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

Replacement Collar for RC Helicopters

This collar is presented as an RC-scale accessory intended for use 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 manufactured or serviced with Hirobo general parts.

Installation is straightforward: position the collar on the shaft where axial restraint or precise positioning is needed, verify concentric alignment with the mating parts, and secure per the original equipment fastening method. For set-screw style collars confirm screw seating and avoid over-tightening to prevent shaft damage. Routine checks during maintenance ensure the collar has not shifted after flights or tuning adjustments.

In tuning or repair workflows this collar serves a conservative role: it maintains axial position for components such as rotor linkages, swashplate connections, or small shaft-mounted fittings, helping preserve trim and mechanical geometry without altering dynamic behaviour.