Makita 6905B Instrukcja obsługi - Strona 6
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3.
Socket
*
Failure to use the correct socket
size
will result in torque that
i s
not even.
"Stable torque is not possible with
a
worn socket (wear on the hex end or anvil square
end).
4. Different torque even with the same diameter bolt
*The proper tightening torque differs (even for a bolt of the same diameter) in terms
of the torque coefficient: screw effective diameter, wear angle, lead angle, average
diameter of nut surface and the wear coefficient on the nut surface.
*The type
(class)
bolt makes for a different tightening torque.
*The time for tightening varies in terms of bolt length.
*The torque differs in terms of installation place also.
*The manner of holding the tool will affect the torque.
Even though the torque coefficient and class of bolt are the same, the torque will vary
with bolts of different diameters.
5. Bolts of different diameters
6. Torque measuring method
7. Use of accessories
The tightening torque will even differ depending on the way of measuring
it.
The use of the extension bar somewhat reduces the tightening force of the impact
wrench. Compensate by tightening for a longer time.
6