Rotor Clip E-87ST Pa B100 External E Retaining Ring 7/8 in

Product Description

The ROTOR CLIP E-87ST PA B100 is an external E style retaining ring designed to seat in a machined groove on a 7/8 inch (0.875 inch) shaft. It provides axial retention of components on a shaft without requiring threading, staking, or welding. Made from SAE 1060-1090 steel with a phosphate finish, the ring delivers hardness in the 37-43 HRC range for reliable holding force under load. The groove diameter is 0.675 inches and the ring thickness is 0.05 inches. This part is sold in a minimum order quantity of 100 units and is installed by machinists, maintenance technicians, and assembly professionals across industrial and mechanical service applications.

E style external retaining rings are commonly used in light-duty shaft assemblies where a low-profile, three-pronged ring is preferred over a traditional circlip. This ring fits a 7/8 inch shaft with a groove diameter of 0.675 inches and a groove width of 0.056 inches. Typical applications include electric motor shafts, gearboxes, pump assemblies, and HVAC blower motor shafts where axial component retention is required. The phosphate finish provides a baseline level of corrosion resistance suitable for indoor mechanical environments.

Key Features

• External E style ring with three prongs for positive shaft engagement
• Fits 7/8 inch (0.875 inch) shaft diameter with 0.675 inch groove diameter
• SAE 1060-1090 steel construction, hardness 37-43 HRC
• Phosphate finish for corrosion resistance in standard indoor service conditions
• Ring thickness of 0.05 inches with tight tolerance of plus or minus 0.002 inches
• Meets SAE 1060-1090 and UNS G10600-G10900 fastener standards; ISO 13485:2015 quality system

Compatibility

Designed as a standard OEM-style external E retaining ring for 7/8 inch shafts with a 0.675 inch groove diameter and 0.056 inch groove width. Verify groove dimensions against shaft specifications before installation.

Installation Notes

E style retaining rings are installed and removed using retaining ring pliers appropriate for external E style rings — do not use standard snap ring pliers, as prong geometry differs. Confirm groove diameter, groove width, and groove depth match ring specifications before installation. Inspect the groove for burrs or damage that could affect ring seating. Always wear eye protection when installing or removing retaining rings, as the ring can release under spring tension.