Starrett 73722 Mechanical Micrometer Head 1 Inch Ratchet

Product Description

The STARRETT 73722 is a mechanical micrometer head designed for precision linear measurement in toolroom, machining, and metrology applications. It covers a measurement range from 0 to 1 inch and features a 0.75-inch-diameter thimble with a ratchet-style drive mechanism. The ratchet thimble provides consistent, repeatable spindle pressure, which is critical for accurate readings across multiple measurement cycles. A rotating spindle allows the head to be integrated into custom fixtures and measuring instruments. This head does not include a digital counter, making it a straightforward analog instrument suited to technicians and machinists who work with traditional vernier or graduated-sleeve reading methods.

The STARRETT 73722 is well suited for use in precision machining environments, quality control stations, and custom gauging fixtures. It is appropriate for both bench-mounted and fixture-integrated applications where a reliable, analog micrometer head is required. The ratchet thimble design makes it particularly useful in repetitive inspection tasks where consistent measuring force must be maintained between readings. Licensed metrologists, tool and die makers, and CNC setup technicians are the primary installers and users of this type of component.

Key Features

• 0 to 1 inch measurement range for standard linear gauging tasks
• 0.75-inch thimble diameter for comfortable grip and precise rotation
• Ratchet thimble mechanism ensures consistent spindle pressure during measurement
• Rotating spindle allows integration into custom fixtures and gauging assemblies
• Analog graduation with no digital counter — straightforward to read and maintain

Compatibility

Designed as an OEM-style replacement or upgrade micrometer head for custom fixtures, gauging assemblies, and precision measurement instruments requiring a 1-inch-range mechanical micrometer head with a ratchet thimble.

Installation Notes

Installation is typically performed by a machinist or metrologist integrating the head into a custom fixture or measuring stand. Secure mounting threads should be engaged carefully to avoid cross-threading and to maintain spindle alignment. Before use, verify that the spindle is clean and free of debris to ensure accurate zero-setting. Consult applicable calibration standards and metrology lab protocols when placing this head into a production measurement system.