Tolok Skru Mikrometer

Label dan Bahagian Label of the Parts
(This image is licienced under GDFL. The source file can be obtained from wikipedia.org)


Julat dan Kepekaan

  1. Julat mikrometer ialah 0-25mm.
  2. Kepekaan  suatu mikrometer ialah 0.01mm.

Teknik Mengguna Mikrometer

  1. Memutarkan bidal sehingga objek yang diukur dipegang dengan tidak terlalu kuat oleh anvil dan spindal.
  2. Selepas itu, racet diputarkan sehingga bunyi "klik" didengari. Ini adalah untuk mengelakan tekanan yang terlalu kuat dikenakan ke atas objek diukur.
  3. Baca bacaan mikrometer.

English Notes:

Range and Accuracy

  1. The range of a micrometer is 0-25mm.
  2. The accuracy of a micrometer is up to 0.01mm.

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


Bagaimana Membaca Bacaan Mikrometer?

Bacaan = Bacaan skala utama + Bacaan skala bidal.

Julat bacaan skala utama = 0 - 25 mm
Julat bacaan skala bidal = 0 - 0.49mm

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

Contoh


This image is licensed under GDFL. The source file can be obtained from wikipedia.org.)

Bacaan skala utama = 5.5mm
Bacaan skala bidal = 0.28mm

Bacaan sebenar = 5.5mm + 0.28mm = 5.78mm

Reading of main scale = 5.5mm
Reading of thimble scale = 0.28mm

Actual Reading = 5.5mm + 0.28mm = 5.78mm

Youtube Video


Langkah berjaga-jaga

  1. Anvil dan spindal dibersihan dengan kertas tisu atau kain supaya tiada kekotoran di atasnya mempengaruhi bacaan.
  2. Bidal dirapatkan sehingga bunyi "klik" pertama kali didengari.
  3. Ralat sifar mesti ditentukan dan dihapuskan semasa memcatat bacaan.

English Notes:

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 - Upscale.Utoronto.ca