Spi 14-816-3 Chrome Steel Gage Ball 6mm Grade 25

Product Description

The SPI 14-816-3 is a chrome steel gage ball with a 6 mm diameter and Grade 25 accuracy, certified to AFBMA standards. Gage balls are precision-ground spheres used as reference standards and measurement aids in dimensional inspection, gauge calibration, and quality control applications. This ball is manufactured from hardened chrome steel, providing the surface hardness and wear resistance needed for repeatable, accurate measurements. Each package contains two balls. Licensed metrologists, quality technicians, and precision machinists are the primary users of this type of tooling.

This gage ball is suited for dimensional verification tasks in manufacturing, metrology labs, and machine shops. Typical applications include checking bore diameters, setting snap gauges, verifying thread ring gauges, and serving as a contact element in fixture setups. The hardened chrome steel construction holds its spherical geometry under repeated use, making it appropriate for high-cycle inspection environments where reference tooling must maintain calibration integrity over time.

Key Features

• Grade 25 accuracy per AFBMA certification ensures tight spherical tolerance for precision measurement
• Hardened chrome steel construction provides surface hardness and long-term wear resistance
• 6 mm diameter suitable for small-bore and fine-pitch inspection applications
• Sold in a package of two balls for backup availability or paired use in V-block setups
• AFBMA certified standard supports traceability requirements in quality management systems

Compatibility

Designed as a general-purpose precision reference ball for use with standard metrology fixtures, bore gauges, and calibration setups that accept a 6 mm spherical contact element.

Installation Notes

Gage balls require no mechanical installation but should be handled with clean, lint-free gloves or wiping cloths to prevent surface contamination that could affect measurement accuracy. Store in a protective case away from abrasive materials and temperature extremes. When using in a fixture or V-block setup, confirm the seating surfaces are clean and free of burrs before placing the ball. Periodic cleaning with a lint-free cloth and light instrument oil is recommended to maintain surface condition.