Hirobo HI2521063 Collar 3 x 7 x 15.5 Compact Shaft Spacer  [HI2521063]

Compact Collar for Rotor Shafts

This Hirobo collar serves as a compact shaft spacer for RC helicopter and related model assemblies. Identified by model HI2521063, the item carries the 3 x 7 x 15.5 dimension set noted in the product title.

It is intended where an axial stop or exact spacing is needed between rotating components or linkages. Always confirm shaft tolerance and clearance to prevent binding or misalignment in gear trains or control linkages.

Fitting is straightforward: seat the collar evenly and inspect adjoining parts for alignment. Small positional shifts can influence endplay and linkage geometry, so adjust incrementally and recheck movements after fitting.