Spi 10-702-9 Mechanical Hole Micrometer 0.225 Inch Range

Product Description

The SPI 10-702-9 is a mechanical inside hole micrometer designed for precision bore measurement in machining, toolroom, and inspection applications. It measures holes up to 0.225 inches with a graduation of 0.0001 inches and an accuracy of 0.0002 inches, making it suitable for close-tolerance work where reliable repeatability is required. The ratchet stop thimble controls measuring pressure to promote consistent readings across multiple measurements. Solid carbide measuring anvils provide wear resistance for extended service life in production environments. This instrument is installed and used by machinists, tool and die makers, and quality control technicians.

The SPI 10-702-9 is suited for measuring small-diameter bores, holes, and internal features in precision machined components. Its self-aligning and self-centering three-contact-point design simplifies positioning inside the bore, reducing operator technique variation. A gage depth of 0.78 inches allows access to typical through-holes and counterbores encountered in toolroom and light manufacturing work. The setting ring diameter matches the maximum measurement range at 0.225 inches for accurate calibration of the instrument before use.

Key Features

• Measurement range up to 0.225 inches with 0.0001-inch graduation
• Accuracy of 0.0002 inches for close-tolerance inspection
• Ratchet stop thimble for controlled, repeatable measuring pressure
• Solid carbide measuring anvils resist wear in production use
• Self-aligning and self-centering three-contact-point design
• Gage depth of 0.78 inches for access to standard bore depths

Compatibility

Designed as an OEM-style precision measuring instrument for use in toolroom, machining, and quality inspection environments requiring small internal bore measurement up to 0.225 inches.

Installation Notes

This instrument is used by machinists and quality technicians and requires no installation in the traditional sense. Before use, zero and verify the micrometer against its setting ring or a calibrated standard in accordance with your facility's metrology procedures. Handle carbide anvils carefully to avoid chipping from impact or improper storage. Store in a protective case away from temperature extremes to maintain calibration integrity.