12 x 15 x 5 Collar for Helicopter General Parts - Hirobo HI2521086  [HI2521086]

Overview of the collar's purpose

This compact RC-scale collar is listed among Hirobo's general helicopter parts and is intended to act as a spacer or locator on rotating shafts and related linkages.

In practice the collar keeps parts at the correct axial position and reduces lateral movement, assisting with alignment of blade grips, hubs and bearings without changing the helicopter's dynamic setup when correctly positioned.

Installation is simple: slide the collar onto the shaft to the required point, seat it against the nearby hub or bearing face, and secure using the existing set screw or retaining method of the assembly. Ensure free rotation and correct alignment after fitting.

Routine inspections should be carried out: check the collar remains seated after flights, inspect for wear or deformation at contact points, and replace the part if excessive play develops to maintain reliable handling.