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VARIABLESPEED
See Figure 4.
Your hammer ddll has a variable speed control
selector designed to allow operator control and
adjustment of speed and torque limits. Speed and
torque can be increased or decreased by rotating the
variable speed control selector in the direction of the
arrows shown in figure 4.
VARIABLE SPEED
CONTROL SELECTOR
SPEED(+)
TODECREASE
SPEED(-)
Fig, 4
Note: Hold your hammer drill in normal operating
position and turn the variable speed control selector
clockwise to increase (+) the speed and torque of
your hammer drill. Turn counterclockwise to decrease
(-) the speed and torque of your hammer drill.
If you desire to lock the switch on at a given speed,
depress the switch trigger, push in and hold the lock-
on button, and release the switch trigger. Next, adjust
the variable speed control selector until the desired
speed is reached.
Note: If the variable speed control selector is fully
turned in the counterclockwise direction, (zero setting)
your drill may not run.
If you desire not to use the variable speed control
selector, turn it in the full clockwise direction. This
will allow the speed of your drill to be fully
controlled by the amount of switch trigger
depression,
Avoid running your hammer drillat low speeds for
" _xt-ended periods of time. Running at low speeds
under constant usage may cause your drill to become
overheated. If this occurs, cool your drill by running it
without a load and at full speed.
The following guidelines may be used in determining
correct speed for various applications:
Low speed is ideal when minimum speed and power
is required. For example: starting holes without center
punching, driving screws, mixing paint, and drilling in
ceramics.
Medium speed is suitable for drilling hard metals,
plastics, and laminates.
High speed produces best results when maximum
power is required. For example: drilling in wood; soft
metals such as aluminum, brass, and copper;
concrete; and when using driving accessories.
KEYLESS
CHUCK
See Figure 5.
Your new drill has a keyless chuck. As the name
implies, you can hand tighten or release ddll bit in the
chuck jaws. Grasp and hold the collar of the chuck
/
with one hand. Rotate the chuck body with your other
hand. The arrows shown in figure 5 indicate which
direction to rotate the chuck body in order to GRIP
(tighten) or RELEASE (unlock) the drill bit.
DRILLBIT
RELEASE
(UNLOCK)
CHUCKBODY
GRIP
(TIGHTEN) CHUCKCOLLAR
Fig. 5
,_
WARNING:
Do not hold chuck body with one
hand and use power of the drill to tighten chuck
jaws on drill bit. Chuck body could slip in your
hand or your hand could slip and come in contact
with rotating drill bit. This could cause an
accident resulting in serious personal injury.
9
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