Rotor Clip RE-21ST Pa Retaining Ring 7/32 Inch Shaft

Product Description

The ROTOR CLIP RE-21ST PA is an external reinforced E-style retaining ring designed to secure components on a shaft by seating in a precision-machined groove. The ring fits a 7/32 inch (0.2188 inch decimal) shaft diameter and seats in a groove with a 0.188 inch diameter. Manufactured from SAE 1060-1090 carbon steel with a phosphate finish for corrosion resistance, the ring measures 0.025 inches thick and carries a hardness rating of 66.5-71 HR30N. The three-prong reinforced E-style design provides a positive radial grip and resists axial displacement under load. Installed by maintenance technicians, mechanical assemblers, and industrial service professionals working on shafts, spindles, and rotating assemblies.

This retaining ring is suited for light-duty to medium-duty shaft retention applications in industrial equipment, HVAC fan assemblies, pump shafts, motors, and similar rotating machinery. The reinforced E-style geometry gives added resistance to rollout compared to standard E-rings, making it appropriate for applications where vibration or axial loading could dislodge a conventional ring. The phosphate finish provides mild corrosion protection in low-moisture environments. This product is sold in a minimum order quantity of 100 units per the manufacturer requirement.

Key Features

• Reinforced E-style design with 3 prongs for positive shaft retention and rollout resistance
• Fits 7/32 inch (0.2188 inch) shaft diameter with 0.188 inch groove diameter
• SAE 1060-1090 carbon steel construction with 66.5-71 HR30N hardness
• Phosphate finish provides mild corrosion protection
• Ring thickness of 0.025 inches with groove width of 0.029 inches
• Conforms to SAE 1060-1090, UNS G10600-G10900, and ISO 13485:2015 standards

Compatibility

Designed as an OEM-style external retaining ring for 7/32 inch shafts requiring a reinforced E-style groove-seated ring in industrial, HVAC, pump, and motor assembly applications.

Installation Notes

Installation and removal require retaining ring pliers or a flat-blade tool sized for E-style rings — standard snap ring pliers used for circlips are not compatible with E-ring geometry. Shut down and de-energize all rotating equipment before servicing shaft-mounted components. Confirm groove diameter, groove width, and groove depth match ring specifications before installation to prevent improper seating or ring failure. Inspect the groove for burrs or damage prior to assembly.