S-30 Clutch Bearing with Collar - Hirobo HI0402327  [HI0402327]

S-30 clutch bearing: fit and function

The Hirobo HI0402327 bearing is an RC-scale replacement intended for S-30 clutch assemblies on model helicopters. The integrated collar assists in axial alignment and helps keep the bearing properly located inside the clutch stack.

Use this bearing when refreshing clutch components or where a controlled collar fit is required to uphold clutch geometry. It supplies a stable running surface for the clutch drum or hub, aiding consistent engagement behavior alongside suitably adjusted clutch shoes and springs.

Fitment notes: ensure the bearing is pressed in until the collar contacts the housing, test for smooth rotation and minimal axial play after installation, and replace the bearing if any roughness or excessive wear is found. This item is described as an aftermarket accessory for RC helicopter clutch assemblies.