Mitutoyo 103-218CAL Outside Micrometer 4 in Calibrated

Product Description

The MITUTOYO 103-218CAL is a mechanical outside micrometer designed for high-precision linear measurement in machining, fabrication, and metrology applications. It covers a 4-inch measurement range with a graduation of 0.0001 inches and an accuracy of plus or minus 0.000150 inches, making it suitable for close-tolerance inspection work. The micrometer features a ratchet stop thimble for consistent measuring force and a rotating spindle to prevent workpiece movement during measurement. Measuring faces and the anvil are solid carbide for durability and wear resistance. This unit ships calibrated with NIST traceability certification included.

This micrometer is used in precision measurement tasks across machine shops, manufacturing floors, and quality control environments. It is well suited for inspecting turned, milled, or ground components where dimensional tolerances are tight. Machinists, tool-and-die makers, and quality technicians are the primary users. The included plastic case protects the instrument during storage and transport between workstations or job sites. The satin chrome finish reduces glare under shop lighting and resists corrosion from typical shop-floor handling.

Key Features

• 4-inch measurement range with 0.0001-inch graduation for fine-resolution reading
• Accuracy of plus or minus 0.000150 inches suitable for close-tolerance inspection
• Ratchet stop thimble delivers repeatable, consistent measuring force
• Rotating spindle reduces torque on the workpiece during measurement
• Solid carbide anvil and measuring faces resist wear from repeated use
• Ships calibrated with NIST traceability certification included

Compatibility

Designed as an OEM-grade mechanical outside micrometer for general precision measurement of external dimensions up to 4 inches in diameter or thickness.

Installation Notes

Outside micrometers require no installation but should be handled and stored by qualified metrology or machining personnel. Before use, verify the zero calibration against the supplied standard or a certified gauge block. Keep the instrument away from heat sources, coolants, and cutting fluids that can affect calibration. Store in the provided plastic case when not in use to protect the measuring faces.