Hirobo HI2521113 RC Helicopter Shaft Collar 3x6-12-10x11.2S  [HI2521113]

Shaft stop designed for rotor tuning

This collar is supplied as a compact shaft retention piece for model helicopter use. It holds small components in axial position on shafts to avoid unwanted lateral movement during tuning sessions or flights.

Installation requires matching the collar to the shaft, seating it correctly, then tightening the retaining screw or clamp method. After securing, rotate the shaft to ensure there is no binding that could affect blade tracking.

In tuning work the collar is a practical positional stop for linkages and spacers, helping to lock settings while adjustments are made. Employ it when fine-tuning pitch links, changing small bearings, or setting end-play on rotor and tail shafts.