Spi 21-053-4 Ball Contact Point Carbide Interapid

Product Description

The SPI 21-053-4 is a carbide ball contact point designed for use with Interapid test indicators. It features a 0.015 inch ball diameter and a contact point length of 0.688 inches. Carbide construction provides the hardness and wear resistance needed for repeated contact measurement tasks in precision inspection environments. This replacement contact point is installed by machinists, quality control technicians, and metrology professionals who require accurate stylus geometry for surface and bore measurement work.

This contact point is suited for precision measurement applications where a small ball tip is needed to reach tight tolerances, grooves, or contoured surfaces. It is compatible with Interapid test indicators and is a common replacement item in inspection departments, machine shops, and toolrooms working to close dimensional tolerances.

Key Features

• 0.015 inch carbide ball diameter for small-feature contact measurement
• 0.688 inch contact point length for reach into confined areas
• Carbide tip material resists wear and maintains accurate geometry over repeated use
• Designed as a direct replacement for Interapid test indicator stylus assemblies
• Compact and lightweight at 0.1 pounds

Compatibility

Designed for use with Interapid test indicators as stated by the manufacturer.

Installation Notes

Contact point replacement is performed by metrology or inspection personnel using standard indicator wrench tools. Power down or isolate any CNC or automated equipment before accessing mounted indicators. Avoid overtightening the contact point thread, as carbide tips can be damaged by excessive torque. Handle the ball tip carefully to prevent chipping, which would compromise measurement accuracy.