Spi 10-709-4 Setting Ring 0.225 in Id 1.26 in Od

Product Description

The SPI 10-709-4 is a precision setting ring used to calibrate and verify bore gages, plug gages, and internal measuring instruments. It features an inside diameter of 0.225 inches, an outside diameter of 1.26 inches, and a thickness of 0.31 inches. The ring is manufactured to an accuracy of 0.00008 inches with a 10 micrometer surface smoothness, making it suitable for high-precision dimensional inspection work. This setting ring is used by quality control technicians and machinists in tool rooms, manufacturing facilities, and inspection labs where tight tolerances must be confirmed before or during production runs.

Setting rings of this size are typically used in applications requiring verification of small-bore measuring instruments. The 0.225 inch ID makes this ring appropriate for calibrating gages that measure bores in that range. It is well suited for light manufacturing, aerospace component inspection, and precision machining environments where internal diameter verification is a routine step in the quality assurance process.

Key Features

• Inside diameter of 0.225 inches for precise gage setting in small-bore applications
• Outside diameter of 1.26 inches providing a stable, handleable form factor
• Thickness of 0.31 inches for consistent gage contact and alignment
• Accuracy of 0.00008 inches for high-precision calibration requirements
• Surface smoothness of 10 micrometers supporting reliable instrument verification
• Sold individually, one ring per package

Compatibility

Designed as an OEM-style setting ring for use with bore gages and internal measuring instruments calibrated to a 0.225 inch nominal bore diameter.

Installation Notes

Setting rings are handled and used by metrology technicians and machinists in controlled inspection environments. Before use, clean the ring and the gage contact surfaces with a lint-free cloth to remove any debris or oil that could affect readings. Store the ring in its protective case when not in use to prevent surface damage. Do not drop or stack setting rings, as impact or scratching can compromise accuracy.