Spi 12-446-1 Setting Ring 0.1 in Id 0.98 in Od Silver

Product Description

The SPI 12-446-1 is a precision setting ring used to calibrate and verify bore gauges, plug gauges, and other internal measuring instruments. It features an inside diameter of 0.1 inches, an outside diameter of 0.98 inches, and a thickness of 0.28 inches. The ring holds an accuracy of 0.00006 inches, making it suitable for high-precision measurement tasks in tool rooms, quality control labs, and manufacturing environments. Metrology technicians and quality assurance professionals use setting rings like this one to establish a known reference diameter before taking bore measurements.

This setting ring is appropriate for use in precision measurement applications where tight dimensional tolerances must be confirmed. It is commonly found in production inspection environments, machine shops, and calibration labs. The silver finish is typical of hardened and ground setting rings used as master gauges. Technicians use this ring to zero or confirm bore gauge readings prior to measuring workpiece bores in close-tolerance applications.

Key Features

• Inside diameter of 0.1 inches for precise gauge calibration at that bore size
• Outside diameter of 0.98 inches for secure handling during calibration setup
• Thickness of 0.28 inches provides adequate gauge contact surface
• Accuracy of 0.00006 inches supports high-precision metrology work
• Silver finish consistent with hardened and ground precision gauge rings

Compatibility

Designed as a reference master for bore gauges and plug gauge sets requiring a 0.1-inch inside diameter setting standard. Verify gauge manufacturer specifications before use to confirm dimensional fit.

Installation Notes

Setting rings are handled and stored by metrology or quality control personnel, not field tradespeople. Keep the ring clean and free of debris before use, as surface contamination will affect gauge zeroing accuracy. Store in a protective case away from temperature extremes to maintain dimensional stability. Do not use setting rings as mechanical components or subject them to impact.