HIROBO HI2521047 3 x 8 x 9 Shaft Collar for RC Helicopters  [HI2521047]

Precision Collar for Small RC Helicopters

This collar is supplied as an RC-scale accessory for situations where a 3 x 8 x 9 collar dimension is required within helicopter general parts. It is a simple mechanical retention component used to locate and hold rotating shafts or linkages in place on model helicopters serviced with HIROBO general parts.

Installation is straightforward: slide the collar onto the shaft where axial restraint or exact positioning is needed, check concentric alignment with mating components, and secure using the original fastening method. For set-screw style collars confirm the screw seats correctly and avoid over-tightening to reduce risk of shaft damage. Carry out routine inspections after flights to ensure the collar has not moved during operation or after tuning changes.

When used during repairs or tune-ups this collar plays a stabilising role: it maintains axial placement for rotor linkages, swashplate connections, or small shaft-mounted fittings, helping to retain trim and mechanical geometry without changing the rotor system's dynamic characteristics.