Sinoboom TB20J Plus - Page 33

TECHNICAL CHARACTERISTICS
TB20J Plus Maintenance Manual 21
© Feb. 2023
Table 3-22 Fastener torque specifications-Metric (Continued)
Nominal
diameter (mm)
Pitch (mm)
Class 8.8 Class 10.9 Class 12.9
1.5
500Nm (369ft-lb) 650Nm (479ft-lb) 770Nm (568ft-lb)
22
2.5
600Nm (443ft-lb) 800Nm (590ft-lb) 980Nm (723ft-lb)
2
650Nm (479ft-lb) 850Nm (627ft-lb) 1050Nm (774ft-lb)
24
3
750Nm (553ft-lb) 1050Nm (774ft-lb) 1250Nm (923ft-lb)
2
800Nm (590ft-lb) 1100Nm (811ft-lb) 1300Nm (959ft-lb)
27 3
1150Nm (848ft-lb) 1500Nm (1106ft-lb) 1800Nm (1327ft-lb)
30 3.5
1500Nm (1106ft-lb) 2000Nm (1475ft-lb) 2400Nm (1770ft-lb)
Unless special torque requirements are listed in this manual or other instructions, torque Unified Thread Standard
bolts (label: UNC) to the values listed in the table below.
Table 3-23 Fastener torque specifications-Unified Thread Standard (UNC)
NNoommiinnaall
ddiiaammeetteerr ((iinn))
OOppppoossiittee nnuutt ssiizzee ((ss))
CCllaassss 55 CCllaassss 88
1/4-20 7/16"
10Nm (7ft-lb) 14Nm (10ft-lb)
5/16-18 1/2"
21Nm (15ft-lb) 29Nm (21ft-lb)
3/8-16 9/16"
37Nm (27ft-lb) 51Nm (38ft-lb)
7/16-14 5/8"
60Nm (44ft-lb) 82Nm (60ft-lb)
1/2-13 3/4"
90Nm (66ft-lb) 130Nm (96ft-lb)
9/16-12 13/16"
130Nm (96ft-lb) 180Nm (133ft-lb)
5/8-11 15/16"
178Nm (131ft-lb) 250Nm (184ft-lb)
3/4-10 1-1/8"
315Nm (232ft-lb) 445Nm (328ft-lb)
7/8-9
- 509Nm (375ft-lb) 715Nm (527ft-lb)
Unless special torque requirements are listed in this manual or other instructions, torque Unified Thread Standard
bolts (label: UNF) to the values listed in the table below.
Table 3-24 Fastener torque specification-Unified Thread Standard bolts (UNF)
NNoommiinnaall
ddiiaammeetteerr ((iinn))
OOppppoossiittee nnuutt ssiizzee ((ss))
CCllaassss 55 CCllaassss 88
1/4-28 7/16"
11.5Nm (8ft-lb) 16Nm (11ft-lb)
5/16-24 1/2"
23Nm (17ft-lb) 32Nm (24ft-lb)
3/8-24 9/16"
41Nm (30ft-lb) 58Nm (43ft-lb)
7/16-20 5/8"
65Nm (48ft-lb) 92Nm (68ft-lb)
1/2-20 3/4"
100Nm (74ft-lb) 145Nm (107ft-lb)
9/16-18 13/16"
145Nm (107ft-lb) 200Nm (148ft-lb)
5/8-18 15/16"
200Nm (148ft-lb) 280Nm (207ft-lb)