Rotor Clip SE-31ST PA-25 E Style Retaining Ring 25 Pack

Product Description

The ROTOR CLIP SE-31ST PA-25 is an external E style retaining ring designed to seat in a machined shaft groove and retain components axially without the need for threads or snap-ring pliers. Manufactured from spring steel with a phosphate finish, it fits a 5/16 inch shaft diameter and a groove diameter of 0.25 inches. Ring thickness measures 0.025 inches, and the phosphate coating provides baseline corrosion resistance. This ring ships in a package quantity of 25. Licensed mechanics, maintenance technicians, and industrial assembly professionals are the typical installers of this fastener type.

E style retaining rings are widely used in light-duty to medium-duty mechanical assemblies where a low-profile, push-on fastening solution is required. Typical applications include shafts on small motors, gearboxes, pumps, and appliance components where axial retention of pulleys, bearings, or spacers is needed. The E style configuration allows tool-free installation by pushing the ring radially over the shaft groove without requiring a dedicated retaining ring installation tool in most light-load scenarios. This part is sold in packs of 25, making it practical for service stock or small production runs.

Key Features

• E style external design seats radially onto shaft groove for fast installation
• Spring steel construction provides reliable retention force and long service life
• Phosphate finish offers baseline corrosion resistance for general-purpose environments
• 0.025 inch ring thickness with a tolerance of -0.002 to 0.002 inches for consistent fit
• Groove width of 0.029 inches with a tolerance of -0.000 to 0.003 inches
• ISO 13485:2016 standard compliance noted in manufacturer specifications
• Package quantity of 25 suitable for service inventory or batch assembly

Compatibility

Designed as an OEM-style external E style retaining ring for shafts with a 5/16 inch diameter and a machined groove diameter of 0.250 inches, suitable for general mechanical assemblies requiring axial component retention.

Installation Notes

Installation is performed by qualified mechanical technicians or industrial assemblers. Always de-energize and lockout the equipment before disassembling any shaft assembly. Verify the shaft groove dimensions match the ring specifications before installation to ensure proper seating and retention. Do not reuse a retaining ring that has been removed, as the spring steel may be fatigued and retention force compromised.