Spi MS160712029 Inside Tubular Micrometer 2-20 in

Product Description

The SPI MS160712029 is a mechanical inside tubular micrometer designed for precision internal measurement across a range of 2.0000 to 20.0000 inches. It delivers an accuracy of 0.000100 inches with a graduation of 0.001 inches, making it suited for high-tolerance bore and internal diameter work. The friction thimble provides consistent measuring force to reduce operator-induced error. Solid carbide measuring faces resist wear during repeated use. The instrument is supplied with a standard for micrometer head calibration, confirming it arrives ready for verified use. Metrologists, machinists, and quality control technicians are the primary users of this tool in manufacturing and inspection environments.

This micrometer is used in precision machining shops, toolrooms, and quality inspection stations where accurate internal bore measurement is required. It is well suited for measuring cylinders, bores, and large-diameter internal features that exceed the range of standard jaw-type or bore gauges. The set includes 6 extension rods, allowing the user to reach the full 2.0000 to 20.0000 inch measurement range with a single instrument. It is calibrated from the factory and includes a setting standard for ongoing field verification.

Key Features

• Measurement range: 2.0000 to 20.0000 inches
• Graduation of 0.001 inches with accuracy to 0.000100 inches
• Friction thimble for consistent, repeatable measuring force
• Solid carbide measuring faces for extended wear resistance
• Includes 6 extension rods to span the full measurement range
• Supplied with a calibration standard for micrometer head verification
• Factory calibrated; no digital counter or battery required

Compatibility

Designed as a standalone mechanical inside tubular micrometer for general precision internal measurement applications where a 2.0000 to 20.0000 inch range is required.

Installation Notes

This instrument is handled and used by machinists, metrologists, and quality technicians rather than installed in a system. Before use, verify calibration against the supplied standard and allow the tool and workpiece to reach the same ambient temperature to minimize thermal expansion error. Store extension rods and the calibration standard in the provided case to prevent damage to measuring surfaces. Do not apply excessive force when seating extension rods or engaging the measuring faces against a bore surface.