RC Helicopter Collar Spacer 5 x 8 x 11.5 Hirobo HI2521127  [HI2521127]

Compact collar for shaft alignment

The Hirobo HI2521127 collar, identified by its 5 x 8 x 11.5 dimensions, is intended as a small spacer within RC helicopter linkage and shaft assemblies. It acts to set axial position and keep mating components correctly spaced.

Use the part to secure alignment between control links and short shafts, limit lateral play where components meet, and protect adjoining parts from premature wear. Treat the collar as a replaceable item and include it in routine maintenance checks.

Installation notes: verify the dimension match with the shaft and mating bore before final assembly, check for smooth rotation after fitment, and replace if visible wear or deformation appears. Prioritise correct sizing to maintain safe control geometry.