Spi MS150825005 Interchangeable Rod Micrometer 2-8 in

Product Description

The SPI MS150825005 is a mechanical interchangeable rod micrometer designed for precision inside diameter and bore measurements across a 2 to 8 inch range. It uses a set of 6 interchangeable rods, each clearly marked for its specific measurement range, allowing a single tool to cover a wide span without sacrificing accuracy. The micrometer delivers a graduation of 0.001 inch and an accuracy of 0.0004 inch, making it suitable for tight-tolerance inspection work. Each rod measures 0.248 inches in diameter with 1/2 inch of travel per setting. A NIST Traceability Certification is included, confirming the tool meets traceable calibration standards. Machinists, metrologists, and precision measurement technicians are the primary users of this instrument.

This micrometer is suited for shop-floor and metrology lab environments where inside measurements in the 2 to 8 inch range are required. Typical applications include bore gauging of cylinder bores, bearing housings, and large-diameter machined components in manufacturing, maintenance, and quality control settings. The interchangeable rod design makes this a practical choice for technicians who need one versatile instrument to cover multiple measurement ranges rather than carrying several dedicated gauges. The included calibration certificate and carrying case support traceability requirements in ISO and AS9100 quality environments.

Key Features

• Measurement range: 2 to 8 inches via 6 interchangeable rods
• Graduation of 0.001 inch for reliable readability in shop conditions
• Accuracy rated to 0.0004 inch for tight-tolerance inspection
• Each rod is individually marked for its corresponding measurement range
• NIST Traceability Certification and short-form calibration certificate included
• Includes carrying case for storage and transport of all rods and the micrometer head

Compatibility

Designed as a general-purpose interchangeable rod inside micrometer for use in precision measurement applications requiring coverage from 2 to 8 inches.

Installation Notes

This instrument should be handled and stored by trained metrology or inspection personnel familiar with precision measuring tools. Before use, verify the tool is at ambient temperature (typically 68 degrees F) to minimize thermal expansion error. Clean all rod contact surfaces and the micrometer anvil with a lint-free cloth before assembly and measurement. Do not overtighten rods during assembly, as this can introduce measurement error or damage the threads.