Spi 20-311-7 Ball Contact Point Steel Mitutoyo

Product Description

The SPI 20-311-7 is a ball-style contact point designed for use with dial test indicators. It features a steel construction with a 0.118 inch (3.00 mm) ball diameter and an overall contact point length of 1.336 inches. This replacement tip threads into compatible test indicators and provides a precision contact surface for measuring bores, slots, and hard-to-reach surfaces. It is a standard accessory used by machinists, quality control technicians, and metrology professionals in manufacturing and inspection environments.

This contact point is intended for use with Mitutoyo dial test indicators and serves applications where a spherical contact tip is needed to maintain accurate stylus contact on curved or irregular workpiece surfaces. Typical use cases include bore gauging, runout measurement, and surface deviation checks on production floors and in inspection labs. The steel tip provides durability under repeated contact cycling in high-volume measurement tasks.

Key Features

• Ball diameter of 0.118 inches (3.00 mm) for precise point contact
• Overall contact point length of 1.336 inches
• Steel construction for durability and wear resistance
• Designed for use with Mitutoyo test indicators
• Sold individually as a direct replacement contact tip

Compatibility

Designed for use with Mitutoyo test indicators. Verify thread size and stem diameter against your specific indicator model before installation.

Installation Notes

Installation is performed by a machinist or metrology technician. Zero the indicator before seating the new contact point and confirm the tip is fully threaded and secure before use. Avoid overtightening, which can damage the indicator spindle threads. Handle the steel ball tip carefully to prevent nicks or surface damage that could affect measurement accuracy.