Starrett 52451 Mechanical Micrometer Head 0-0.5 in

Product Description

The STARRETT 52451 is a mechanical micrometer head designed for precision linear measurement in tooling, fixture, and inspection applications. It delivers an accuracy of 0.0001 inches across a measurement range of 0 to 0.5 inches. The satin chrome finish resists corrosion, and the carbide measuring face provides long-term wear resistance under repeated use. The advanced sleeve features staggered lines and distinct figures for clear, easy readability without a digital counter. A rotating spindle with a flat tip and clamp nut allows for secure positioning once a measurement is set. Licensed machinists, tool and die makers, and precision inspection technicians are the primary users.

This micrometer head suits bench-mounted measuring setups, custom fixtures, and machine tool applications where a standard handheld micrometer cannot be integrated directly. The 9.53 mm stem diameter with a 12.70 mm stem length allows mounting into standard micrometer head bores. The 19.05 mm spindle length provides adequate travel for most short-range positioning tasks. It is well suited to machine shops, quality control benches, and production environments requiring repeatable, fine-tolerance measurement or positioning.

Key Features

• 0.0001-inch accuracy across the full 0 to 0.5-inch measurement range
• Carbide measuring face for extended wear life in high-cycle applications
• Satin chrome finish for corrosion resistance and reduced glare
• Advanced sleeve design with staggered lines and distinct figures for fast, precise readability
• Rotating spindle with flat tip and clamp nut included for secure locking
• No digital counter — purely mechanical for environments where electronics are not preferred

Compatibility

Designed as an OEM-style replacement or upgrade micrometer head for standard fixture and tooling mounts accepting a 9.53 mm stem diameter.

Installation Notes

Installation is performed by machinists or precision instrument technicians. The micrometer head mounts into a bored fixture or tooling block using the supplied clamp nut; ensure the mounting bore matches the 9.53 mm stem diameter before installation. Remove all load from the fixture and zero the spindle before securing the clamp nut to avoid introducing measurement error. Follow any applicable shop metrology procedures or ISO calibration standards relevant to the application.