Spi CMS160713022 Electronic Drop Indicator 0.25 in

Product Description

The SPI CMS160713022 is a digital electronic drop indicator designed for high-precision dimensional measurement in machining, inspection, and metrology applications. It delivers a maximum measurement range of 0.25 inches (6.35 mm) with a resolution of 0.0001 inches (0.002 mm) and an accuracy of 0.0003 inches (0.006 mm). The indicator features a center lug flat back mounting configuration and a digital display for direct readout in both inch and metric units. A CR2032 battery powers the unit. NIST traceability certification is included, making it suitable for quality-control environments where documented calibration standards are required. Licensed metrology technicians and precision machinists are the primary installers and users.

This drop indicator is used in precision inspection setups on surface plates, comparator stands, and transfer fixtures in machine shops, manufacturing facilities, and QC labs. The 0.375-inch stem diameter allows compatibility with standard indicator holders and magnetic base arms. The digital readout simplifies reading in both inch and metric modes, reducing transcription error during repetitive inspection cycles. Typical applications include runout checks, flatness verification, bore alignment, and comparative gauging on machined components.

Key Features

• Digital display with inch and metric readout modes
• Maximum measurement range of 0.25 inches (6.35 mm)
• Resolution of 0.0001 inches (0.002 mm) for fine measurement tasks
• Accuracy of 0.0003 inches (0.006 mm)
• Center lug flat back mount for use with standard indicator holders
• NIST traceability certification included for regulated inspection environments
• Powered by a standard CR2032 coin cell battery

Compatibility

Designed for use with standard 0.375-inch stem diameter indicator holders, magnetic bases, and comparator stands common to precision metrology and machine shop inspection setups.

Installation Notes

Mounting is performed by inserting the 0.375-inch stem into a compatible indicator holder or magnetic base arm and securing with the holder clamp. Ensure the measuring tip contacts the workpiece with the specified measuring force of 1.50 N to maintain accuracy. Do not overtighten the stem clamp, as this can damage the stem or alter indicator alignment. Install a fresh CR2032 battery before use if the display is blank or shows a low-battery indicator.