What is the primary use of an outside micrometer?

The primary use of an outside micrometer is to measure the outside dimensions of objects with a high degree of accuracy, typically to the nearest thousandth of an inch. This tool features a calibrated screw mechanism that allows for precise measurement of the thickness or diameter of various materials, making it essential for applications that require exact specifications, such as in manufacturing and mechanical engineering.

Outside micrometers are widely used in situations where measuring the outside diameter of cylindrical objects is necessary, such as rods, shafts, or any components where the external dimension is critical for proper fitting or assembly. The precision and reliability of outside micrometers make them a preferred choice in contexts requiring exactness, contributing to their primary designation for measuring external dimensions as opposed to internal ones, lengths, or thicknesses, which are typically the focus of other measuring tools.