Page 605 - SKF-bearing-housings

Design considerations

Attachment bolt recommendations
In typical applications, 8.8 class hexagon head
bolts, in accordance with ISO 4014, can be
used together with washers.
For SBPN housings, M 24 or 1 UNC attach-
ment bolts with a recommended tightening
torque of 665 Nm are suitable. For SDM hous-
ings, refer to table 4.

Table 4
Torque values for cap bolts and attachment bolts for SDM housings
Housing Cap bolts Attachment bolts
Size Designation to ISO 262 Tightening torque Size Tightening torque
grade 8.8
– – Nm – Nm
3068 M 24 or 1 UNC 350 M 24 or 1 UNC 665
3168 M 24 or 1 UNC 350 M 24 or 1 UNC 665
3076 M 24 or 1 UNC 350 M 24 or 1 UNC 665
3084 M 30 or 1.1/4 UNC 400 M 24 or 1 UNC 665
3184 M 30 or 1.1/4 UNC 400 M 24 or 1 UNC 665
3092 M 30 or 1.1/4 UNC 400 M 24 or 1 UNC 665
30/530 M 30 or 1.1/4 UNC 400 M 30 or 1.1/4 UNC 1 310
31/530 M 30 or 1.1/4 UNC 400 M 30 or 1.1/4 UNC 1 310 13
30/600 M 30 or 1.1/4 UNC 400 M 30 or 1.1/4 UNC 1 310
31/630 M 36 or 1.1/2 UNC 600 M 30 or 1.1/4 UNC 1 310
30/670 M 36 or 1.1/2 UNC 600 M 30 or 1.1/4 UNC 1 310

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