Definition - What does Micrometer mean?

A Micrometer is a measuring device used for taking the exact measurement of an object. It is also known as micrometer screw gauge. It is often misunderstood for Micrometer (┬Ám), which is a standard unit of length measurement. Micrometer is mostly used by engineers in practical applications to measure an object's dimension. Another common name for a Micrometer is micrometer caliper, due to its similar appearance to caliper. The main components of the device are a spindle, ratchet and anvil, with which an object is fastened and measured.

Petropedia explains Micrometer

A Micrometer is a basic measurement device that yields exact dimensions of an object. Used mainly by engineers, this handy device is sometimes used along with scientific devices such as microscopes and telescopes to measure small objects. The primary use of a micrometer is to scale an object's dimensions. A basic handheld Micrometer has the following components:

  • Anvil face
  • Spindle face
  • Lock Nut
  • Spindle
  • Sleeve
  • Thimble
  • Ratchet
  • Frame

The object is kept between the spindle face and the anvil face, and the ratchet is moved in a clockwise direction. This causes the anvil face and spindle face to fasten the object. When the object is securely tightened between the two, the ratchet makes a click noise indicating that the object is tightened and the measurement can be taken. The measurement can be read from the scale that is available on the sleeve.

Based on the application, there are different types of Micrometers available. The following are the basic Micrometers:

  • Inside Micrometer
  • Outside Micrometer
  • Depth Micrometer
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