Starrett 51001 Micrometer Calibration Standard 17 in

Product Description

The STARRETT 51001 is a spherical end micrometer calibration standard designed to verify and maintain the accuracy of outside micrometers used in precision measurement applications. At 17 inches in length and calibrated to an accuracy of 0.00025 inches, this standard provides a reliable reference for technicians and machinists who depend on traceable measurement verification. The included heat insulating handle minimizes thermal transfer from the user's hand to the standard, helping to eliminate measurement errors caused by thermal expansion during use.

This calibration standard is suited for quality control environments, tool rooms, and metrology labs where micrometer accuracy must be confirmed at regular intervals. It is used by machinists, calibration technicians, and quality assurance professionals working with large-range outside micrometers. The spherical end contact design ensures consistent point contact across a range of micrometer anvil geometries, making it practical for routine gauge certification workflows.

Key Features

• 17-inch length accommodates large-range outside micrometer verification
• Calibrated accuracy to 0.00025 inches for precise reference measurement
• Spherical end contacts provide consistent point contact with micrometer anvils
• Includes heat insulating handle to reduce thermal expansion error during handling
• Factory calibrated for immediate use as a measurement reference standard

Compatibility

Designed as a calibration reference standard for use with outside micrometers requiring a 17-inch range verification standard.

Installation Notes

Calibration standards should be handled by the insulating handle to prevent body heat from affecting the reference length. Store the standard in its case when not in use to protect contact surfaces from damage or contamination. Calibration should be performed in a temperature-controlled environment consistent with standard metrology practice. Consult applicable calibration procedures and quality management requirements before placing this standard into a formal gauge control program.