Mitutoyo 103-139-10 Mechanical Outside Micrometer

Product Description

The MITUTOYO 103-139-10 is a mechanical outside micrometer built for dimensional measurement of external workpiece features in workshop and field environments. It delivers a graduation of 0.01 inches and an accuracy of 0.0001 inches, making it suitable for precision measurement tasks where repeatable results are required. The ratchet stop thimble controls measuring force consistently across readings, reducing operator variation. The measuring faces and anvil are solid carbide for long-term wear resistance. The lightweight workshop design keeps the tool manageable during extended use. A standard bar is included for calibration verification.

This micrometer is used in metalworking, machining, tooling, and general industrial inspection wherever outside diameter or thickness must be confirmed to four decimal places. It suits bench-level quality control work in job shops, production floors, and maintenance shops. Calibration technicians, machinists, and tool-and-die professionals are the primary users. The solid carbide contact surfaces extend service life in abrasive or high-cycle environments compared to standard steel faces.

Key Features

• Graduation of 0.01 inches with 0.0001-inch accuracy for precise outside measurements
• Solid carbide anvil and measuring face for extended wear resistance
• Ratchet stop thimble provides consistent, repeatable measuring force
• Lightweight workshop design for reduced hand fatigue during extended use
• Non-rotating spindle prevents part marking and improves measurement stability
• Includes standard bar for field calibration verification

Compatibility

Designed as a standard outside micrometer for general workshop and inspection use with workpieces requiring outside dimensional measurement to 0.0001-inch resolution.

Installation Notes

Outside micrometers require no installation but should be handled and stored by a qualified metrologist or machinist following the tool manufacturer's care guidelines. Before use, verify zero calibration with the included standard bar and wipe all contact surfaces clean. Store in the provided case away from temperature extremes, vibration, and direct contact with other tools. Do not overtighten the thimble or force the spindle against a workpiece.