Starrett 50995 Micrometer Calibration Standard 14 in

Product Description

The STARRETT 50995 is a spherical end micrometer calibration standard designed to verify and maintain the accuracy of outside micrometers used in precision measurement applications. Measuring 14 inches in length and calibrated to an accuracy of 0.00017 inches (rated up to 0.0002 inches), this standard provides a reliable reference for technicians who require tight dimensional control. It includes a heat insulating handle to prevent thermal expansion from body heat affecting the measurement reference during use. Calibration standards like this one are essential tools in any metrology-focused shop, toolroom, or quality control environment.

This calibration standard is suited for use in industrial, manufacturing, and trade shop environments where outside micrometers are regularly used to verify part dimensions. It is appropriate for toolroom technicians, quality control inspectors, and precision measurement professionals working with micrometers in the 14-inch range. The included heat insulating handle makes it practical for bench use without requiring gloves or elaborate thermal controls during the calibration process.

Key Features

• 14-inch maximum length provides reference coverage for large-range outside micrometers
• Calibrated accuracy to 0.00017 inches, rated up to 0.0002 inches
• Spherical end design for consistent, repeatable contact point engagement
• Includes heat insulating handle to minimize thermal error during use
• Factory calibrated — ready for immediate use as a measurement reference

Compatibility

Designed for use with outside micrometers requiring a 14-inch calibration reference standard. Suitable for any micrometer brand or model that accepts a spherical end calibration rod in this range.

Installation Notes

Calibration standards are handled and stored by metrology or toolroom personnel — they are not installed in the traditional sense. Always handle using the provided heat insulating handle to prevent body heat from introducing thermal expansion error into the reference. Store in a controlled environment away from temperature extremes and moisture. Periodic recertification by a qualified metrology lab is recommended to maintain traceability.