Mitutoyo 177-187 Setting Ring 2in Id Satin Chrome

Product Description

The MITUTOYO 177-187 is a precision setting ring used to calibrate and verify bore gauges, internal micrometers, and similar inside-diameter measuring instruments. With a 2.0000 inch inside diameter, a 3.35 inch outside diameter, and a thickness of 0.79 inches, this ring provides a traceable master reference for setting instruments before measurement. Accuracy is held to 0.000060 inches, making it suitable for high-tolerance inspection work. The satin chrome finish resists corrosion and reduces glare during use. This is a single-piece unit, sold individually.

Setting rings are used in quality control, metrology labs, machine shops, and production inspection environments. The 177-187 is appropriate for applications requiring a 2-inch nominal inside diameter master reference. Typical users include dimensional inspectors, toolroom machinists, and calibration technicians working to tight tolerances in industrial, aerospace, or manufacturing settings. It is used at the bench or on the shop floor wherever bore gauges require zeroing or verification before a measurement run.

Key Features

• 2.0000 inch inside diameter with 0.000060 inch accuracy for high-precision gauge setting
• Satin chrome finish for corrosion resistance and reduced surface glare
• 0.79 inch thickness provides stable, repeatable seating of gauge contacts
• 3.35 inch outside diameter allows secure handling without distorting the bore
• Single-piece unit designed for bench or floor use in inspection and calibration workflows

Compatibility

Designed as an OEM-style master reference for use with bore gauges and internal measuring instruments requiring a 2-inch nominal inside diameter setting standard.

Installation Notes

Setting rings are handled and stored by calibration technicians and dimensional inspection personnel, not field tradespeople. Keep the ring clean and free of chips, oil film, or debris before use, as surface contamination will affect gauge zeroing accuracy. Store in the supplied case or a protected location away from temperature extremes to maintain dimensional stability. Do not drop or impact the ring, as this can alter the inside diameter and invalidate its use as a reference standard.