HIROBO HI2521047 3 x 8 x 9 Collar — RC Helicopter Shaft Component  [HI2521047]

Durable Shaft Collar for Model Helicopters

This collar is offered as a general RC helicopter part when a 3 x 8 x 9 collar size is required. It functions as a straightforward mechanical stop used to locate and retain rotating shafts or linkages on model helicopters that use HIROBO general parts.

Fitting is simple: position the collar to provide the required axial stop, confirm alignment with adjacent parts, and fasten in accordance with the original method. For collars using set-screws check screw engagement and avoid excessive torque to prevent deforming the shaft surface. Regular maintenance inspections will catch any loosening after flights or adjustments.

From a maintenance viewpoint this collar contributes to long-term stability: it keeps axial position for items such as rotor linkages, swashplate joints, and small shaft-mounted hardware, reducing wear from axial movement without affecting overall rotor performance.