Spi MS160712018 Micrometer Calibration Standard 18 in

Product Description

The SPI MS160712018 is an 18-inch micrometer calibration standard designed to verify and maintain the accuracy of outside micrometers used in precision measurement applications. Built with a spherical end profile, this calibration bar delivers accuracy up to 0.0002 inches, making it suitable for quality control and tool certification workflows. A heat-insulating handle is included to prevent thermal expansion from hand contact during use, preserving measurement integrity. Metrology technicians, tool calibration specialists, and precision machinists rely on this type of standard to confirm that micrometers are reading within acceptable tolerance before production or inspection begins.

This calibration standard is intended for shop-floor and laboratory environments where micrometer accuracy must be verified at 18 inches of reach. Typical applications include periodic tool certification, incoming inspection setups, and gage R and R studies. The spherical end geometry ensures consistent, repeatable contact during calibration checks. The unit ships factory calibrated and is ready for use upon receipt.

Key Features

• 18-inch maximum length for calibrating large-range outside micrometers
• Accuracy up to 0.0002 inches for precision verification work
• Spherical end shape provides consistent contact point during calibration
• Factory calibrated — ready for immediate use
• Includes heat-insulating handle to minimize thermal error from handling

Compatibility

Designed for use with outside micrometers requiring an 18-inch calibration reference standard. Confirm your micrometer range and end-contact type before use.

Installation Notes

Calibration standards are handled and stored by metrology or quality control personnel — no installation tools or trade licensing are required. Always hold the standard by the heat-insulating handle to avoid transferring body heat, which can cause thermal expansion and introduce measurement error. Store the standard in its case when not in use, away from temperature extremes and humidity. Follow your facility's calibration interval and traceability procedures when using this standard to certify micrometers.