Hirobo HI2521090 3 x 8 x 17 RC Shaft Collar  [HI2521090]

RC shaft retaining collar — product details

The Hirobo HI2521090 collar is an RC-scale shaft collar measuring 3 x 8 x 17, designed as a compact retention device for rotating shafts. It is supplied as a single collar unit to locate and retain axial position where a small clamping ring is required.

To fit, slide the collar onto a shaft that matches the 3 x 8 x 17 sizing and secure it with the correct fastener or set method used in your model. The collar helps manage endplay and preserve alignment between mating drivetrain or rotor components without altering other parts.

For tuning or service, use this collar to stabilise shaft position while performing gear mesh fine-tuning, rotor alignment or rebuilding small transmission assemblies. Always check shaft tolerances and surface condition before final tightening to avoid binding or excessive clearance.