Mitutoyo 103-138 Mechanical Outside Micrometer

Product Description

The MITUTOYO 103-138 is a mechanical outside micrometer built for precise dimensional measurement in workshop and field environments. It delivers an accuracy of 0.0001 inches with a graduation of 0.01 inches, making it suitable for close-tolerance inspection work. The anvil and measuring face are machined from solid carbide for long-term wear resistance. A ratchet stop thimble controls measuring force and promotes repeatable readings. The instrument features a lightweight workshop design and ships with a standard reference bar. Installation and calibration are handled by machinists, quality technicians, and precision measurement professionals.

The 103-138 is used in manufacturing, toolroom, and inspection applications where outside diameter, thickness, or width measurements are required to four decimal places. It is suited for general workshop use across metalworking, machining, and precision fabrication environments. The lightweight frame reduces operator fatigue during repetitive measurement tasks. A standard bar is included to support zeroing and field verification of the instrument before use.

Key Features

• Accuracy of 0.0001 inches for close-tolerance dimensional inspection
• 0.01 inch graduation for direct reading without interpolation
• Solid carbide anvil and measuring face for extended wear life
• Ratchet stop thimble ensures consistent, repeatable measuring force
• Lightweight workshop design reduces fatigue during high-volume use
• Includes standard reference bar for field zeroing and verification

Compatibility

Designed as an OEM-style outside micrometer suitable for general workshop and inspection use where mechanical inch-graduation micrometers are specified.

Installation Notes

Outside micrometers require no mechanical installation but should be zeroed against the included standard bar before use. Keep the measuring faces clean and free of debris to maintain accuracy. Store the instrument in its case when not in use and avoid dropping or impacting the frame. Calibration intervals should follow the requirements of the applicable quality management or metrology program in use at your facility.