Spi 100-105-02 Test Indicator Holder 3/8 Inch Shank

Product Description

The SPI 100-105-02 is a test indicator holder designed to secure measuring instruments with a 3/8 inch shank diameter. It provides a stable, rigid mounting point that keeps dial test indicators and similar instruments positioned accurately during inspection work. Machinists, tool and die makers, and metrology technicians use this holder to mount indicators on magnetic bases, surface plates, or machine tool setups. Weighing 0.35 pounds, the holder is compact and easy to position without adding significant mass to the setup.

This holder is suited for use in machine shops, quality control environments, and production floor inspection stations where consistent indicator positioning is essential. It is a practical accessory for setups requiring a dedicated mounting solution for 3/8 inch shank instruments such as dial test indicators and lever-type indicators. It works equally well in bench-top inspection and in-machine measurement applications.

Key Features

• Accepts 3/8 inch shank measuring instruments for a secure, repeatable fit
• Lightweight at 0.35 pounds, minimizing added mass in precision setups
• Compatible with standard indicator mounting systems including magnetic bases and surface gauge arms
• Single-piece accessory with a package quantity of one

Compatibility

Designed for use with 3/8 inch shank measuring instruments, including dial test indicators and similar metrology tools requiring that shank size.

Installation Notes

Machinists and metrology technicians typically install this holder as part of an indicator setup on a magnetic base, surface gauge, or fixture arm. Before mounting, ensure the machine or workpiece is stationary and any spindle or moving component is locked out. Tighten the holder clamp securely to prevent indicator drift during measurement. Follow shop calibration procedures after mounting to verify zero and runout before recording measurements.