Spi CMS160725042 Mechanical Hole Micrometer 2-2.5 in

Product Description

The SPI CMS160725042 is a mechanical inside hole micrometer designed for precise bore and hole measurement in industrial and machining environments. It covers a measurement range of 2 inches to 2.5 inches with a graduation of 0.0002 inches and an accuracy of 0.0002 inches. The chrome-finished instrument features a ratchet stop thimble, three self-centering contact points, and carbide measuring surfaces for durability and repeatable readings. A NIST traceability certification is included, making it suitable for quality-controlled production floors and inspection departments. Machinists, metrologists, and precision manufacturing technicians are the primary users of this instrument.

This hole micrometer is suited for measuring bores, cylinders, and inside diameters in the 2 inch to 2.5 inch range. It is appropriate for use in machine shops, toolrooms, and quality inspection settings where tight tolerances must be verified. The instrument includes one extension rod, which extends up to 6 inches, and a 2.5 inch setting ring for calibration. A gage depth of 4.49 inches supports access to deeper bore features. The three-point self-centering contact design helps achieve accurate, repeatable measurements without manual alignment correction.

Key Features

• Measurement range of 2 inches to 2.5 inches with 0.0002 inch graduation
• Accuracy rated at 0.0002 inches for precision inspection work
• Carbide measuring surfaces resist wear over repeated use
• Ratchet stop thimble provides consistent measuring pressure
• Three self-centering contact points for accurate bore alignment
• NIST traceability certification included for quality-compliance applications
• Includes one extension rod and one 2.5 inch setting ring

Compatibility

Designed for inside bore and hole measurement applications requiring a 2 inch to 2.5 inch range. Compatible with standard toolroom and quality inspection workflows using three-point inside micrometers.

Installation Notes

This instrument is used by machinists and quality control technicians and requires no permanent installation. Before use, zero and calibrate the micrometer using the included setting ring on a flat, stable surface. Handle carbide contact points carefully to avoid damage from drops or impact. Store in the provided case when not in use to protect the calibrated surfaces and maintain measurement integrity.