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Rotation speed
Single/
Continuous
"Delicate work"
Use
Tightening small
diameter screws
(M6 or similar), etc.
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.
CAUTION
Do not touch the hammer case, 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. Tightening torque
Refer to Fig. 13 for the tightening torque of bolts
(according to size), under the conditions shown in
Fig. 14. Please use this example as a general
reference, as tightening torque will vary according
to tightening conditions.
NOTE:
If a long striking time is used, screws will be strongly
tightened. This may cause the screw to break, or may
damage the end of the bit.
If the unit is held at an angle to the screw being
tightened, the head of the screw may be damaged,
or the specified torque may not be transmitted to
the screw. Always keep the unit and the screw being
tightened in a straight line.
16
Examples of tightening mode selector function settings
Low 1
Low 2
500/min
Single
"Light load work"
Affixing plasterboard (select according to
the hardness of the base material) etc.
Medium
1,200/min
Single
4. 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 5/16" (8 mm), there is a danger of the screw
breaking, so please confirm the tightening time and
the tightening torque beforehand.
High
2,000/min
2,600/min
Single
Continuous
"Heavy load work"
Tightening long
screws, coach
screws, bolts, etc.
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