AEC AG Auger Series Granulator - Manual (Page 35)

6.5” Granulators Chapter 7: Appendix 34 of 35
7-3 Recommended Torque for Screws
When using bolts in tapped holes equal or less than the bolt diameter in thread engagement,
reduce torque by one-half. For flat-head socket head screws, use the column for grade 5
bolts. Torque sheave bushings to grade 5 specifications.
Figure 8: Required torque in foot pounds*
Proof Load
Grade 2 SAE
Grade Grade 5 SAE
Grade Grade 8 SAE
Grade Socket Hd Cap
Screw
Size - KSI
Through 3/4” 55
Above 3/4’ 33 85 120 Through 1/2” 140
Above 1/2” 135
1/4” – 20 5 8 12 14
5/16” – 18 11 17 25 29
3/8” – 16 20 31 44 51
1/2” – 13 49 75 106 124
5/8” – 11 97 150 212 238
3/4” – 10 172 266 375 423
7/8” – 9 166 430 606 682
1” – 8 250 644 909 1023
* Values are for steel only. Based on torque coefficient of .20 and a clamp load that produces
75% of proof load.
Note: When using Loctite #242 (blue), remove any oil with solvent before applying
Loctite. Shake the bottle before using. When not using Loctite, threads should
have a light coating of oil. Do not use these values for “Moly-Lube” or “never-
Seize.”