Mitutoyo 177-315 Setting Ring 2.5 Inch Bore Gage Calibration Standard

The Mitutoyo 177-315 is a precision setting ring designed for accurate calibration and zeroing of measuring instruments. This 2.5-inch setting ring serves as a master reference standard for verifying and adjusting bore measurement tools to ensure dimensional accuracy.

Key Features:

• Precision-ground 2.5-inch internal diameter for accurate calibration reference
• Compatible with dial bore gages, Holtest internal micrometers, and inside micrometers
• Hardened and stabilized steel construction for long-term dimensional stability
• Enables quick zeroing and setting of bore measuring instruments
• Lapped finish provides reliable measurement reference surface

Setting rings are essential calibration tools that allow machinists and quality control professionals to establish accurate zero points on bore gages and internal measuring devices. By setting instruments against this known standard, users can verify measurement accuracy and detect instrument wear or calibration drift before measuring critical workpiece dimensions.