Hirobo HI2521059 Collar 7 x 8 x 10 Shaft collar for RC helicopter components  [HI2521059]

Compact Shaft Collar for RC Helicopters

This Hirobo-branded RC-scale collar is listed as HI2521059 and carries the 7 x 8 x 10 designation shown in the product name. It serves as a small shaft locating and retention component intended for use within helicopter component assemblies, where precise axial positioning of rotating parts matters for reliable drivetrain behaviour.

In practice the collar is used to prevent axial movement of shafts and to keep linkages or gear interfaces at the intended positions during flight and tuning. When replacing or fitting this type of collar, confirm the part's 7 x 8 x 10 labeling against the helicopter's parts diagram or service manual to verify fit before installation.

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