Precision Shaft Collar 3 x 6-12-10 x 11.2S by Hirobo HI2521113  [HI2521113]

Helicopter shaft positioning collar

This collar is provided as a compact shaft retention part for model helicopter applications. It secures small assemblies on shafts, preventing sideways movement that can alter rotor performance or setup accuracy.

Fitting is straightforward: match the collar to the shaft, position it where required, then tighten the mount. After installation, check that the shaft spins freely to avoid introducing any binding that could disturb balance or tracking.

As a workshop aid the collar serves as a positional stop for spacers and linkage ends, helping to conserve geometry while components are replaced or adjusted. Use it to stabilise parts when you are setting end-play, swapping bearings, or trimming linkages.