Spi 14-814-8 Chrome Steel Gage Ball 4mm Grade 25

Product Description

The SPI 14-814-8 is a chrome steel gage ball designed for dimensional inspection and precision measurement applications. Manufactured to Grade 25 accuracy per AFBMA standards, this hardened steel ball delivers the geometric consistency required for use in gaging fixtures, comparators, and calibration setups. The hardened chrome steel construction provides excellent wear resistance and surface hardness, maintaining dimensional integrity under repeated contact. This type of precision ball is commonly handled and qualified by metrology technicians, quality control inspectors, and toolroom machinists working to tight tolerance requirements.

This gage ball is suited for use in inspection environments where tight spherical tolerance and surface finish consistency are critical. Typical applications include go/no-go gaging, bore gaging references, fixture building, and CMM calibration support. The 4 mm diameter makes it appropriate for small-bore and fine-tolerance inspection work. It ships in a package quantity of 2, making it practical for setups requiring a matched pair or a backup reference ball.

Key Features

• Grade 25 accuracy per AFBMA certification for tight spherical tolerance control
• Hardened chrome steel construction for wear resistance and long service life
• 4 mm diameter suitable for small-bore and fine-tolerance inspection applications
• Package quantity of 2 per order unit
• AFBMA certified standard for traceability in precision measurement environments

Compatibility

Designed as an OEM-style precision reference component for use in standard gage fixtures, comparator setups, and inspection tooling that accept 4 mm diameter gage balls.

Installation Notes

Gage balls should be handled with clean, lint-free gloves to prevent surface contamination that could affect measurement accuracy. Store in a clean, dry environment away from corrosive materials. Verify fixture or gage seat dimensions before seating the ball to avoid scoring the surface. Inspection and qualification should be performed by a trained metrology technician or quality control professional.