RC Helicopter S-12 Stop Rings 5 Pc — Hirobo HI2508003  [HI2508003]

Miniature Stop Ring S-12 Overview

This product is a five-piece set of S-12 stop rings suited to general helicopter parts and maintenance tasks. The rings serve as axial retainers within compact rotor and drivetrain assemblies where shaft end movement must be controlled. The S-12 sizing corresponds to common small-shaft grooves used in model helicopter linkages and bearing seats.

Fitting is simple: locate the ring in the shaft groove so it engages evenly and verify full seating to prevent axial slack. When positioned correctly, these rings help preserve head alignment and secure small components during tuning and transport.

Materials and tolerance details vary by manufacturer, so confirm compatibility with the target shaft before final installation. Use this component only in model-scale applications, not in full-size machinery.