2012Follow Focus forum
Heden M21VE motor bracket thumb screw jamming issue and repair options
14 years old. Gear and prices may have changed since.
What the thread found
- The plastic thumb screw on the Heden motor bracket contains a helicoil insert that can back out and jam up, often due to over-tightening.
- A temporary repair involves removing the small domed cap screw (which has reverse threading) from the top of the plastic thumb screw, loosening the thumb screw, cutting off excess helicoil material, and reinstalling the thumb screw upside down to extend its usable life.
- Heden can supply a replacement helicoil screw as a low-cost alternative to purchasing an entire new bracket.
- The helicoil insert may need replacement again even after being serviced, suggesting this is a recurring design limitation.
Depends on
- The repair is a temporary workaround rather than a permanent fix.
- This issue appears specific to the Heden M21VE bracket used in the Cvolution kit.
- The helicoil may jam up again after repair, making it a recurring maintenance issue.
- Replacement helicoil screws from the manufacturer are described as inexpensive but the broader design issue remains unresolved.