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Fig. 8
8. IMPACT to ROTATION changeover (Fig. 9)
Shift the change lever between the right and left
positions to switch easily between IMPACT (rotation
and impact) and ROTATION (rotation only),
respectively.
To bore holes in hard materials such as concrete,
stone and tiles, shift the change lever to the right-
hand position (as indicated by the
mark).
The drill bit operates by the combined actions of
impact and rotation.
To bore holes in metal, wood and plastic, shift the
change lever to the left-hand position (as indicated
by the
mark). The drill bit operates by rotational
action only, as in the case of a conventional electric
drill.
CAUTION
⅜ Do not use the Impact Drill in the IMPACT function
if the material can be bored by rotation only.
Such action will not only reduce drill efficiency,
but may also damage the drill tip.
⅜ Operating the Impact Drill with the change lever
in mid-position may result in damage. When
switching, make sure that you shift the change
lever to the correct position.
Fig. 9
9. High-speed/Low-speed changeover:
Prior to changing speed, ensure that the switch is in
the OFF position, and the drill has come to a complete
stop.
To change speed, rotate the gear shift dial as indicated
by the arrow in Fig. 10. The numeral “1” engraved on
the drill body denotes low speed, the numeral “2”
denotes high speed.
If it is hard to turn the gear shift dial, turn the chuck
slightly in either direction and then turn the gear shift
dial again.
Fig. 10
HOW TO USE
1. Switch operation
⅜ When the trigger is depressed, the tool rotates. When
the trigger is released, the tool stops.
⅜ The rotational speed of the drill can be controlled by
varying the amount that the trigger switch is pulled.
Speed is low when the trigger switch is pulled slightly
and increases as the trigger switch is pulled more.
⅜ The desired rotation speed can be pre-selected with
the speed control dial.
Turn the speed control dial clockwise for higher speed
and counterclockwise for lower speed. (Fig. 11)
⅜ Pulling the trigger and pushing the stopper, it keeps
the switched-on condition which is convenient for
continuous running. When switching off, the stopper
can be disconnected by pulling the trigger again.
Fig. 11
2. Drilling
⅜ When drilling, start the drill slowly, and gradually
increasing speed as you drill.
⅜ Always apply pressure in a straight line with the bit.
Use enough pressure to keep drilling, but do not
push hard enough to stall the motor or deflect the bit.
⅜ To minimize stalling or breaking through the material,
reduce pressure on drill and ease the bit through the
last part of the hole.
⅜ If the drill stalls, release the trigger immediately,
remove the bit from the work and start again. Do not
click the trigger on and off in an attempt to start a
stalled drill. This can damage the drill.
⅜ The larger the drill bit diameter, the larger the reactive
force on your arm.
Be careful not to lose control of the drill because of
this reactive force.
To maintain firm control, establish a good foothold,
use side handle, hold the drill tightly with both hands,
and ensure that the drill is vertical to the material
being drilled.
Side handle
Loosen Tighten
Depth gauge
Gear
shift dial
Speed control dial
Low speed
Switch trigger
Stopper
High
speed
Impact Rotation
Change lever
01Eng_DV20VB2_Eng 5/8/09, 19:275