Spi 10-754-0 Mechanical Hole Micrometer 6 to 7 in

Product Description

The SPI 10-754-0 is a mechanical inside hole micrometer designed for precise bore and hole measurement in the 6 to 7 inch range. It delivers a graduation of 0.0002 inches and an accuracy of 0.0004 inches, making it suitable for close-tolerance inspection work in machine shops, manufacturing floors, and industrial maintenance environments. The measuring faces are solid carbide for long-term wear resistance. Three contact points provide stable, repeatable seating inside a bore. A ratchet stop thimble controls measuring pressure consistently from reading to reading. Licensed machinists, toolroom technicians, and quality control inspectors are the primary users of this instrument.

The SPI 10-754-0 is used wherever inside diameter measurement in the 6 to 7 inch range is required. Typical applications include inspecting large bores in engine blocks, hydraulic cylinders, pump housings, and machined castings. The self-aligning and self-centering contact point design reduces operator technique variation and is well suited to production inspection as well as job-shop measurement tasks. The 5.51 inch gage depth allows measurement reach into moderately deep bores.

Key Features

• Measurement range: 6 to 7 inches with 0.0002 inch graduation
• Accuracy rated at 0.0004 inches for close-tolerance inspection
• Solid carbide measuring anvils resist wear on hardened bores
• Three-point contact design is self-aligning and self-centering
• Ratchet stop thimble delivers consistent, controlled measuring force
• Gage depth of 5.51 inches accommodates moderately deep bore measurement

Compatibility

Designed as an OEM-style mechanical hole micrometer suitable for general inside diameter measurement applications requiring a 6 to 7 inch range.

Installation Notes

This instrument is used by machinists, toolroom technicians, and quality inspectors and requires no installation in the traditional sense. Before use, verify calibration against a known setting standard and zero the instrument according to the manufacturer procedure. Handle measuring faces with care to avoid contact with abrasive surfaces or dropping, as carbide anvils are hard but brittle. Store in the supplied case when not in use to protect the measuring surfaces and thimble mechanism.