Spi CMS160809195 Electronic Drop Indicator 0.5 in

Product Description

The SPI CMS160809195 is a digital electronic drop indicator designed for precision dimensional measurement in machining, inspection, and metrology applications. It reads in both inch and metric units, with a maximum measuring range of 0.5 inches (12.50 mm) and an accuracy of 0.0008 inches (0.0200 mm). Resolution is 0.0005 inches (0.0100 mm), making it suitable for tight-tolerance surface and runout checks. The indicator features a center lug flat back mounting style and a 3/8-inch stem diameter for standard magnetic base and fixture compatibility. Power comes from a CR2032 coin cell battery. Machinists, toolmakers, and quality control technicians are the primary users.

This drop indicator fits into inspection and quality control workflows on machine tools, surface plates, and fixture setups. It is used for checking surface flatness, part runout, and concentricity in both job shop and production environments. The dual-unit display supports teams working across inch and metric tolerances on the same floor. The center lug flat back mounting suits a wide range of standard drop indicator holders and magnetic bases found in typical machine shop and inspection room setups.

Key Features

• Digital display with inch and metric unit switching
• Measuring range of 0.5 inches (12.50 mm) starting from 0.0000 inches
• Accuracy of 0.0008 inches (0.0200 mm)
• Resolution of 0.0005 inches (0.0100 mm)
• 3/8-inch stem diameter for compatibility with standard indicator holders and magnetic bases
• Center lug flat back design for secure, repeatable mounting
• CR2032 battery powered for easy field replacement

Compatibility

Designed as an OEM-style drop indicator for use with standard 3/8-inch stem holders, magnetic base arms, and universal drop indicator fixtures common in machine shop and inspection room environments.

Installation Notes

Installation is performed by machinists or metrology technicians familiar with precision indicating instruments. Secure the 3/8-inch stem in a compatible indicator holder or magnetic base arm before taking measurements. Ensure the measuring contact is aligned perpendicular to the reference surface to avoid cosine error. Handle the contact point and stem carefully to prevent damage to internal precision components.