Hirobo HI2521098 3 x 8 x 2 Blue Shaft Collar for RC Helicopters  [HI2521098]

Compact shaft collar for hobby helicopters

This Hirobo HI2521098 collar is a compact, blue-finished shaft collar stamped 3 x 8 x 2. It is designed to locate and secure shafts or small linkages in hobby helicopter assemblies where precise axial positioning is required.

Sizing notes: the inner bore fits a 3mm shaft, the outer profile is about 8mm and the width measures 2mm, which makes the part suitable for retaining small gears, spacers or control link components on main and tail shafts. The blue finish provides a quick visual check during assembly or maintenance.

Installation and tuning tips: slide the collar onto the intended shaft and position it to prevent axial movement, then secure it according to the collar's fastening method. In rotor head and tail setups, collars act as simple mechanical stops that stabilise trim and reduce endplay without altering bearing alignment.