Starrett T444.1XRL-4 Outside Micrometer 4 in Range

Product Description

The STARRETT T444.1XRL-4 is a mechanical outside micrometer designed for precision linear measurement in machining, fabrication, and inspection work. It covers a measurement range up to 4 inches with a graduation of 0.0001 inches and an accuracy of 0.0001 inches, making it suitable for close-tolerance work where reliable repeatability matters. The thimble uses a ratchet stop mechanism to deliver consistent measuring force across readings, and the rotating spindle aids in smooth, accurate contact. Measuring faces are solid carbide for wear resistance under repeated use. This tool is used by machinists, toolmakers, quality control technicians, and skilled tradespeople who require verified dimensional accuracy.

The T444.1XRL-4 is appropriate for precision measurement tasks in machine shops, manufacturing facilities, and field inspection environments. It handles external diameter, thickness, and length measurements on metal, plastic, and other solid materials up to 4 inches. The satin chrome finish reduces glare during use. A ring-style lock nut holds the spindle in position once a measurement is set. The micrometer ships with a protective case and a wrench, giving the user everything needed to put it into service immediately.

Key Features

• Measurement range up to 4 inches with 0.0001 inch graduation
• Accuracy of 0.0001 inches for close-tolerance inspection work
• Ratchet stop thimble ensures consistent measuring force across readings
• Rotating spindle for smooth, precise contact with workpiece
• Solid carbide measuring faces resist wear over extended service life
• Ring lock nut secures spindle position when recording or transferring measurements
• Includes protective case and wrench

Compatibility

Designed as a precision outside micrometer for general mechanical measurement applications requiring a 4-inch range and 0.0001 inch resolution.

Installation Notes

No power source or wiring is required for this mechanical instrument. Before use, verify the micrometer reads zero at its reference point and use the included wrench to adjust the anvil if calibration is needed. Store the instrument in the included case when not in use to protect the carbide measuring faces and maintain calibration. Handle with clean, dry hands or inspection gloves to prevent corrosion from skin contact.