English
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(2) Single/Continuous selector switch
The tightening torque can be adjusted according to
the work by changing the tightening mode using the
single/continuous selector switch and the high/low
selector switch on the side of the impact driver.
When the forward/reverse button is set to reverse,
the high/low mode and single/continuous mode are
set to “High” and “Continuous” respectively,
regardless of the indicators on the switch panel.
The mode switches between single and continuous
mode each time the single/continuous selector switch
is pressed.
In single mode, after the trigger switch has been
pulled to start operation, bolt-tightening stops
automatically after 1 to 4 tightenings.
In continuous mode, when the trigger switch is pulled
to start operation, bolt-tightening continues (without
stopping automatically).
NOTE:
䡬
The appropriate mode differs depending on the screw
and the material being screwed. Drive in a few test
screws and adjust the mode setting accordingly.
䡬
The high/low and single/continuous selector switches
can only be set after the battery has been installed in
the driver and the trigger switch has been pulled
once.
Examples of tightening mode selector function settings
Low 1
Low 2
Medium
High
Rotation speed
500 min
-1
1200 min
-1
2000 min
-1
2600 min
-1
Single/
Continuous
Single
Single
Single
Continuous
Use
“Delicate work”
Tightening small
diameter screws
(M6 or similar), etc.
“Light load work”
Affixing plasterboard (select according to the
hardness of the base material) etc.
“Heavy load work”
Tightening long
screws, coach
screws, bolts, etc.
7. Tightening and loosening screws (WH14DBDL /
WH18DBDL)
Install the bit that matches the screw, line up the bit in
the grooves of the head of the screw, then tighten it.
Push the impact driver just enough to keep the bit
fitting the head of the screw.
CAUTION
Applying the impact driver for too long tightens the
screw too much and can break it.
Tightening a screw with the impact driver at an angle
to that screw can damage the head of the screw and
the proper force will not be transmitted to the screw.
Tighten with this impact driver lined up straight with
the screw.
8. Tightening and loosening bolts
A hex. socket matching the bolt or nut must first be
selected. Then mount the socket on the anvil, and
grip the nut to be tightened with the hex. socket.
Holding the wrench in line with the bolt, press the
power switch to impact the nut for several seconds.
If the nut is only loosely fitted to the bolt, the bolt
may turn with the nut, therefore mistaking proper
tightening. In this case, stop impact on the nut and
hold the bolt head with a wrench before restarting
impact, or manually tighten the bolt and nut to prevent
them slipping.
OPERATIONAL CAUTIONS
1. Resting the unit after continuous work
After use for continuous bolt-tightening work, rest
the unit for 15 minutes or so when replacing the
battery. The temperature of the motor, switch, etc.,
will rise if the work is started again immediately after
battery replacement, eventually resulting in burnout.
NOTE:
Do not touch the metal parts, as it gets very hot
during continuous work.
2. Cautions on use of the speed control switch
This switch has a built-in, electronic circuit which
steplessly varies the rotation speed. Consequently,
when the switch trigger is pulled only slightly (low
speed rotation) and the motor is stopped while
continuously driving in screws, the components of
the electronic circuit parts may overheat and be
damaged.
3. Use a tightening time suitable for the screw
The appropriate torque for a screw differs according
to the material and size of the screw, and the material
being screwed etc., so please use a tightening time
suitable for the screw. In particular, if a long tightening
time is used in the case of screws smaller than M8,
there is a danger of the screw breaking, so please
confirm the tightening time and the tightening torque
beforehand.
05Eng_WH14DBDL_NE
7/16/10, 8:53 AM
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