Rotor Clip SH-31ST Zd External Retaining Ring 5/16 in

Product Description

The ROTOR CLIP SH-31ST ZD is an external retaining ring designed to secure components on shafts in mechanical assemblies. It seats in a precision-cut groove on the outside of a 5/16-inch shaft, holding bearings, gears, and other retained parts in axial position. The ring is manufactured from SAE 1060-1090 carbon steel and finished with yellow zinc dichromate plating for corrosion resistance. With a ring thickness of 0.025 inches and a hardness range of 69.5 to 73 HRC, this ring delivers reliable holding force in compact drive train, pump, and motor shaft applications. Installation and removal require standard retaining ring pliers.

This external retaining ring is suited for industrial, HVAC, pump, and motor assembly applications where a 5/16-inch shaft diameter is present. It fits a groove diameter of 0.290 inches with a groove width of 0.029 inches and a groove depth of 0.011 inches. Technicians and assemblers working on small-shaft mechanical components will find this ring appropriate for OEM assembly, field replacement, and maintenance overhaul work. The minimum order quantity is 100 pieces, making it practical for production and shop-stock use.

Key Features

• Fits 5/16-inch (0.3125 inches) shaft diameter with a 0.290-inch groove diameter
• SAE 1060-1090 carbon steel construction with hardness of 69.5 to 73 HRC
• Yellow zinc dichromate finish provides corrosion resistance
• Ring thickness of 0.025 inches with tight tolerance of plus or minus 0.002 inches
• Free outside diameter of 0.540 inches for easy pre-installation identification
• Conforms to SAE 1060-1090, UNS G10600-G10900, and ISO 13485:2015 standards

Compatibility

Designed as an OEM-style external retaining ring for shafts measuring 5/16 inches in diameter with a machined groove conforming to the specified 0.290-inch groove diameter and 0.029-inch groove width dimensions.

Installation Notes

Installation and removal should be performed using retaining ring pliers sized for external rings to avoid distorting the ring or damaging the groove. Always relieve load from the shaft assembly and de-energize any connected equipment before servicing retained components. Inspect the shaft groove for burrs or damage before seating the ring, as groove deformation can compromise retention force. Follow applicable machinery safety standards and the equipment manufacturer's service procedures during assembly.