Rotor Clip KG-400SJ Internal Spiral Retaining Ring

Product Description

The ROTOR CLIP KG-400SJ is an internal spiral retaining ring designed for a 4-inch bore diameter application. Manufactured from AISI 302 stainless steel, this ring seats into a machined internal groove to axially retain components such as bearings, bushings, and shafts inside a housing bore. The ring measures 0.111 inches thick with a free outside diameter of 4.27 inches and an inside diameter of 3.646 inches. The groove width is 0.12 inches with a corresponding groove depth of 0.12 inches. Its spiral design allows installation without specialized snap-ring pliers in many configurations, making it a practical choice for maintenance and OEM assembly environments.

This retaining ring is suited for industrial, mechanical, and fluid power assemblies where a bore-mounted axial retention solution is required. Typical applications include pump housings, gearboxes, hydraulic cylinders, and rotating equipment where a standard internal snap ring must seat cleanly against a precisely machined groove. The stainless steel construction makes it appropriate for environments with exposure to moisture, mild chemicals, or elevated hygiene requirements such as food processing or medical device assembly. Machinists, millwrights, and mechanical assembly technicians are the primary installers of this component.

Key Features

• Internal spiral design seats into a 4-inch bore groove without requiring external snap-ring tools in many configurations
• AISI 302 stainless steel construction per AMS-5866 for corrosion resistance
• Thrust load capacity of 33,930 pounds (groove safety factor) and 55,800 pounds (ring safety factor)
• Groove width tolerance of 0.000 to 0.005 inches and ring thickness tolerance of -0.003 to 0.003 inches for precise fitment
• Meets ISO 13485:2016 standards, making it suitable for medical device assembly applications
• Groove diameter tolerance of -0.006 to 0.006 inches

Compatibility

Designed as an OEM-style internal spiral retaining ring for 4-inch bore diameter applications requiring a 0.12-inch groove width and 0.12-inch groove depth in a machined housing.

Installation Notes

Installation should be performed by a qualified machinist or mechanical assembly technician familiar with retaining ring specifications. Verify that the bore groove dimensions match the specified groove width and depth before installation to prevent ring displacement under load. Ensure the housing and mating components are clean and free of burrs before seating the ring. Always relieve system pressure, shut down rotating equipment, and follow applicable OSHA lockout/tagout procedures before servicing any assembly containing this ring.