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Unlike the rest of our standard shaft collars and couplings that have a single torque rating per screw size, plastic shaft collars are extremely dependent on collar size to determine acceptable torque limits. The following table should be used only as a guideline to tighten plastic collars. Due to the elastic nature of plastics, it is recommended that screw torque be applied in a slow and steady manner as to not induce extra shock into the plastic resulting in premature collar failure.
Stainless Steel
Screw Size |
Collar
Size |
Seating Torque
(in-lb) |
Typical Axial Load
(lbs) |
| #4-40 |
CL-4-P |
2.0 |
100 |
| #6-32 |
CL-6-P |
5.0 |
120 |
| #8-32 |
CL-8-P |
7.5 |
175 |
| #10-32 |
CL-10-P |
10.0 |
170 |
| 1/4-28 |
CL-12-P |
21.0 |
310 |
| 1/4-28 |
CL-16-P |
15.0 |
250 |
| 1/4-28 |
CL-20-P |
25.0 |
305 |
| 1/4-28 |
CL-24-P |
28.0 |
450 |
| 5/16-24 |
CL-28-P |
40.0 |
625 |
| 5/16-24 |
CL-32-P |
50.0 |
600 |
LIABILITY DISCLAIMER
The information chart presented on this page are typical values under certain test conditions and are not a guarantee of average values nor a guarantee of maximum or minimum values under all conditions. Thrust values shown are FAILURE MODE. They are shown solely for the reader to utilize appropriate testing equipment to make his/her own evaluation, and are not intended by Ruland Manufacturing Company, Inc., as warranties, either express or implied, of fitness for a given purpose. A full disclaimer and limited warranty can also be found on this site.
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