Spi MS160712028 Inside Tubular Micrometer 2-12 in

Product Description

The SPI MS160712028 is a mechanical inside tubular micrometer designed for precision internal diameter measurement across a range of 2 to 12 inches. It reads in decimal inches with a graduation of 0.001 inches and an accuracy of 0.0001 inches, making it suitable for demanding dimensional inspection work in machine shops, maintenance facilities, and manufacturing environments. The friction thimble provides consistent measuring pressure to reduce operator-induced error. Measuring faces are solid carbide for wear resistance and long service life. A standard for micrometer head calibration is included, and the unit ships pre-calibrated.

This micrometer is used for measuring the internal diameter of bores, cylinders, housings, and similar features where high accuracy is required. It is well suited for inspection of engine cylinders, pump bores, valve bodies, and precision machined components. The 2 to 12 inch range, combined with five included extension rods, allows a single instrument to cover a wide span of bore sizes without switching tools. It is used by machinists, metrology technicians, and maintenance professionals in industrial, manufacturing, and heavy equipment service settings.

Key Features

• Measuring range of 2 to 12 inches with 0.001 inch graduation
• Accuracy of 0.0001 inches for high-precision bore measurement
• Friction thimble ensures consistent, repeatable measuring pressure
• Solid carbide measuring faces resist wear for extended service life
• Includes five extension rods to span the full measurement range
• Supplied with a calibration standard for micrometer head verification
• Ships pre-calibrated from the factory

Compatibility

Designed as a standalone inside tubular micrometer for general-purpose internal diameter measurement in industrial and precision machining applications. No specific system or machine compatibility is stated by the manufacturer for this instrument.

Installation Notes

This is a precision measuring instrument, not an installed component. Handle with care to avoid dropping or impacting the measuring faces or extension rods, as contact damage will affect accuracy. Verify calibration against the included standard before use and periodically during extended measurement sessions. Store in the provided case when not in use to protect the carbide faces and extension rods from contamination and mechanical damage.