RC Helicopter Shaft Collar 3 x 7 x 17.5 Hirobo HI2521114  [HI2521114]

The Hirobo collar is a replacement part for helicopter general parts assemblies, offering the 3 x 7 x 17.5mm dimensional profile used where accurate axial placement is required. Its role is to space and retain components rather than to transmit power.

Installation is typically: slide the collar onto the shaft to achieve the required axial position, ensure it seats correctly against bearings or hubs, and secure using the model's existing retention hardware. Verify cleanliness of mating surfaces and confirm there is no interference with moving parts before operating.

Use in setup: employ this collar when adjusting blade tracking, tail link geometry, or gearbox engagement to refine alignment and end-play. Make measured adjustments and perform low-speed verification before full use.

Packing

• Item supplied as individual collar, sold per piece.