HIROBO HI2521115 3 x 8 x 1.5 Collar for Helicopter Assemblies  [HI2521115]

Spacer function and reliability overview

This HIROBO collar is supplied as an RC-scale spare to act as a compact spacer or bushing within helicopter assemblies. The model HI2521115 and the size notation 3 x 8 x 1.5 identify the collar dimensions and indicate suitability where compact axial spacing or basic shaft alignment is required in general helicopter parts.

Typical role: used between rotating parts or between a shaft and its bearing seat, the collar helps preserve concentricity and limits lateral play during setup and operation. It is suitable for use in linkages, rotor hubs, or small rotary shafts where a consistent thin gap is needed.

Installation notes: place the collar onto the shaft or into the bore as appropriate, ensure free rotation before completing assembly, and check for contact with adjacent components. Use standard hobby tools when adding or removing collars, and inspect fit regularly as part of routine maintenance.