Rotor Clip HO-112ST Zd Internal Snap Retaining Ring

Product Description

The ROTOR CLIP HO-112ST ZD is an internal snap retaining ring designed to seat in a machined groove inside a bore, securing shaft-mounted components axially. Made from 1060/1090 spring steel with a zinc finish, this ring provides reliable retention in moderate-corrosion environments. The bore diameter is 1-1/8 inches, with a free outer diameter of 1.249 inches. Ring thickness is 0.05 inches, and groove width is 0.056 inches at a depth of 0.036 inches. Machinists, maintenance technicians, and assembly professionals install this type of ring in gearboxes, pumps, motors, and other rotating assemblies where a positive axial stop is required without additional fasteners.

This internal retaining ring is suited for residential and light industrial mechanical assemblies where a 1-1/8 inch bore diameter is present. Typical applications include electric motor housings, pump shafts, gearbox assemblies, and similar equipment requiring secure internal component retention. The zinc finish adds corrosion resistance for use in exposed or mildly humid service environments. Installation requires a matched pair of internal snap ring pliers. Minimum order quantity is 10 pieces.

Key Features

• Internal snap ring design seats in a machined groove inside the bore for axial component retention
• 1-1/8 inch bore diameter with 1.249 inch free outer diameter
• Spring steel grade 1060/1090 with Rockwell C 47-52 hardness for consistent spring force
• Zinc finish provides corrosion resistance in mildly humid environments
• Thrust load capacity of 3,400 pounds (groove safety factor) and 8,019 pounds (ring safety factor)
• Groove width tolerance of 0.000 to 0.004 inches ensures precise fitment

Compatibility

Designed as an OEM-style internal retaining ring for mechanical assemblies with a 1-1/8 inch bore diameter machined to accept a standard internal snap ring groove.

Installation Notes

Installation and removal require internal snap ring pliers sized for the bore diameter — do not substitute with screwdrivers or improvised tools, as improper seating can result in ring ejection under load. Ensure the bore groove dimensions match the ring specifications before installation. Always wear eye protection when installing or removing snap rings. Verify all machinery is de-energized and at rest before servicing any assembly that contains this ring.