8
WARNING:
Drill may stall if overloaded causing a sudden twist. Always expect
the stall. Grip the drill firmly with both hands to control the twisting action and avoid
injury.
6. IF DRILL STALLS, it is usually because it is being overloaded or improperly used.
RELEASE TRIGGER IMMEDIATELY, remove drill bit from work, and determine
cause of stalling. DO NOT CLICK TRIGGER ON AND OFF IN AN AT TEMPT TO
START A STALLED DRILL — THIS CAN DAMAGE THE DRILL.
7. To minimize stalling or breaking through the material, reduce pressure on drill and
ease the bit through the last fractional part of the hole.
8. Keep the motor running when pulling the bit back out of a drilled hole. This will
help prevent jamming.
9. With variable speed drills there is no need to center punch the point to be drilled.
Use a slow speed to start the hole and accelerate by squeezing the trigger harder
when the hole is deep enough to drill without the bit skipping out.
DRILLING IN METAL
Start drilling with slow speed and increase to full power while applying firm pressure
on the tool. A smooth even flow of metal chips indicates the proper drilling rate. Use
a cutting lubricant when drilling metals. The exceptions are cast iron and brass which
should be drilled dry.
NOTE:
Large [7.6 mm to 13 mm mm (5/16" to 1/2")] holes in steel can be made
easier if a pilot hole [3.8 mm to 5 mm (5/32" to 3/16")] is drilled first.
DRILLING IN WOOD
Start drilling with slow speed and increase to full power while applying firm pressure
on the tool. Holes in wood can be made with the same twist drills used for metal.
These bits may overheat unless pulled out frequently to clear chips from the flutes.
For larger holes, use spade bits, power auger bits, or hole saws. Work that is apt to
splinter should be backed up with a block of wood.
DRILLING IN MASONRY
When drilling in masonry, use carbide tipped bits rated for percussion drilling and be
certain that the bit is sharp. Use a constant and firm force on the tool to drill most
effectively. A smooth, even flow of dust indicates the proper drilling rate.
Reversing Lever (Fig. 8)
(ONLY FOR D25413-XE, D25414-XE & D25415-XE)
The reversing lever (H) is used to reverse the rotary hammer for backing out fasteners
or jammed bits in drill-only mode.
WARNING:
When reversing to clear jammed bits, be ready for strong reactive
torque.
To reverse the rotary hammer, turn it off and position the reversing lever (H) to the
right.
To position the lever for forward operation, turn the rotary hammer off and push the
reversing lever (H) to the left.
H
FIG. 8
Drilling
(ONLY FOR D25413-XE, D25414-XE & D25415-XE)
1. Always unplug the drill when attaching or changing bits or accessories.
2. Always use sharp drill bits. For WOOD, use twist drill bits, spade bits, power
auger bits, or hole saws. For METAL, use steel twist drill bits or hole saws. For
MASONRY, such as brick, cement, cinder block, etc., use carbide-tipped bits
rated for percussion drilling.
3. Be sure the material to be drilled is anchored or clamped firmly. If drilling thin
material, use a wood “back-up” block to prevent damage to the material.
4. Always apply pressure in a straight line with the bit. Use enough pressure to keep
drill biting, but do not push hard enough to stall the motor or deflect the bit.
5. Hold tool firmly to control the twisting action of the drill.
