Hammer/Drill Selector - DeWalt DW505 Instruction Manual

OFF, from a locked ON condition, squeeze and release the trigger
once. Before using the tool (each time), be sure that the locking button
release mechanism is working freely.
Do not lock the switch ON when drilling by hand so that you can
instantly release the trigger switch if the bit binds in the hole. The
locking button is for use only when the hammerdrill is mounted in a
drill press stand or other wise held stationary. Be sure to release the
locking mechanism before disconnecting the plug from the power
supply. Failure to do so will cause the hammerdrill to start immediately
the next time it is plugged in. Damage or injury could result.
The variable speed trigger switch permits speed control. The farther
the trigger switch is depressed, the higher the speed of the hammerdrill.
NOTE: Use lower speeds for starting holes without a centerpunch,
drilling in metal, plastics or ceramics, or driving screws. Higher speeds
are better for drilling in wood and composition board and for using
abrasive and polishing accessories.
The reversing lever is used to reverse the hammerdrill for backing
out screws or jammed bits. It is located above the trigger, shown in
Figure 2. To reverse the hammerdrill, turn it OFF and push the
reversing lever to the left (when viewed from the chuck end). To
position the lever for forward operation, turn the hammerdrill OFF
and push the lever to the right.
High/Low Speed Operation
The two speed gear drive in the dual range hammer drill permits
effective operation over an extended range of applications with greater
selection of accessories.
For LOW SPEED operation, the shift knob (see Figure 3) located on
the underside of the hammerdrill should be rotated so the "low speed"
graphic is toward the front of the tool.
For HIGH SPEED operation, should be rotated so the "high speed"
graphic is toward the front of the tool.
FIGURE 3 FRONT OF TOOL
SHOFT
KNOB
The gear train has been designed for shifting only when the unit is off.
It may be necessary however, to rotate the chuck slightly by hand to
align the gears while turning the shift knob. DO NOT ATTEMPT TO
CHANGE SPEEDS by turning the shift knob when the tool is running.
Doing so will damage the gear train.

Hammer/Drill Selector

To switch the tool from the drilling mode to the hammering mode (or
vice-versa) rotate the dial on the applicable symbol shown in Figure 4.
For straight drilling, align the drill bit symbol toward the chuck. For
hammering, align the hammer symbol with the chuck, as shown in the
figure.
NOTE: The selector must be in either drill, or hammer/drill mode at all
times. There are no operable positions between the two.
Chuck
To insert bit, open chuck jaws by turning collar with fingers and insert
shank of bit about 3/4" (19 mm) into chuck. Tighten chuck collar by
hand. Place chuck key in each of the three holes and tighten in
clockwise direction. It's important to tighten chuck with all three holes.
To release bit , turn chuck key counterclockwise in just one hole, then
loosen the chuck by hand.
4
LOW SPEED
SETTING
HIGH SPEED
SETTING