Hirobo HI2521013 Collar 3 x 8 x 9.5S Service Replacement  [HI2521013]

Replacement collar for helicopter shafts

Listed under Hirobo helicopter general parts, this collar carries the 3 x 8 x 9.5S nominal designation to match typical shaft and linkage tolerances on small and medium RC helicopters. It functions as a precise spacer to position rotating or sliding components along a shaft.

Use the collar during work on tail or main rotor linkages, shaft joints, or similar collared fixtures where exact axial location is required. Fitting normally involves sliding the collar to the required spot on the shaft and retaining it according to the original assembly method; always consult the kit service notes for the correct retaining hardware and recommended torque.

Being an economical spare, inspect fit and runout before reassembly and keep spare collars available for scheduled maintenance and pre-flight inspections.