Thomson Industries PR250 Steel Internal Retaining Ring

Product Description

The THOMSON INDUSTRIES PR250 is a steel internal push-in retaining ring designed to secure components within a bore or housing. It seats into an internal groove and holds a shaft, bearing, or assembly in axial position without requiring threaded fasteners or welded stops. This ring is used in conjunction with Thomson SUPER-4 linear bearing systems, where precise axial retention is critical to smooth, consistent linear motion. Maintenance technicians and mechanical assemblers working on linear motion systems are the primary installers. At 0.5 inch inside diameter, this ring fits small-bore linear bearing housings and is a low-profile, high-reliability retention solution.

The PR250 is specified for use with Thomson SUPER-4 linear bearings. It is suited to light-duty and precision linear motion assemblies found in industrial automation, actuator systems, and machine tooling. The push-in style simplifies installation by eliminating the need for snap-ring pliers in many applications, making it practical for production-line assembly as well as field service replacement. This ring is sold individually per package, with a minimum order quantity of 5 units.

Key Features

• Internal push-in style seats directly into bore groove without external tooling in most applications
• Steel construction provides durable axial retention in light to moderate load environments
• 0.5 inch inside diameter sized for small-bore SUPER-4 linear bearing housings
• Low profile design does not add significant assembly length
• Direct replacement retention hardware for Thomson SUPER-4 linear bearing systems

Compatibility

Designed for use with Thomson SUPER-4 linear bearing systems requiring a 0.5 inch inside diameter internal push-in retaining ring.

Installation Notes

Installation is typically performed by mechanical technicians or automation maintenance personnel. Before servicing any linear motion assembly, de-energize all actuators and relieve any stored mechanical load or spring tension in the system. Ensure the bore groove is clean and free of debris before seating the ring. Verify the ring is fully seated in the groove before reassembling the bearing or housing to prevent axial play or component displacement during operation.