Spi 10-738-3 Setting Ring 1 in Id 2.5 in Od

Product Description

The SPI 10-738-3 is a precision setting ring used to calibrate and verify internal measuring instruments such as bore gauges, plug gauges, and air gauges. It features a 1 inch inside diameter, a 2.5 inch outside diameter, and a thickness of 0.63 inches. The ring holds a dimensional accuracy of 0.0001 inches and a surface smoothness of 10 micrometers, making it suitable for high-precision metrology work in manufacturing, machine shops, and quality control environments. This type of ring gauge is typically handled by machinists, quality technicians, and metrologists who require reliable reference standards for day-to-day inspection work.

Setting rings are used in applications where internal gauging instruments must be zeroed or verified before use. This ring is appropriate for use on production floors, inspection departments, and tool rooms where consistent bore measurement accuracy is required. Its silver finish and solid construction support repeated use over time without significant dimensional drift. The 0.0001 inch accuracy class makes it compatible with fine-tolerance inspection tasks in both job-shop and high-volume manufacturing settings.

Key Features

• 1 inch inside diameter for direct use as a reference standard on 1 inch bore gauges
• 0.0001 inch dimensional accuracy for high-precision calibration and verification
• 10 micrometer surface smoothness supports reliable gauge contact and repeatable readings
• 0.63 inch thickness provides stable handling and gauge seating
• Silver finish construction suited for metrology-grade use

Compatibility

Designed as an OEM-style reference standard for use with internal bore gauges, air gauges, and plug gauges requiring a 1 inch nominal setting ring.

Installation Notes

Setting rings are handled by qualified metrology or quality control personnel and do not require mechanical installation. Store the ring in its protective case when not in use to prevent surface damage or contamination that could affect accuracy. Clean contact surfaces with an appropriate gauge cleaning solution before use. Avoid dropping or impacting the ring, as this can alter its dimensional integrity.