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.
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