Makita BTL063 Manuale di istruzioni - Pagina 7

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Makita BTL063 Manuale di istruzioni

OPERATION

011766
The proper fastening torque may differ depending upon
the kind or size of the bolt, the material of the workpiece
to be fastened, etc. The relation between fastening
torque and fastening time is shown in the figures.
N m
Standard bolt
(kgf cm)
80
(816)
60
(612)
40
(408)
20
(204)
0
1.0
Fastening time (S)
011826
High tensile bolt
N m
(kgf cm)
80
(816)
60
(612)
40
(408)
20
(204)
0
1.0
Fastening time (S)
011824
Hold the tool firmly and place the socket over the bolt or
nut. Turn the tool on and fasten for the proper fastening
time.
NOTE:
When fastening screw M8 or smaller, carefully
•
adjust pressure on the switch trigger so that the
screw is not damaged.
M12
M12
M10
M8
M10
M8
2.0
M10
M10
M8
M8
M6
M6
2.0
Hold the tool pointed straight at the bolt or nut
•
without applying excessive pressure on the tool.
Excessive fastening torque may damage the
•
bolt/nut or socket. Before starting your job, always
perform a test operation to determine the proper
fastening time for your bolt or nut. Especially for
the bolt smaller than M8, perform the above test
operation to prevent the trouble on socket or bolt,
etc.
If the tool is operated continuously until the battery
•
cartridge has discharged, allow the tool to rest for
more than 15 minutes before proceeding with a
fresh battery.
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.
Socket
•
•
3.
Bolt
•
3.0
•
4.
The use of the universal joint or the extension bar
somewhat reduces the fastening force of the
impact wrench. Compensate by fastening for a
longer period of time.
5.
The manner of holding the tool or the material of
driving position to be fastened will affect the
torque.
6.
Operating the tool at low speed will cause a
reduction in the fastening torque.
3.0
Using holster (optional accessory)
CAUTION:
Do not use for tools such as a drill with a bit
•
installed on them.
Turn off a tool and wait until it comes to a
•
complete stop before placing in the holster.
Be sure to close the holster securely so that it
holds the tool firmly.
7
Failure to use the correct size socket will
cause a reduction in the fastening torque.
A worn socket (wear on the hex end or square
end) will cause a reduction in the fastening
torque.
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.