Rotor Clip SH-137ST Zd External Retaining Ring 1-3/8 in

Product Description

The ROTOR CLIP SH-137ST ZD is an external retaining ring engineered for 1-3/8 inch diameter shafts. It seats in a precision-cut external groove to axially retain components on a shaft without threads or other fastening hardware. Made from SAE 1060-1090 carbon steel with a yellow zinc dichromate finish, it delivers corrosion resistance suitable for general industrial and mechanical service environments. Hardness runs 47-52 HRC, giving the ring the spring-back and load capacity expected from a quality snap ring. Groove width is 0.056 inches and ring thickness is 0.050 inches. Licensed machinists, millwrights, and maintenance technicians are the typical installers.

This retaining ring fits applications where a 1-3/8 inch shaft requires positive axial retention of bearings, gears, pulleys, or similar rotating or sliding components. The zinc dichromate finish makes it suitable for light-duty outdoor or moisture-exposed assemblies where bare steel would corrode. It is used across HVAC equipment assemblies, pumps, motors, and general mechanical systems where a groove diameter of 1.291 inches is machined to specification. The 1.800 inch free outside diameter allows ring compression and insertion with standard external snap ring pliers.

Key Features

• Fits 1-3/8 inch shaft diameter with a 1.291 inch groove diameter
• SAE 1060-1090 carbon steel construction, hardness 47-52 HRC
• Yellow zinc dichromate finish for corrosion resistance
• Groove width 0.056 inches with a tolerance of 0.000 to 0.004 inches
• Ring thickness 0.050 inches, tolerance -0.002 to 0.002 inches
• Compliant with SAE 1060-1090, UNS G10600-G10900, and ISO 13485:2015 standards

Compatibility

Designed for use on shafts machined to a 1-3/8 inch nominal diameter with an external groove diameter of 1.291 inches, a groove width of 0.056 inches, and a groove depth of 0.042 inches per standard external retaining ring groove specifications.

Installation Notes

Installation requires standard external snap ring pliers sized for the 1.800 inch free outside diameter. De-energize and lock out all equipment before servicing any shaft assembly. Verify groove dimensions match the ring specifications before installation — an undersized or oversized groove can cause ring ejection under load. Consult applicable machinery safety standards and equipment service manuals before disassembly.