Do not clamp the micrometer tightly on to the workpiece. Step3: Rotate the ratchet stop until the spindle contacts the item. Make sure the micrometer is perpendicular to the surfaces being measured. Step2: Slightly place the item to be measured against the anvil of the digital micrometer. Step1: Carefully open the jaws of the digital outside micrometer by revolving the ratchet. You have to keep them dry and clean all the time. (Here we choose the mm version.)Īt any time, do not touch the measuring surface of both the micrometer and the item with your hands, because the sweat on your hands will cause inaccuracy to the measurement. Step8: Turn on the mm/in button of the digital outside micrometer and then choose the desired unit system as you like. If it doesn’t read 0, adjust the thimble and the ratchet stop until it reads o. If it reads 0 and you can begin to take the measurement. Step7: Turn on the ON/OFF button of the digital outside micrometer. For example, you need to use the 25mm calibrated rod to calibrate the 25-to-50-mm digital outside micrometer. If you use the 25-to-50-mm, 50-to-75-mm or micrometers with larger range, you would need to use the corresponding calibrated rod to calibrate them before measuring. Step6: Turn the thimble to make sure the 0 line align with the centre long line on the sleeve completely. Step5: Fully close the digital outside micrometer gently. Step4: Dry and clean the measuring surface of the spindle of the digital outside micrometer with clean cloth (or soaked with cleaning oil). Step3: Dry and clean the measuring surface of the anvil of the digital outside micrometer with clean cloth (or soaked with cleaning oil). Step2: Dry and clean the cover of the digital outside micrometer with clean cloth (or soaked with cleaning oil) Step1: Dry and clean the measuring surface of the item to be measured with clean cloth (or soaked with cleaning oil) Usually, there is the 0-to-25-mm (0-to1-inch), 25-to-50-mm (1-to 2-inch), 50-to-75-mm (2-to 3-inch), and 75-to-100-mm (3-to 4- inch) micrometers.īelow are the proper procedures for using a 0-to-25-mm (0-to1-inch) digital outside micrometer right: Digital micrometers are available in a large amount of different sizes. A digital micrometer consists of the frame, anvil, spindle, lock nut, sleeve, sleeve numbers, sleeve long line, thimble marks, thimble, and ratchet stop, LCD display, data output port, mm/in conversion key, and the ON/OFF ZERO key. How to read the digital micrometer correctly?ĭigital micrometers are used to measure the length, diameter, or thickness dimensions.
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