Hirobo HI2521096 collar, shaft collar part for RC helicopter general parts  [HI2521096]

Shaft collar for Hirobo helicopters

This Hirobo HI2521096 collar is an RC-scale shaft collar intended for use within Hirobo helicopter general parts. It is a small mechanical accessory that serves to hold components on a shaft and to maintain axial position in rotor-related assemblies. The article focuses on practical compatibility notes, installation approach, and the role this collar plays during setup and tuning.

Compatibility: the part is listed under Hirobo helicopter general parts, so it is suitable wherever a matching collar dimension is required within Hirobo rotor and transmission subsystems. Confirm physical fit against the shaft and surrounding components before installation to ensure proper clearance.

Installation and service role: install the collar by positioning it at the desired axial location on the shaft and securing it so the component retained cannot move under operational loads. In practice the collar is used during setup to lock gear position, stabilise rotor spacing, and support repeatable alignment when adjusting rotor tracking or drivetrain tolerances. Inspect the collar for burrs or deformation during routine maintenance and replace if wear affects fit or clamping.