Makita DTWA070 Manual De Instrucciones página 13

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► Fig.17
The proper fastening torque may differ depending upon
the kind or size of the bolt, the material of the workpiece
to be fastened, etc.
NOTICE:
When fastening small bolts, carefully
adjust pressure on the switch trigger so that the bolt
is not damaged.
NOTICE:
Hold the tool pointed straight at the bolt
or nut.
NOTICE:
Excessive fastening torque may damage
the bolt/nut or impact socket. Before starting your
job, always perform a test operation to determine the
proper fastening time for your bolt or nut.
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.
Impact socket
Failure to use the correct size impact socket
will cause a reduction in the fastening torque.
A worn impact socket (wear on the hex end
or square end) 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 fasten-
ing torque will differ according to the diame-
ter 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.
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 reduc-
tion in the fastening torque.
13 ENGLISH
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