Starrett 50976 Micrometer Calibration Standard 100mm

Product Description

The STARRETT 50976 is a 100mm spherical end micrometer calibration standard designed for verifying and calibrating outside micrometers in precision measurement environments. The spherical end design ensures repeatable point contact, minimizing measurement error during calibration checks. At 100mm in length with a stated accuracy of 0.0025 mm, this standard provides a reliable reference for maintaining instrument traceability. A heat insulating handle is included to prevent thermal expansion from hand contact, which would otherwise introduce error into the calibration reading. This standard is intended for use by metrology technicians, tool crib personnel, and calibration labs.

This calibration standard is suited for shop floor, lab, and field calibration applications where outside micrometers require periodic verification. It is appropriate for use in manufacturing, quality control, and maintenance environments where dimensional accuracy is critical. The included heat insulating handle makes it practical for bench use without requiring gloves or waiting for temperature stabilization.

Key Features

• 100mm nominal length for calibrating outside micrometers in that range
• Spherical end contact ensures consistent, repeatable point measurement
• Accuracy of 0.0025 mm for reliable reference use
• Pre-calibrated from the factory — ready for immediate use
• Includes heat insulating handle to reduce thermal measurement error

Compatibility

Designed for use with outside micrometers requiring a 100mm calibration reference standard.

Installation Notes

Calibration standards should be handled only by the insulating handle to prevent body heat from affecting dimensional accuracy. Allow the standard to reach ambient temperature before use if it has been stored in a significantly different environment. Verification and use of calibration standards should follow applicable quality system procedures such as ISO 9001 or equivalent metrology protocols. Store in a protective case away from contaminants when not in use.