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

Lever collar for RC helicopters

This Hirobo HI2521010 lever collar is a compact RC-scale component intended for use in helicopter general parts assemblies. The product name indicates its nominal size as 3 x 7 x 6, and it is intended to act as a retaining element on small control levers and linkage shafts within model helicopters.

Installers use this type of collar to locate and hold linkage pivots or short lever sections, preventing axial movement and helping preserve trim settings. Because it is a basic mechanical part, placement and orientation follow the host airframe's linkage layout: slide the collar onto the shaft or lever, position it where axial retention is required, and secure it using the model's standard fixing method.

In tuning and setup, a lever collar like this serves to reduce endplay at control joints and to keep linkage spacing consistent, which supports predictable control response. Check existing linkage clearances before adding collars to avoid introducing binding.