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

Precision shaft collar for small RC models

This Hirobo HI2521090 collar is an RC-scale shaft collar sized 3 x 8 x 17 intended as a simple retention component for rotating shafts. It is supplied as a single collar unit designed to locate and hold axial position where a compact clamping ring is needed.

Installation is straightforward: position the collar on a shaft that matches the 3 x 8 x 17 sizing and secure it using the appropriate fastener or set method for your build. The collar's role is to control endplay and maintain alignment between mating drivetrain or rotor components without changing other parts of the system.

When tuning or carrying out repairs, use this collar to stabilize shaft position during gear mesh adjustments, rotor head alignment, or when rebuilding small-scale transmission assemblies. Pay close attention to shaft finish and clearances when fitting to prevent binding or excess play.