Hirobo HI2521095 Precision Collar 3 x 5 x 4.5F for Helicopter Parts  [HI2521095]

Compatibility Notes for 3 x 5 x 4.5F Collar

This collar is an RC-scale accessory intended for use in helicopter general parts and assemblies. The item is recorded as model HI2521095 and the 3 x 5 x 4.5F dimension should be compared to the shaft, pin, or bore to verify correct fit.

Acting as a locating and retention part within rotor or transmission subassemblies, the collar helps maintain axial position for small shafts and linkages. On installation ensure the 3 x 5 x 4.5F size matches the mating component, confirm correct orientation, and make sure the collar seats securely to avoid movement under operational loads.

Inspect for wear, out-of-round condition, or looseness at the interface with shafts or bearings and replace if the collar no longer provides reliable retention. Keeping the mating surfaces clean will help preserve consistent fit and repeatability during routine maintenance.