Starrett 72734 Mechanical Outside Micrometer 7 in Range

Product Description

The STARRETT 72734 is a mechanical outside micrometer designed for precise dimensional measurement across a 7-inch range. It delivers an accuracy of 0.0001 inches and features a ratchet stop thimble for consistent, repeatable measuring pressure on every reading. Measuring faces are solid carbide for long-term wear resistance in shop environments. A ring-style lock nut holds the spindle position during transfer measurements. This tool is used by machinists, tool-and-die workers, and quality-control technicians who require reliable precision in manual inspection work.

The 72734 is suited for outside diameter and flat-surface measurements on machined components, shafts, castings, and similar workpieces up to 7 inches. The hammertone baked enamel frame finish provides corrosion resistance in typical shop conditions. The ratchet stop thimble mechanism allows the user to apply uniform measuring force without over-tightening, which is critical when working to tolerances in the 0.0001-inch range. It ships with a lock nut and wrench included.

Key Features

• 7-inch maximum measurement range with 0.0001-inch graduation and 0.0001-inch accuracy
• Ratchet stop thimble for consistent, repeatable measuring force
• Solid carbide measuring faces for extended wear life
• Ring-type lock nut included for spindle position hold
• Flat anvil and 0.3-inch anvil and spindle diameter
• Hammertone baked enamel frame finish for corrosion resistance

Compatibility

Designed as an OEM-style precision outside micrometer for manual dimensional inspection applications requiring a 7-inch measurement range. Also referenced as Starrett Number T436XRL-7.

Installation Notes

Calibration and use should be performed by a qualified machinist or metrology technician familiar with micrometer standards and practices. Before use, clean the anvil and spindle faces and verify zero calibration with a reference standard appropriate to the measurement range. The lock nut and wrench provided should be used to secure the thimble position when transferring measurements. Store in a protective case away from heat sources and corrosive materials to preserve calibration integrity.