3 x 8 x 17 Hirobo HI2521090 RC Shaft Collar — compact retention ring  [HI2521090]

Compact clamp for RC shafts

The Hirobo HI2521090 collar is an RC-scale shaft collar sized 3 x 8 x 17, made to act as a straightforward retention piece for rotating shafts. It comes as one collar intended to locate and lock axial position where a compact ring is required.

Fitting is simple: slide the collar onto a shaft that corresponds to the 3 x 8 x 17 measurement and fix it with the correct fastener or clamping technique for your model. Its function is to limit axial movement and maintain alignment between connected drivetrain or rotor parts without altering other system components.

For setup or maintenance tasks, employ this collar to stabilise shaft position during gear mesh checks, rotor alignment, or when reassembling small transmissions. Check tolerances and shaft surface condition before tightening to avoid binding or unwanted play.