HIROBO HI2521115 Collar 3 x 8 x 1.5 collar for RC helicopter general parts  [HI2521115]

Collar for RC helicopter assemblies

This HIROBO collar is an RC-scale spare intended for use as a small spacer or bushing inside helicopter assemblies. The model designation HI2521115 and the size notation 3 x 8 x 1.5 identify the collar's basic dimensions, making it suitable where compact axial spacing or shaft alignment is required within general helicopter parts.

Typical role: the collar functions as a thin spacer between rotating components or between a shaft and a bearing surface, helping maintain concentric alignment and reducing lateral play during tuning and setup. It is applied where a slim, repeatable gap is needed in linkages, rotor hubs, or small rotary shafts.

Installation notes: fit the collar onto the shaft or into the bore as required, confirm free rotation before final assembly, and check for any interference with adjacent components. Use standard hobby tools to remove or add collars during setup; final clearance should be confirmed while the rotor is stationary.