How Do You Use And Read An Outside Micrometer?
Machinists, manufacturing and engine professionals use an outside micrometer to measure the outside diameter of a cylindrical or spherical object to one ten-thousandth of an inch (.0001). Micrometers typically measure in ranges of 1″ . In this particular example, the micrometer measures the range from 2″ to 3″. This instrument is highly heat sensitive and should be stored at room temperature and so should the object being measured otherwise the reading could be wrong. When storing the measuring contacts points should be left away from each other (open) so that temperature variations do not stress the device. Become familiar with the anatomy of a micrometer. The following numbers correspond to the diagram in the introduction. • Thimble • Thimble scale • Stock • Thimble lock • Spindle • Anvil • Body • Place the object between the anvil and spindle. • Spin the ratchet until the spindle meets object. • Spin ratchet until you hear 3 clicks. • Verify both the anvil and spindle are touching t
