Hirobo HI2521127 5 x 8 x 11.5 Shaft Collar for RC Helicopter Linkages  [HI2521127]

Shaft spacer for rotor linkages

The Hirobo HI2521127 collar marked 5 x 8 x 11.5 is a small-scale RC part intended to act as a spacer in linkage paths and short shaft positions. It provides controlled axial placement where accurate spacing is required.

Install this collar to maintain link alignment, keep axial clearance consistent, and reduce unwanted lateral play at mating points. Because it is a dedicated RC component, check it for wear whenever you inspect the rotor or tail assemblies.

Installation notes: verify the dimension match with the shaft and mating bore before final assembly, check for smooth rotation after fitment, and replace if visible wear or deformation appears. Use gentle fitting techniques to avoid deforming the collar.