RC Helicopter 3 x 8 x 9 Shaft Collar HIROBO HI2521047  [HI2521047]

Tuning and Positioning Collar

This collar is described as an RC-scale accessory for applications that require a 3 x 8 x 9 collar dimension within helicopter general parts. It is a basic mechanical retention device used to position and hold rotating shafts or linkages on model helicopters compatible with HIROBO general parts.

To install: locate the collar at the required axial point on the shaft, ensure concentric alignment with adjacent components, and secure using the original fastening approach. For set-screw collars check screw engagement and avoid excessive tightening which can damage the shaft. After any trim or tuning changes, recheck the collar position to confirm it remains secure.

In tuning workflows this collar helps preserve mechanical geometry: it fixes axial positions for rotor linkages, swashplate attachments, and small shaft fittings so trim settings remain consistent without changing dynamic response.