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The fastening torque is affected by a wide variety of
factors including the following. After fastening, always
c h e c k t h e tor q ue w it h a tor q ue w ren c h .
.
When the battery cartridge is discharged almost
completely, voltage will drop and the fastening
tor q ue w ill be re d u c e d .
2.
D ri v er bit or so c ket bit
F ailure to use t h e c orre c t si z e d ri v er bit or so c ket
bit w ill c ause a re d u c tion in t h e f astening tor q ue.
3.
Bolt
Even though the torque coefficient and the
c lass o f bolt are t h e same, t h e proper f asten-
ing tor q ue w ill d i f f er a c c or d ing to t h e d iame-
ter o f bolt.
•
E v en t h oug h t h e d iameters o f bolts are t h e
same, t h e proper f astening tor q ue w ill d i f f er
according to the torque coefficient, the class
o f bolt an d t h e bolt lengt h .
.
The use of the universal joint or the socket adapter
some w h at re d u c es t h e f astening f or c e o f t h e tool.
Compensate by fastening for a longer period of
time.
.
Type of materials to be fastened, the manner of
h ol d ing t h e tool an d t h e tool spee d w ill a f f e c t t h e
tor q ue.
6 .
O perating t h e tool at lo w spee d w ill c ause a re d u c -
tion in t h e f astening tor q ue.
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