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Tightening torque
Tightening torque
1. Tightening torque for bolts
Tightening torque for bolts is indicated in the text as shown below. Tighten each bolt to the specified
torque.
Part No. of bolt
Part No. of washer
Bolt specification
Tool (Socket)
Tightening torque
If tightening torque for a bolt is not specified in the text, tighten it according to Table 1.
Remarks
1. The thread diameter is the nominal diameter. For example, 16 mm is expressed as M16 and 26
mm is expressed as M20.
The pitch in Table 1 is the distance that the bolt advances every turn in the axial direction (Unit:
mm).
2. The bolt length is dimension c in Fig. 1.
3. The applicable socket size is expressed as 24 mm, 30 mm, etc. Since 24 mm, 30 mm, etc. cor-
respond to dimension b in Fig. 1, an applicable socket can be selected from Table 1, too.
4. Tightening torque is expressed as
is set, expression of
TTTTT-TTTTT
EEEEE-EEEEE
Thread diameter × Bolt length
Applicable socket size
QQQ
QQQ
± RR is applied.
Fig. 1
a : Bolt thread diameter (Nominal diameter)
b : Width across flats of bolt head
c : Bolt length
d : Threaded part of bolt
12
Nm {QQQ kgm}
www
QQQ
± RR. If the target tightening torque
–
or
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