Description
Adjustable-Torque Thumb Screws
Knurled-head thumb screw that exerts positive, repeatable force. Clockwise, the knob de-clutches and turns freely when you reach the desired torque. Counterclockwise, the knob locks for positive retraction. Adjustable-Torque Thumb Screws are furnished with your choice of swivel foot, and a Knurled Check Nut. Made in USA.
Application Information
Adjustment
To set desired force, first remove the outer cover screw at the side of the knob, to expose the adjustment screw. Next, insert a hex wrench to turn the adjustment screw until desired torque is achieved. Reinstall the outer cover screw when Finished. Torque can be adjusted from 3 to 6 inch-lbs, resulting in a contact force of 10 to 125 lbs, but these values are approximate. Force can vary +/- 30% depending on lubrication and other operating conditions.
Swivel Foot
Choice of three swivel-foot types. The ball end of the body screws into the foot for easy installation and removal. Once the ball threads pass beyond the foot threads, the foot can rotate and pivot freely (20 total angle). Foot threads are left-hand to positively prevent accidental backout during use.
Type A Foot
Material
| Item | Material | Heat Treat | Finish | DFARS | RoHS |
| Screw Body | 1215 Steel | Caburized-Hardened | Black Oxide | Yes | Yes |
| Knob,Check Nut and Steel Foot | 1215 Steel | – | Black Oxide | Yes | Yes |
| Spring | 302 Stainless or Music Wire | – | – | Yes | Yes |
| Delrin foot | White Delrin 500 | – | – | Yes | Yes |
Parts Specification
| A Thread (Inch) | B (Inch) | C (Inch) | D Diameter (Inch) | Torque Adjustment Range (in-lbs) | End-force Adjustment Range (lbs) |
| 1/2-13″ | 3″ | 21/32″ | 1-3/16″ | 3 – 6 in-lbs | 10 – 125 lbs |
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