Starrett 67787 Micrometer Calibration Standard 35 Inches

Product Description

The STARRETT 67787 is a spherical end micrometer calibration standard designed to verify and maintain the accuracy of outside micrometers. At 35 inches in length, this calibration bar provides a precise reference dimension for checking micrometer accuracy across a wide measurement range. The 67787 ships calibrated and includes a heat insulating handle, which prevents thermal expansion from body heat during use — a critical detail when working to tight tolerances. This standard is used by metrology technicians, tool room machinists, and calibration lab personnel who require traceable, reliable reference tools.

This calibration standard is suited for use in tool cribs, calibration labs, and production environments where micrometer accuracy must be verified at regular intervals. The 35-inch length accommodates large-range outside micrometers and is appropriate for both shop floor verification checks and formal calibration procedures. The included heat insulating handle is essential for maintaining dimensional stability during handling.

Key Features

• 35-inch length provides a wide reference range for large outside micrometers
• Spherical ends ensure consistent, repeatable contact with micrometer anvils
• Ships factory calibrated for immediate use in verification procedures
• Includes heat insulating handle to minimize thermal expansion from hand contact
• Designed for use with standard outside micrometers

Compatibility

Designed as a calibration reference standard for use with outside micrometers requiring a 35-inch calibration bar.

Installation Notes

Calibration standards should be handled by the insulating handle at all times to prevent thermal transfer that can affect dimensional accuracy. Store the standard in its case when not in use and allow it to thermally stabilize to the ambient room temperature before use in calibration procedures. Verification and calibration work should be performed by qualified metrology or tool room personnel following applicable calibration procedures and documentation requirements.