154 8210-00020 R1
4. Appendix
4.1. Bolt Torque
Table 31 gives the correct torque values for various hardware. Tighten all bolts to the torque specified, unless
otherwise noted. Check tightness periodically, using Table 31 as a guide. Replace the hardware with the same
strength bolt, contact AGI if you are unsure.
Table 31. Recommended Bolt Torque
1
Size
Dry or
Lubricated
Threads
per inch
(Course/
Fine)
Area of Bolt
(sq in.)
Recommended Torque (ft-lb)
Grade 2 Grade 5 Grade 8
8.8 S/S
Coarse
Fine
Coarse
Fine
Coarse
Fine
Coarse
Fine
Coarse
Fine
1/4"
Dry
20/28
0.0318 0.0364
5.5 6.3 8 10 12 14 6.3 7.8
Lubricated
6.3 4.7 6.3 7.2 9 10
- -
5/16"
Dry
18/24
0.0524 0.058
11 12 17 19 24 27 11 11.8
Lubricated
8 9 13 14 18 20
- -
3/8"
Dry
16/24
0.0775 0.0878
20 23 30 35 45 50 20 22
Lubricated
15 17 23 25 35 35
- -
7/16"
Dry
14/20
0.1063 0.1187
32 36 50 55 70 80 31 33
Lubricated
24 27 35 40 50 80
- -
1/2"
Dry
13/20
0.1419 0.1599
50 55 75 85 110 120 43 45
Lubricated
35 40 55 65 80 90
- -
9/16"
Dry
12/18
0.182 0.203
70 80 110 120 150 170 57 63
Lubricated
55 60 80 90 110 130
- -
5/8"
Dry
11/18
0.226 0.256
100 110 150 170 210 240 93 104
Lubricated
75 85 110 130 160 180
- -
3/4"
Dry
10/16
0.334 0.373
175 200 260 300 380 420 128 124
Lubricated
130 140 200 220 280 310
- -
7/8"
Dry
9/14
0.462 0.508
170 180 430 470 600 670 194 193
Lubricated
125 140 320 350 180 180
- -
1"
Dry
8/14
0.606 0.679
250 280 640 720 910 1020 287 289
Lubricated
190 210 480 540 680 760
- -
1-1/8"
Dry
7/12
0.763 0.856
350 400 790 890 1290 1440 288 290
Lubricated
270 300 590 670 970 1080
- -
1-1/4"
Dry
7/12
0.989 1.073
500 550 1120 1240 1820 2010 289 291
Lubricated
380 420 840 930 1360 1510
- -
1-1/2"
Dry
6/12
1.405 1.581
870 960 1950 2200 3160 3560
- -
Lubricated
650 730 1460 1640 2370 2670
- -
1. Torque value for bolts and cap screws are identified by their head markings. Established at 75% of yield
strength of bolt given the cross-sectional area.
Note
Torque figures in table are valid for non-greased or non-oiled threads and head unless otherwise
specified. Therefore, do not grease or oil bolts or cap screws unless otherwise specified in this manual.
When using locking elements, increase torque values by 5%.
4. APPENDIX FIELD LOADER S-DRIVE – PORTABLE GRAIN BELT CONVEYOR
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