Spi 21-125-0 Carbide Ball Contact Point Tesa Test Indicators

Product Description

The SPI 21-125-0 is a carbide ball contact point designed for use with Tesa test indicators. It features a 0.015 inch ball diameter and an overall contact point length of 1.437 inches. The carbide tip provides exceptional wear resistance, maintaining measurement accuracy over extended use in precision metrology applications. This contact point is used by machinists, tool and die makers, and quality control technicians who need reliable, repeatable measurements in tight-tolerance inspection work. Its small ball diameter makes it well suited for measuring in confined bores, grooves, and other restricted geometries where larger tips cannot reach.

This contact point is intended for precision measurement applications in machine shops, manufacturing facilities, and quality inspection environments. It is compatible with Tesa test indicators and serves as a direct replacement or spare tip for technicians performing runout checks, surface alignment, bore inspection, and similar indicator-based measurement tasks. The compact dimensions and lightweight construction allow easy installation and removal during routine inspection setups.

Key Features

• Carbide ball tip for superior wear resistance and long service life
• 0.015 inch ball diameter for access in tight or restricted measurement locations
• 1.437 inch contact point length for extended reach applications
• Designed for use with Tesa test indicators
• Lightweight at 0.1 pounds for minimal gauge loading during measurement

Compatibility

Designed for use with Tesa test indicators as specified by the manufacturer.

Installation Notes

Installation is performed by qualified metrology technicians or machinists familiar with test indicator maintenance. Before replacing or swapping contact points, ensure the test indicator is removed from service and the spindle is relaxed to avoid damage to the measuring mechanism. Use the appropriate wrench or contact point tool to thread the contact point into the indicator stem — do not overtighten or apply side force to the tip. Handle carbide-tipped contact points with care, as carbide is brittle and can chip if dropped or struck.