Maintenance Section
-130-
Torques for Taperlock Studs
Standard Taperlock Stud Torque
Thread Size
Inch
N•m
1
lb•ft
1/4
8 ± 3
6 ± 2
5/16
17 ± 5
13 ± 4
3/8
35 ± 5
26 ± 4
7/16
45 ± 10
33 ± 7
1/2
65 ± 10
48 ± 7
5/8
110 ± 20
80 ± 15
3/4
170 ± 30
125 ± 22
7/8
260 ± 40
190 ± 30
1
400 ± 60
300 ± 45
1/8
500 ± 700
370 ± 50
1/4
650 ± 80
480 ± 60
3/8
750 ± 90
550 ± 65
1/2
870 ± 100
640 ± 75
1
1 Newton meter (N•m) is approximately the same as 0.1 kg•m.
Torque for Metric Fasteners
NOTICE
Be very careful never to mix metric with U.S.
customary (standard) fasteners. Mismatched or
incorrect fasteners will cause lift truck damage or
malfunction and may even result in personal injury.
Original fasteners removed from the lift truck should
be saved for reassembly whenever possible. If new
fasteners are needed, they must be of the same
size and grade as the ones that are being replaced.
The material strength identification is usually shown
on the bolt head by numbers (8.8, 10.9, etc.). This
chart gives standard torques for bolts and nuts with
Grade 8.8.
NOTE:
Metric hardware must be replaced with
metric hardware. Check parts book.
Standard Torque
Thread Size
Metric
N•m
1
lb•ft
M6
12 ± 4
9 ± 3
M8
25 ± 7
18 ± 5
M10
55 ± 10
41 ± 7
M12
95 ± 15
70 ± 11
M14
150 ± 20
110 ± 15
M16
220 ± 30
160 ± 22
M20
450 ± 70
330 ± 50
M24
775 ± 100
570 ± 75
M30
1600 ± 200
1180 ± 150
M36
2700 ± 400
2000 ± 300
1
1 Newton meter (1 N•m) is approximately the same as 0.1
kg•m.
2
ISO - International Standards organization.
