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Impact driver operation
When driving wood screws or bolts. set the action mode
changing lever to the mark. The adjusting ring can be
placed at any position.
Screwdriving
Hold the tool firmly and place the point of the driver bit in
the screw head. Apply forward pressure to the tool to the
extent that the bit will not slip off the screw and turn the
tool on to start operation.
Tightening bolts
The proper fastening torque may differ depending upon
the kind or size of the screw/bolt, the material of the
workpiece to be fastened, etc. The relation between fas-
tening torque and fastening time is shown in the figures.
NOTE:
• Use the proper bit for the head of the screw/bolt
that you wish to use.
• When fastening screw M8 or smaller, carefully
adjust pressure on the switch trigger so that the
screw is not damaged.
• Hold the tool pointed straight at the screw.
• If you tighten the screw for a time longer than
shown in the figures, the screw or the point of the
driver bit may be overstressed, stripped, damaged,
etc. Before starting your job, always perform a test
operation to determine the proper fastening time for
your screw.
CAUTION:
• If the tool is operated continuously until the battery
cartridge has discharged, allow the tool to rest for
15 minutes before proceeding with a fresh battery.
The fastening torque is affected by a wide variety of fac-
tors including the following. After fastening, always check
the torque with a torque wrench.
1. When the battery cartridge is discharged almost
completely, voltage will drop and the fastening
torque will be reduced.
2. Driver bit or socket bit
Failure to use the correct size driver bit or socket bit
will cause a reduction in the fastening torque.
3. Bolt
• Even though the torque coefficient and the
class of bolt are the same, the proper fastening
torque will differ according to the diameter of
bolt.
• Even though the diameters of bolts are the
same, the proper fastening torque will differ
according to the torque coefficient, the class of
bolt and the bolt length.
007411
120
100
80
60
40
20
Standard bolt
N m
Fastening torque
Fastening time
S)
Proper fastening torque
(ft lbs)
(87)
(72)
(58)
(43)
(29)
(14)
(
0
1.0 2.0
3.0
M14(9/16")
M12(1/2")
(M14)
M10(3/8")
(M12)
M8(5/16")
(M10)
(M8)
0
(9/16")
(1/2")
(3/8")
(5/16")
007317
High tensile bolt
0
120
100
80
60
40
20
N m
Fastening torque
Fastening time
S)
Proper fastening torque
(ft lbs)
(87)
(72)
(58)
(43)
(29)
(14)
(
M12(1/2")
M10(3/8")
(M12)
M8(5/16")
(M10)
(M8)
(1/2")
(3/8")
(5/16")
0 1.0 2.0 3.0
007319