Spi MS170227013 Electronic Outside Micrometer 4 in

Product Description

The SPI MS170227013 is an electronic outside micrometer designed for precision linear measurement in industrial and trade applications. It measures from 3 to 4 inches with a resolution of 0.000050 inches and an accuracy of 0.000200 inches, making it suitable for close-tolerance work in machining, fabrication, and mechanical inspection. The carbide-tipped measuring faces resist wear on hardened or abrasive workpieces. A friction thimble provides consistent measuring force, and the IP54 rating protects the electronics against dust ingress and splash exposure. Licensed metrology technicians, machinists, and quality control inspectors are the primary users.

This micrometer is suited for shop-floor measurement environments where digital readout and environmental protection are required. The rotating spindle and absolute plus incremental measuring modes allow flexible measurement workflows without resetting the origin each power cycle. It ships with an LR44 battery installed and a NIST traceability certification, supporting documented calibration requirements in ISO and AS9100 quality systems. The 2.25-inch throat depth accommodates a range of workpiece profiles.

Key Features

• Resolution of 0.000050 inches for high-precision measurement
• Accuracy rated at 0.000200 inches
• Carbide-tipped measuring faces for extended wear resistance
• IP54 dust and splash protection for shop-floor use
• Supports both absolute and incremental measuring modes
• NIST traceability certification included for calibration documentation
• Friction thimble for repeatable, consistent measuring force

Compatibility

Designed as an OEM-style electronic outside micrometer for standard 3 to 4 inch measurement range applications in machining and inspection environments.

Installation Notes

This instrument is used by machinists and quality control technicians and requires no installation in the traditional sense. Before use, verify calibration status against the included NIST traceability certificate and inspect the measuring faces for wear or contamination. Store in the supplied case when not in use to protect the electronic components and carbide faces. Battery replacement uses a standard LR44 cell; power down the instrument before replacing the battery.