Starrett 50999 Micrometer Calibration Standard 16 Inch

Product Description

The STARRETT 50999 is a spherical end micrometer calibration standard designed to verify and maintain the accuracy of outside micrometers used in precision measurement applications. At 16 inches in length and calibrated to an accuracy of 0.0002 inches, this standard provides a reliable reference for technicians and machinists who depend on traceable measurement verification. The included heat insulating handle prevents thermal expansion from body heat, which can introduce measurement error when working with high-precision gauging tools. This standard is a shop-floor and calibration lab instrument used wherever dimensional accuracy is critical.

This calibration standard is suited for use in machine shops, tool rooms, calibration labs, and manufacturing facilities where micrometer accuracy must be verified at regular intervals. It is used by machinists, quality control technicians, and metrology professionals to confirm that outside micrometers are performing within tolerance. The 16-inch length accommodates larger-range micrometers and is particularly useful for setups requiring longer-reach calibration references.

Key Features

• Calibrated accuracy up to 0.0002 inches for reliable precision verification
• 16-inch length supports larger-range outside micrometer calibration
• Spherical end design for consistent, repeatable contact point measurement
• Includes heat insulating handle to minimize thermal expansion errors during use
• Factory calibrated for immediate use as a measurement reference standard

Compatibility

Designed for use with outside micrometers requiring a long-range calibration reference standard. Consult your micrometer manufacturer specifications to confirm range compatibility before use.

Installation Notes

Calibration standards of this type are handled by metrology technicians or qualified machinists familiar with precision measurement practices. Always use the heat insulating handle when holding the standard to avoid dimensional changes caused by body heat transfer. Store the standard in its case when not in use and allow it to acclimate to ambient shop temperature before taking measurements. Periodic re-certification against traceable national standards is recommended to maintain calibration integrity.