase the speed
as the drill bit bites into the material.
 When drilling through holes, 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.
 Begin drilling at a very low speed to prevent the bit
from slipping off the starting point.
 Maintain a speed and pressure which allows cutting
without overheating the bit. Applying too much
pressure will:
• Overheat the drill;
• Wear the bearings;
• Bend or burn bits; and
Fig. 15
• Produce off-center or irregular-shaped holes.
 When drilling large holes in metal, start with a small bit,
then finish with a larger bit. Also, lubricate the bit with
oil to improve drilling action and increase bit life.
11 – English
Be prepared for binding at bit