Hirobo HI2521010 Lever Collar (A) 3 x 7 x 6  [HI2521010]

Helicopter Lever Collar Overview

This Hirobo HI2521010 lever collar is a compact component made for general helicopter parts assemblies. The 3 x 7 x 6 marking identifies the nominal dimensions and the part is used to retain small control levers and linkage shafts in model helicopters.

When fitting, slide the collar onto the shaft or lever and position it where axial retention is required, then secure it using the model's existing fixing method. Installers typically place these collars to locate linkage pivots or short lever sections and to stop unwanted axial movement.

As a setup aid, this type of collar reduces endplay at control joints and helps keep linkage spacing consistent, improving predictable control response. Always inspect linkage clearances after adding collars to ensure no binding is introduced.