Hirobo HI2521059 RC Helicopter Shaft Collar 7 x 8 x 10  [HI2521059]

Shaft Retention Collar Overview

This Hirobo part is listed as HI2521059 and uses the 7 x 8 x 10 designation displayed in the name. It is a small shaft collar used to locate and retain rotating components inside helicopter assemblies where correct axial placement supports stable drivetrain operation.

The collar prevents unwanted axial movement and keeps gear interfaces or linkages at their intended positions during tuning and flight. When replacing the collar, verify the 7 x 8 x 10 label against your helicopter's parts diagram or service manual before installation.

Installation note: fit the collar onto the shaft, align to the required position and secure using the fastening method specified for your model; avoid excessive tightening to prevent shaft damage and re-check alignment after a short trial run.