Reading Micrometers - 3: The Thimble Reading
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WARNING: Machine tools present a safety hazard. Improper operation can result in severe injury. These topics are for non-laboratory study only and are not to be used in conjunction with the operation of any tool or machine described herein. Never use a machine tool without the supervision of a qualified instructor.
The thimble has 25 divisions marked on the beveled part as shown above. Each division represents .001 movement. If the thimble is rotated in the direction shown in the photo above then for each division marker the micrometer opens up .001.
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label: micrometer, history, anvil, thimble, spindle, frame, barrel, ratchet, adjustment, holding, handling, reading, vernier , metric, electronic