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10. For drilling into brick (DV18DEX)
Excessive pressing force never increases drilling
speed. It will not only damage the drill tip or reduce
working effi ciency, but could also shorten the service
life of drill bit. Operate the hammer drill within 10-20 kg
pressing force while drilling into brick.
CAUTION
● The motor rotation may be locked to cease while
the unit is used as drill. While operating the
hammer drill, take care not to lock the motor.
● If the motor is locked, immediately turn the power
off . If the motor is locked for a while, the motor or
battery may be burnt.
● Too long hammering may cause the screw
broken due to excessive tightening.
Work
Machine screw
Screw
tightening
Wood screw
Brick
(DV18DEX)
Wood
Drilling
Metal
16
Table 7
Cap Position
For 1/4 in. (6 mm) or smaller
1–22
diameter screws.
For #20 (10 mm) or smaller
1–
nominal diameter screws.
For 1/2 in. (13 mm) or smaller
diameters.
For 2 in. (52 mm) or smaller
diam-eters.
11. How to select rotational speed
CAUTION
● The selection examples shown in Table 7 should
be considered as general standard. As diff erent
types of tightening screws and diff erent materials
to be tightened are used in actual works proper
adjustments are naturally necessary.
● When using the driver drill/hammer drill with a
machine screw at "2" (high speed), a screw may
damage or a bit may loose due to the tightning
torque is too strong. Use the driver drill/hammer
drill at "1" (low speed) when using a machine
screw.
NOTE
The use of the battery in a cold condition (below
0 degree Centigrade) can sometimes result in the
weakened tightening torque and reduced amount of
work. This, however, is a temporary phenomenon,
and returns to normal when the battery warms up.
Rotating speed selection (Position of the shift knob
"1" (Low speed)
———
"2" (High speed)
For 1/4 in. (6 mm) or smaller
diameter screws.
For #16 (6 mm) or smaller
nominal diameter screws.
For 13/32 in. (10 mm) or smaller
diameters.
For 1 in. (24 mm) or smaller
diameters.
For drilling with a metal working
drill bit.
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