Maintenance Section
-106-
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 1/8 500 ± 700 370 ± 50
1 1/4 650 ± 80 480 ± 60
1 3/8 750 ± 90 550 ± 65
1 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.
Metric ISO
2
Tread
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 (N•m) is approximately the same as 0.1
kg•m.
2
ISO - International Standards Organization.
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