Label of the Parts

(This image is licienced under GDFL. The source file can be obtained from

Range and Accuracy
The range of a micrometer is
The accuracy of a micrometer is up to

How to Use a Micrometer?
  1. Turn the thimble until the object is gripped gently between the anvil and spindle.
  2. Turn the ratchet knob until a "click" sound is heard. This is to prevent exerting too much pressure on the object measured.
  3. Take the reading.
Youtube Video

How to Read the Reading?

Reading = Reading of main scale + Reading of thimble scale.

Reading of main scale = 0 - 25 mm
Reading of thimble scale = 0 - 0.49mm

(This image is licensed under GDFL. The source file can be obtained from
Reading of main scale = 5.5mm
Reading of thimble scale = 0.28mm

Actual Reading = 5.5mm + 0.28mm = 5.78mm

Youtube Video

Precaution Steps
  1. The spindle and anvil are cleaned with a tissue or cloth, so that any dirt present will not be measured.
  2. The thimble must be tightened until the first click is heard.
  3. The zero error is recorded.
Interactive Animation
SHAW : micrometer (Java Applet)

External Link
The Micrometer -

External Link

Interactive Animation


  1. ariyana // April 5, 2009 at 11:27 PM  

    we need more information and more example.explain more about how to use micrometer screw gauge.

  2. ★ rabbitö ★ // May 18, 2009 at 4:35 AM  

    Nice, simple but brief explanation about the micrometer screw gauge oo~ :3

  3. Ailurophiles // September 30, 2009 at 9:13 AM  

    i think the measurement is wrong.

  4. Unknown // March 17, 2010 at 1:16 AM  

    what is the functio of timble?

  5. HaR!Z // February 23, 2016 at 8:24 AM  


  6. Dian Ainurrafik Afnan Sabili // November 14, 2021 at 1:51 AM