Hirobo HI2521055 Collar 3.1 x 6 x 10 for RC Helicopter Maintenance  [HI2521055]

Compact collar for linkage positioning

The collar is an RC-scale part intended for helicopter assemblies where a small locating sleeve is needed. The 3.1 x 6 x 10 mark denotes the nominal sizing to match shaft and linkage tolerances common in small helicopter repairs and builds.

Fitting is simple: slide the collar onto the shaft or post to set the axial location, then secure any adjacent fasteners or set screws as required by the original assembly. It acts as a stop and spacer in stacks, blade grip areas, and other sub-assemblies where consistent clearance is important.

For tuning and routine maintenance, collars preserve repeatable spacing after component changes. Use this collar when you want to stabilise linkage clearance and reduce unwanted play that can affect rotor tracking and control response.