Hirobo HI2521099 Collar 2 x 6 x 6 F7.3 x 0.5  [HI2521099]

Shaft collar for RC helicopters

This small-scale collar is an RC helicopter accessory listed under Hirobo general parts, identified by model HI2521099 and the dimension string 2 x 6 x 6 F7.3 x 0.5. It is intended for use on hobby-grade helicopter assemblies where a compact collar is needed to position or retain rotating or sliding components on shafts.

Compatibility: the listing places this item in Hirobo helicopter general parts, so it is suitable for applications within Hirobo rotorcraft parts sets and other small RC helicopter assemblies that accept matching collar dimensions. Verify fit against the shaft diameter and surrounding components before final installation.

Installation notes: as with most collars for RC use, check the orientation and seating on the shaft, ensure alignment with adjacent components, and secure using the intended fastener type for your model. Small collars like this play a tuning role by limiting axial play and maintaining consistent spacing between moving parts, which can improve responsiveness and reduce wear in rotor linkages.