Spi 10-748-1 Setting Ring 2 in Id 4-7/16 in Od

Product Description

The SPI 10-748-1 is a precision setting ring used to calibrate and verify bore gages, plug gages, and other internal measuring instruments. It features a 2-inch inside diameter, a 4-7/16-inch outside diameter, and a thickness of 0.787 inches. Dimensional accuracy is held to 0.0001 inches, and surface smoothness is finished to 10 micrometers, making it suitable for demanding inspection and quality-control environments. Machinists, metrology technicians, and quality engineers use this ring to establish reference standards for internal bore measurement work.

This setting ring is designed for use in precision metrology and dimensional inspection applications. It is commonly found in machine shops, manufacturing facilities, and calibration labs where accurate bore gage setup is required. The ring provides a traceable master reference for setting internal measuring instruments prior to production inspection or incoming quality checks. Its silver finish and rigid construction support consistent, repeatable results across multiple setup cycles.

Key Features

• 2-inch inside diameter for use with corresponding bore and plug gage sets
• 0.0001-inch dimensional accuracy for tight-tolerance inspection applications
• 10-micrometer surface smoothness for consistent gage contact
• 0.787-inch thickness provides stable seating during instrument setup
• Silver finish indicates a lapped and precision-ground reference surface

Compatibility

Designed as a precision master reference ring for bore gages and plug gages requiring a 2-inch internal diameter setting standard. Consult your gage manufacturer for specific setting ring requirements before use.

Installation Notes

Setting rings are handled and stored by metrology technicians or quality-control personnel, not installed in the field. Keep the ring protected in its case when not in use to prevent surface damage. Clean contact surfaces with a lint-free cloth and appropriate solvent before each use. Allow the ring and the gage being set to thermally stabilize at the same ambient temperature before taking reference measurements.