Spi CMS161205005 Outside Micrometer 4 Inch

Product Description

The SPI CMS161205005 is a mechanical outside micrometer designed for high-precision linear measurement in machining, manufacturing, and metrology applications. It covers a measurement range of 0 to 4 inches with a graduation of 0.0001 inches and an accuracy of 0.0002 inches. The ratchet stop thimble provides consistent measuring pressure, reducing operator-to-operator variation. Measuring faces are solid carbide for extended wear resistance. The unit ships calibrated and includes a NIST traceability certificate, making it ready for use in quality-controlled environments. Machinists, tool-and-die technicians, and metrology professionals are the primary users of this instrument.

This outside micrometer is suited for precision inspection and dimensional verification of cylindrical and flat workpieces in job shops, production floors, and quality labs. The rotating spindle and ratchet stop thimble support repeatable measurements across extended use. It is packaged with a protective case and a short-form certificate of calibration with NIST traceability standards, making it appropriate for ISO-compliant and regulated inspection environments.

Key Features

• Measurement range of 0 to 4 inches with 0.0001 inch graduation
• Accuracy of 0.0002 inches for high-precision dimensional inspection
• Ratchet stop thimble ensures consistent, repeatable measuring pressure
• Solid carbide measuring faces resist wear for long service life
• Rotating spindle with 0.25 inch spindle diameter
• Ships calibrated with NIST traceability certificate and protective case
• Hammertone and baked enamel coating for corrosion resistance and durability

Compatibility

Designed as a general-purpose mechanical outside micrometer for precision measurement of external dimensions on machined parts and workpieces up to 4 inches in diameter or thickness.

Installation Notes

This instrument requires no installation but should be handled and stored by trained metrology or machining personnel following established gauge-handling procedures. Before use, verify the zero setting against the supplied calibration standards and store the micrometer in the included protective case when not in use. Avoid dropping or exposing the instrument to excessive heat, as this can affect calibration. Periodic recalibration against NIST-traceable standards is recommended to maintain measurement accuracy.