Operation - Makita BTD144 Instruction Manual

After inserting the bit, make sure that it is firmly
•
secured. If it comes out, do not use it.
Hook
1
009689
The hook is convenient for temporarily hanging the tool.
This can be installed on either side of the tool.
To install the hook, insert it into a groove in the tool
housing on either side and then secure it with a screw.
To remove, loosen the screw and then take it out.

OPERATION

009690
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
fastening torque and fastening time is shown in the
figures.
Standard bolt
N m
(kgf cm)
120
(1224)
100
(1020)
80
(816)
M12
60
(612)
M10
40
(408)
M8
20
(204)
0 1.0 2.0
Fastening time (S)
009218
1. Groove
2. Hook
3. Screw
2
3
M14
(M14)
(M12)
(M10)
(M8)
3.0
High tensile bolt
N m
(kgf cm)
120
M12
(1224)
100
(1020)
80
(816)
60
(612)
M8
40
(408)
20
(204)
0 1.0
Fastening time (S)
009219
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.
NOTE:
Use the proper bit for the head of the screw/bolt
•
that you wish to use.
When fastening screw M8 or smaller, choose a
•
proper hammer force carefully adjust pressure on
the switch trigger so that the screw is not
damaged.
Hold the tool pointed straight at the screw.
•
If the hammering force is too strong 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.
The fastening torque is affected by a wide variety of
factors 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.
8
(M12)
M10
(M10)
(M8)
2.0 3.0