Rotor Clip E-25ST PA-25 External E Retaining Ring 1/4 in

Product Description

The ROTOR CLIP E-25ST PA-25 is an external E style retaining ring designed for axial retention on shafts with a 0.25 inch diameter. The ring seats into a machined groove with a groove diameter of 0.21 inches and a groove width of 0.029 inches, providing reliable retention without the bulk of a traditional circlip. Manufactured from steel with a phosphate finish, this ring resists corrosion and surface wear under normal service conditions. Ring thickness measures 0.025 inches with a tolerance of -0.002 to 0.002 inches, ensuring consistent fit across applications. Each package contains 25 rings. Licensed HVAC, plumbing, and mechanical technicians use these rings to secure components on small-diameter shafts in motors, pumps, valves, and assemblies.

This retaining ring is suited for light-duty mechanical assemblies where space constraints require a low-profile external retention solution. The E style design allows installation with standard retaining ring pliers without specialized tooling, making it practical for field repairs and bench assembly work. It is commonly found in small motor shafts, pump impeller assemblies, and valve stem applications across residential and commercial mechanical systems. The phosphate finish provides a base layer of corrosion resistance appropriate for indoor mechanical environments.

Key Features

• E style external design for low-profile shaft retention on 0.25 inch shaft diameter
• Steel construction with phosphate finish for surface protection and corrosion resistance
• Groove diameter of 0.21 inches with a tolerance of -0.000 to 0.003 inches for precise seating
• Ring thickness of 0.025 inches with tight tolerance of plus or minus 0.002 inches
• Free outside diameter of 0.527 inches allows easy pre-assembly handling
• Packaged in quantities of 25 per pack with a minimum order quantity of 1

Compatibility

Designed as an OEM-style external E style retaining ring for 0.25 inch diameter shafts requiring a 0.21 inch groove diameter. Verify groove width of 0.029 inches and groove depth of 0.02 inches against the shaft specification before installation.

Installation Notes

Installation and removal should be performed by a qualified mechanic or technician using proper E style or needle-nose retaining ring pliers to avoid ring distortion or eye injury from ring ejection. Shut down and de-energize any motor, pump, or mechanical assembly before servicing internal components that use retaining rings. Inspect the shaft groove for burrs, debris, or wear before seating the new ring. Do not reuse a ring that has been overstressed, distorted, or removed from service more than once.