RC Helicopter Collar 5 x 7 x 11 Hirobo HI2521088  [HI2521088]

Shaft retention collar for model helicopters

This Hirobo HI2521088 collar is listed as 5 x 7 x 11 and serves as a compact replacement for general helicopter assemblies. It secures axial position on rotating shafts and provides a straightforward retention point in confined spaces.

Installation is simple: slide the collar into place on the shaft and tighten according to the existing fastening approach of your component. Avoid applying excessive clamp torque to prevent shaft damage and check axial play once fitted. The part is useful for maintenance, swaps, and minor setup tuning on RC helicopters.