Spi 14-818-9 Chrome Steel Gage Ball 8 Mm Grade 25

Product Description

The SPI 14-818-9 is a hardened chrome steel gage ball with an 8 mm diameter, manufactured to Grade 25 accuracy and certified to AFBMA standards. Gage balls are precision-ground spheres used as reference standards and measurement aids in dimensional inspection, fixture tooling, and calibration work. The hardened chrome steel construction provides consistent roundness and surface finish, making these balls suitable for applications where repeatable, traceable measurement is required. Each package contains two gage balls. They are commonly used by machinists, metrologists, and quality technicians in shop-floor and lab environments.

Grade 25 gage balls are appropriate for mid-to-high-precision measurement tasks including bore gauging, radius gauging, and fixture setup in manufacturing and inspection settings. The 8 mm diameter fits a wide range of standard tooling applications. AFBMA certification confirms the balls meet established dimensional and roundness tolerances for precision measurement use.

Key Features

• 8 mm diameter for compatibility with standard gage tooling and fixtures
• Grade 25 accuracy per AFBMA certification for reliable dimensional reference
• Hardened chrome steel construction for wear resistance and surface integrity
• Sold in packages of two balls per package

Compatibility

Designed as a precision reference standard for use with bore gages, radius gages, and fixture tooling requiring an 8 mm hardened steel ball to AFBMA Grade 25 tolerances.

Installation Notes

Gage balls are handled and installed by machinists, metrologists, and quality inspection technicians. Keep balls clean and free of debris before use to avoid measurement errors. Store in a protective case or pouch to prevent surface damage. Do not use gage balls as functional load-bearing components; they are precision measurement references only.