Fowler 52-240-007-1 Outside Micrometer 7 Inch

Product Description

The FOWLER 52-240-007-1 is a mechanical outside micrometer engineered for precision dimensional measurement in trade and inspection environments. It covers a measurement range up to 7 inches with a graduation of 0.0001 inches and an accuracy of 0.0003 inches. The ratchet stop thimble delivers consistent, repeatable gauging force, eliminating operator-to-operator variation on critical measurements. Solid carbide measuring faces resist wear during repeated contact with hardened or abrasive workpieces. Quick, easy zero adjustment on the sleeve keeps the instrument calibrated and ready for use without sending it out for service.

This micrometer is suited for machinists, tool-and-die technicians, quality control inspectors, and maintenance professionals who need reliable outside-diameter or thickness measurements on large workpieces. The 7-inch range makes it appropriate for shaft, bore, and flat-stock measurement tasks where smaller-frame micrometers cannot reach. It is a manual mechanical instrument with no digital counter and a non-rotating spindle, making it straightforward to read and maintain in shop conditions. Ships with a protective case and a sleeve wrench.

Key Features

• 7-inch maximum measurement range for large-scale outside measurements
• 0.0001-inch graduation for high-resolution readings
• 0.0003-inch accuracy for reliable dimensional verification
• Ratchet stop thimble ensures consistent gauging pressure and repeatable results
• Solid carbide measuring faces for extended wear life on hardened surfaces
• Quick zero adjustment on sleeve - no special tooling required for calibration
• Includes protective carrying case and sleeve wrench

Compatibility

Designed as a standard mechanical outside micrometer for general-purpose dimensional inspection and measurement tasks requiring a 7-inch range.

Installation Notes

Micrometers require no installation but should be zeroed and verified against a calibrated standard before use. Store the instrument in its case when not in use to protect the measuring faces and thimble from contamination and impact. Avoid leaving the spindle clamped against the anvil during storage, as thermal expansion can damage the measuring faces. Calibration intervals should follow shop quality-control procedures or applicable metrology standards.