Starrett 50983 Micrometer Calibration Standard 8 in

Product Description

The STARRETT 50983 is a spherical end micrometer calibration standard used to verify and maintain the accuracy of outside micrometers in calibration and quality-control workflows. Measuring 8 inches in length, it delivers accuracy up to 0.00015 inches, making it suitable for precision metrology applications where tight tolerances are critical. The standard ships calibrated and includes a heat insulating handle to prevent thermal expansion from hand contact during use. Calibration technicians, tool-room machinists, and quality inspectors use this type of standard as a reference artifact in regular gage verification programs.

This calibration standard is designed for use with outside micrometers that require a traceable reference for zeroing, verification, or periodic calibration checks. It is appropriate for shop-floor quality programs, tool crib operations, and laboratory metrology environments. The included heat insulating handle is a practical feature in production settings where repeated handling could otherwise introduce measurement error through thermal growth of the standard itself.

Key Features

• 8-inch overall length for micrometer range verification at that nominal size
• Accuracy up to 0.00015 inches for high-precision calibration use
• Ships calibrated and ready for immediate use as a reference standard
• Includes heat insulating handle to minimize thermal error from handling
• Spherical end geometry ensures consistent and repeatable contact points

Compatibility

Designed for use with outside micrometers requiring an 8-inch calibration reference standard. Confirm micrometer range and anvil contact type before use.

Installation Notes

This calibration standard is handled by metrology technicians and quality-control personnel rather than installed in a system. Store the standard in its protective case when not in use to prevent surface damage that could affect accuracy. Allow the standard to thermalize to the measurement environment before use to minimize dimensional variation from temperature differences. Always use the heat insulating handle during measurement to avoid introducing thermal error from hand contact.