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INTRODUCTION
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SECTION 1
Page5
STANDARD TORQUES
(For specialtorque data, refer to "SPECIAL TORQUES" in Section 9.)
This chart provides tightening torque for general-purposeapplications using original equipment standard hardware
as listed in the Parts Catalog for the machine involved. DO NOT SUBSTITUTE. Original equipment standard
hardware is defined as IH Type B, coarse thread bolts and nuts and thru hardened flat washers, all phosphate
coated and assembledwithout supplemental lubrication.
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The torques shown below also apply to the following:
1.
Phosphatecoated bolts usedin tapped holes in steel or gray iron.
2.
Phosphatecoated bolts usedwith prevailing torque nuts (nuts with distorted threads
or plastic inserts).
3.
Phosphatecoated bolts usedwith copper plated weld nuts.
4.
Plain finish (uncoated) bolts and nuts that are clean, rust free and oiled and usedin
the samemanner asdescribedabove.
Markings on bolt heads on nuts indicated material grade ONLY and are NOT to be used to determine required
torque.
STANDARD TORQUE! 10%
NOMINAL
THREAD
FOOT
NEWTON
DIAMETER
LBS.
METERS
1/4
7
10
5/16
14
19
3/8
24
32
7/16
38
51
1/2
60
80
9/16
80
110
5/8
115
155
3/4
200
270
7/8
320
440
1
480
650
1-1/8
590
800
1-1/4
830
1100
1-3/8
1100
1500
1-1/2
1400
1900
1-3/4
2300
3100
2
3400
4600
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