Value Collection 20155 Chrome Steel Ball Grade 25 13mm

Product Description

The VALUE COLLECTION 20155 is a Grade 25 chrome steel precision ball designed for applications requiring tight dimensional tolerances and high surface hardness. With an overall diameter of 13.0 mm, a diameter deviation of 0.00005 inches, and a sphericity of 0.000025 inches, this ball meets the exacting standards used in precision bearing assemblies, gauging equipment, and industrial motion components. Hardness ranges from 62 to 66 HRC, indicating a fully hardened chrome steel construction suited for load-bearing and wear-resistant service. Sold in a package quantity of 5.

Grade 25 chrome steel balls are commonly used in precision ball bearings, check valves, linear motion systems, and instrumentation assemblies across industrial, hydraulic, and mechanical applications. The metric 13.0 mm diameter fits a range of standard metric bearing housings and valve seats. These balls are appropriate for use by maintenance technicians, machine builders, bearing specialists, and precision equipment service professionals working in manufacturing, hydraulics, and industrial automation environments.

Key Features

• Grade 25 precision rating with 0.00005 inch diameter deviation
• Sphericity tolerance of 0.000025 inches for consistent roundness
• 62 to 66 HRC hardness for high wear resistance and load capacity
• Chrome steel construction suitable for standard bearing and valve applications
• Metric sizing at 13.0 mm overall diameter
• Packaged in quantities of 5 to support small-quantity service and replacement needs

Compatibility

Designed as an OEM-style replacement or service component for precision bearing assemblies, check valves, and industrial machinery requiring Grade 25 chrome steel balls with a 13.0 mm metric diameter.

Installation Notes

Installation is typically performed by bearing technicians or mechanical assemblers familiar with precision component handling. Clean mating surfaces and housings before installation to prevent contamination that could affect tolerance fit or surface finish. Avoid impact installation methods that could alter sphericity or damage the hardened surface. Consult equipment manufacturer specifications to confirm dimensional and grade requirements before replacing existing balls.