ASTEC 40 Series - Wheel Installation Torque Chart

IB-2003
S
eries 40 Trans
fl
ite -
S
tationary
C
onveyor
58
Appendix B: Prevailing Torque Locknut
Bolts must be tightened to the
proper torque as listed in the
table below and on the next
page. These values represent
a torque value at 75% of proof
load. The torque values are
given for both grade 5 and
grade 8 fasteners with unifi ed
Nominal Size
bolt/nut
Standard Hex
Ft.-lb. (N-M)
Prevailing
Torque
Ft.-lb. (N-M)
Standard Hex
Ft.-lb. (N-M)
Prevailing
Torque
Ft.-lb. (N-M)
1/4 - 20 6 (9) 5 (7) 9 (12) 7 (10)
5/16-18 13 (18) 10 (14) 18 (25) 15 (20)
3/8-16 23 (31) 18 (25) 33 (44) 26 (35)
7/16-14 37 (50) 30 (40) 52 (71) 42 (57)
1/2 - 13 56 (76) 45 (61) 80 (108) 64 (86)
9/16 - 12 81 (110) 65 (88) 115 (156) 92 (124)
5/8-11 112 (152) 90 (122) 158 (215) 127 (172)
3/4-10 199 (270) 159 (216) 281 (381) 225 (305)
7/8-9 321 (435) 256 (348) 453 (614) 362 (491)
1 - 8 481 (652) 385 (521) 679 (921) 543 (737)
1-1/8- 7 600 (813) 480 (651) 963 (1305) 770 (1044)
1-1/4 - 7 846 (1147) 677 (918) 1358 (1842) 1087 (1473)
1-3/8 - 6 1109 (1504) 888 (1203) 1781 (2414) 1424 (1931)
1-1/2 - 6 1473 (1997) 1178 (1597) 2363 (3204) 1891 (2564)
2-1/2 - 4 5000 (6779)
coarse threads (UNC) and
unified fine threads (UNF)
along with standard hex nut
and prevailing torque locknut.
Both imperial and metric units
are listed (ft.lbs. and n-m).
Bolt Torque Chart - UNC
Grade 5 Grade 8