Spi CMS160622025 Setting Ring 5.5 in Id 7.87 in Od

Product Description

The SPI CMS160622025 is a precision setting ring used to calibrate and verify bore gauges, plug gauges, and similar internal measurement instruments. With a 5.5-inch inside diameter, 7.87-inch outside diameter, and 0.78-inch thickness, this ring provides a stable, accurate reference master for shop-floor and metrology applications. The bright, uncoated finish is standard for high-precision gage tooling and supports consistent surface reflectivity during inspection. Accuracy is held to 0.000160 inches, making this ring suitable for demanding dimensional verification work in manufacturing and quality control environments. Machinists, quality technicians, and metrology professionals are the primary users.

Setting rings of this size are typically used in production environments where large-bore measurement tools require frequent zeroing or calibration checks. This part is well suited for use with internal micrometers, air gauges, and bore gauges configured for large-diameter workpieces. Applications include heavy equipment manufacturing, large-diameter pipe and fitting inspection, aerospace component verification, and industrial pump or motor bore checking. The ring is appropriate for both bench-top and in-line quality control setups.

Key Features

• 5.5-inch inside diameter provides a precise master reference for large-bore gauge calibration
• Accuracy held to 0.000160 inches for reliable dimensional verification
• Bright, uncoated finish for consistent surface condition and easy inspection
• 0.78-inch thickness offers a stable seating surface for gauge contact
• Sold individually as a single unit

Compatibility

Designed as an OEM-style reference standard compatible with bore gauges, plug gauges, and internal measuring instruments requiring a 5.5-inch inside diameter master ring for calibration or zeroing.

Installation Notes

Setting rings are handled by quality technicians and metrology personnel, not typically field-installed. Store the ring in a clean, temperature-stable environment to prevent thermal expansion errors. Handle with clean cotton gloves to avoid surface contamination that could affect measurement accuracy. Follow your gauge manufacturer's calibration procedure when using this ring as a reference master.