Rotor Clip SE-31ST Zd E Style Retaining Ring 5/16 in

Product Description

The ROTOR CLIP SE-31ST ZD is an external E style retaining ring designed for 5/16 inch shaft diameters with a groove diameter of 0.25 inches. Manufactured from SAE 1060-1090 steel and finished with a yellow zinc dichromate coating, this ring provides corrosion resistance in demanding service environments. The ring measures 0.025 inches thick, features a 3-prong design for secure axial retention, and carries a hardness rating of 66.5 to 71 HR30N. It is installed by licensed machinists, maintenance technicians, and trade professionals working on rotating shaft assemblies across industrial and mechanical applications.

This retaining ring suits external groove applications on shafts measuring 5/16 inch (0.3125 inches / 7.94 mm) in diameter. It is appropriate for use in HVAC equipment, pump assemblies, motor shafts, and general mechanical assemblies where a compact, externally mounted ring is required. The E style prong configuration allows installation without specialized pliers in some configurations, making it useful in tighter assemblies where standard snap ring access is limited.

Key Features

• E style 3-prong design provides secure axial retention on external shaft grooves
• Yellow zinc dichromate finish delivers corrosion resistance for extended service life
• SAE 1060-1090 steel construction meets UNS G10600-G10900 and ISO 13485:2015 standards
• Hardness of 66.5 to 71 HR30N ensures durability under mechanical load
• Compact ring thickness of 0.025 inches suits tight axial clearance requirements
• Free outside diameter of 0.5 inches with free diameter of 0.243 inches for consistent fitment

Compatibility

Designed as an OEM-style replacement or new-installation retaining ring for external shaft groove applications requiring a 5/16 inch shaft diameter and 0.25 inch groove diameter per SAE 1060-1090 specifications.

Installation Notes

Installation is performed by qualified mechanical technicians or maintenance professionals. Power down and de-energize all equipment before servicing any rotating shaft assembly. Use appropriate E ring installation tools to seat the prongs fully into the shaft groove and verify the ring is fully seated before returning the assembly to service. Do not reuse a ring that has been removed, as deformation during removal compromises retention capacity.