Fowler 52-240-008-1 Mechanical Outside Micrometer 8 in

Product Description

The FOWLER 52-240-008-1 is a mechanical outside micrometer designed for precision measurement of external dimensions up to 8 inches. It delivers an accuracy of 0.0003 inches and a graduation of 0.0001 inches, making it suitable for close-tolerance inspection and verification tasks in machine shops, fabrication environments, and mechanical trade work. The ratchet stop thimble provides consistent, repeatable measuring pressure, reducing operator error during repeated measurements. Solid carbide measuring faces resist wear under frequent use. A quick, easy zero adjustment on the sleeve allows the technician to recalibrate without removing the tool from service.

This micrometer is used wherever precise external measurements are required at the upper end of standard hand-tool range. Typical applications include shaft and bore verification, part inspection, and dimensional quality control in metalworking, HVAC equipment fabrication, and mechanical service. It is appropriate for journeymen machinists, tool-and-die technicians, and any trade professional requiring traceable dimensional verification at 8 inches maximum span. The included case and wrench keep the tool protected and calibration-ready between jobs.

Key Features

• 8 inch maximum measurement range for large-diameter external measurements
• 0.0001 inch graduation for fine resolution readings
• 0.0003 inch accuracy for close-tolerance inspection work
• Ratchet stop thimble ensures consistent measuring pressure across operators
• Solid carbide measuring faces provide long-term wear resistance
• Quick zero adjustment on sleeve simplifies field recalibration
• Includes protective case and wrench for storage and adjustment

Compatibility

Designed as a general-purpose mechanical outside micrometer for professional and industrial use where external measurements up to 8 inches are required.

Installation Notes

This tool is a precision measuring instrument and does not require installation. Store in the provided case when not in use to protect the measuring faces and maintain calibration. Before use, verify zero setting with the included wrench and clean measuring faces with a lint-free cloth. Do not overtighten against a workpiece; rely on the ratchet stop thimble to apply correct measuring pressure.