3 x 6 x 5S Hirobo HI2521064 Shaft Stop Collar for RC Helicopter Shafts  [HI2521064]

Helicopter shaft stop collar

This Hirobo HI2521064 collar carries the 3 x 6 x 5S designation and is made for use within RC helicopter component groups. It serves as a compact spacer or stop on rotating shafts, helping to manage endplay and hold components in the correct axial position within tail or main rotor systems.

During assembly slide the collar to the required axial point, check mesh and bearing alignment with neighbouring parts, and fasten it according to your model's established method. Collars are a straightforward tuning aid that help stabilise shaft position and maintain reliable control link geometry.