Value Collection 20121 Chrome Steel Ball Grade 25

Product Description

The VALUE COLLECTION 20121 is a Grade 25 chrome steel ball used in precision bearing, linear motion, and mechanical assembly applications. Measuring 11/16 inches in diameter, it is manufactured to tight dimensional tolerances, with a diameter deviation of no more than 0.00005 inches and a sphericity of 0.000025 inches. The chrome steel construction delivers a Rockwell hardness of 62 to 66 HRC, making it well-suited for high-load and high-cycle environments. Machinists, bearing technicians, and industrial maintenance professionals specify this grade when dimensional accuracy and surface consistency are critical to system performance.

Grade 25 chrome steel balls are commonly used as rolling elements in radial and angular-contact ball bearings, precision valves, pumps, and check valve assemblies. They are appropriate for both light-duty and moderate-load industrial applications where tighter tolerances than standard commercial-grade balls are required. This ball is sold in packages of 25, making it practical for shop stock, repair kits, or small-volume production runs.

Key Features

• Grade 25 precision rating with 0.00005 inch maximum diameter deviation
• Sphericity held to 0.000025 inches for consistent rolling performance
• 62 to 66 HRC hardness for durability in high-load applications
• Chrome steel construction resists wear and deformation under cyclic stress
• 11/16 inch diameter fits standard bearing and valve bore specifications
• Packaged in quantities of 25 for convenient shop or field use

Compatibility

Designed as a precision replacement or stock ball for Grade 25 chrome steel ball applications in bearings, pumps, valves, and mechanical assemblies requiring an 11/16 inch diameter rolling element.

Installation Notes

Installation is typically performed by bearing technicians or mechanical assemblers using clean, lint-free handling practices to avoid surface contamination. Bearings and housings should be fully depressurized or de-energized before disassembly and ball replacement. Avoid direct hand contact with the ball surface during installation, as skin oils can accelerate corrosion; use gloves or clean tooling. Inspect mating races and seats for wear or damage before installing new balls.