Spi 21-124-3 Ball Contact Point Carbide Tesa Test Indicators

Product Description

The SPI 21-124-3 is a carbide ball contact point designed for use with Tesa test indicators. It features a 0.118 inch ball diameter and a contact point length of 0.497 inches. Carbide construction provides durability and resistance to wear, making it suitable for repeated measurement cycles in precision inspection work. This contact point is installed by metrology technicians and quality control professionals who require consistent, accurate readings from their test indicators during surface, bore, or runout measurements.

This contact point is used in dimensional inspection and quality assurance environments, including manufacturing floors, machine shops, and calibration labs. It threads into compatible Tesa test indicators and is suited for both bench and on-machine measurement applications where a small-diameter ball stylus is required for accessing tight features or contoured surfaces.

Key Features

• Carbide ball construction for extended wear life under repeated contact cycles
• 0.118 inch (3.00 mm) ball diameter for precise contact on small or contoured surfaces
• 0.497 inch contact point length for controlled reach in typical indicator setups
• Designed for compatibility with Tesa test indicators
• Lightweight at 0.1 pounds, minimizing added mass on the indicator spindle

Compatibility

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

Installation Notes

Installation is performed by metrology or QC technicians familiar with precision measuring instruments. Thread the contact point carefully into the indicator spindle by hand to avoid cross-threading, then snug with the appropriate small wrench if required. Do not overtighten, as this can damage the spindle threads or affect indicator calibration. Verify indicator zero and stylus alignment after any contact point replacement.