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

Compact shaft collar for hobby helicopters

This compact 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 designed for small-scale hobby helicopter assemblies where a short collar is used to locate or retain rotating or sliding components on shafts.

Compatibility note: this item is catalogued within Hirobo helicopter general parts and suits Hirobo rotorcraft parts sets as well as other small RC helicopter builds that accept the same collar dimensions. Always confirm shaft diameter and adjacent clearances before fitting.

Installation tips: position the collar squarely on the shaft, ensure even seating against neighboring parts, and secure with the correct fastener for your model. Small collars limit axial play and preserve spacing between moving parts, which can enhance responsiveness and reduce wear in rotor linkages.