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4
Mounting Hardware & Torque
Always use new bolts, nuts and compression washers. The bolts should be Grade 5 or 8
(equivalent international designation is 8.8 and 12.9, respectively). Grade 5 bolts are suitable
for a majority of applications. Do not use split lock washers. Use only compression washers.
Table I offers suggested mounting bolt torque values. Always check with the bolt manufacturer
for recommended torque values. Torque the mounting bolts in the proper sequence as shown
in figure 3 so as not to damage casting. After operating vibrator for 15 minutes, disconnect,
lockout/tag out, and torque the mounting bolts a second time. Periodically check the mounting
bolt torque thereafter.
Frame Size
Bolt Size
Dry Torque Grade 5
Dry Torque Grade 8.8
Bolt Size
British (lb-ft)
Metric, (kg-m)
Table I.
Mounting Bolts & Torque Requirements
00, 01
5/16 in-18 NC
16.5
M8
2.3
10, 20
1/2 in-13 NC
58
M12
8
30, 33, 35 ,40, 50
5/8 in-11 NC
137
M16
19
60
3/4 in -10 NC
288
M20
38
70
7/8 in -9 NC
430
M24
71
Figure 3.
Torque Sequence
4 Bolts
1
3
2
4