Spi CMS160809180 Outside Micrometer 1 in Ratchet Stop

Product Description

The SPI CMS160809180 is a mechanical outside micrometer designed for precise linear measurement of external dimensions on machined parts, raw stock, and finished components. It covers a 1 inch measurement range with a graduation of 0.0001 inches and an accuracy of 0.0003 inches. The ratchet stop thimble delivers consistent measuring pressure, and the rotating spindle with solid carbide measuring faces resists wear during repeated use. A short-form certificate of calibration with NIST traceability is included, making this tool ready for use in quality-controlled shop environments. Machinists, toolmakers, and precision fabricators are the primary users.

This micrometer suits general-purpose dimensional inspection on the shop floor or in a metrology lab. It handles measurement tasks in metalworking, manufacturing, and precision machining where tolerances are tight and documentation of calibration status is required. The 6 inch throat depth accommodates a range of workpiece profiles. It is sold individually and ships with a protective case and calibration certificate.

Key Features

• 1 inch measurement range with 0.0001 inch graduation for fine resolution
• Accuracy of 0.0003 inches across the full range
• Ratchet stop thimble ensures repeatable, consistent spindle pressure
• Solid carbide measuring faces for extended wear life
• NIST-traceable short-form certificate of calibration included
• Rotating spindle design with lightweight enamel coating
• Includes protective carrying case

Compatibility

Designed as a standard mechanical outside micrometer suitable for general external dimensional measurement applications in machining and fabrication environments.

Installation Notes

This is a precision hand measuring tool, not an installed component. Before use, verify the zero setting against a calibration standard or the included certificate. Store in the provided case away from heat sources and contaminants that could affect calibration. Do not overtighten the spindle against the workpiece; use the ratchet stop to apply controlled, consistent pressure.