Using a Micrometer

Calibration

note
When calibrating, always refer to the instructions supplied with the micrometer.

  • The thimble is fixed to the spindle so that both components turn together.

  • The sleeve is fixed to one end of the frame. It has graduations and an index line to aid the reading of the graduations on the thimble.

micrometer_3

  1. Micrometer frame

  2. Anvil

  3. Spindle

  4. Sleeve

  5. Thimble

Measuring

  1. Hold the micrometer frame and place the item to be measured between the anvil and spindle.
  2. Using the ratchet adjuster, close the spindle until the ratchet freely clicks.
  3. Lock the thimble using the locking device.
    4. micrometer_2

    1. Micrometer frame

    2. Sleeve

    3. Thimble

    4. Ratchet adjuster

    5. Locking device

    6. Spindle

    7. Anvil