Selecting a Micrometer Head on Amazon.com
A micrometer head, also known as a micrometer stop, is an instrument that can be incorporated into a measuring device or mounted to machinery or alignment fixtures for precise measurements and fine positioning. It is commonly attached to a lathe to limit travel of the carriage assembly. Micrometer heads show readings on a vernier scale, a digit counter, or a digital readout, and may have more than one type of measurement display. They measure in inch, metric, or both inch and metric units. Among the factors to consider when selecting a micrometer head are thimble size, graduations or resolution, and accuracy. Micrometer heads are available with or without a spindle lock, clamping nut, and ratchet stop. The measuring face may be flat or spherical, and may have a carbide tip for improved wear resistance. A digital micrometer head may offer features such as absolute or incremental mode, reversible counting direction, and data output. Micrometer head manufacturers include Mitutoyo and Starrett.