How to Read a Micrometer Scale?
2 Answers
Reading steps for a micrometer are as follows: Read the scale on the fixed sleeve corresponding to the left end face line of the movable sleeve; Align one of the scale lines on the movable sleeve with the zero reference line on the fixed sleeve and read the scale; Add the readings of the above two scales. Below is a detailed introduction to micrometers: Brief Description: A micrometer, also known as a screw gauge, screw micrometer, or micrometer caliper, is a more precise tool for measuring length compared to a vernier caliper. It can measure lengths accurately up to 0.01mm, with a measurement range of several centimeters. Classification of Micrometers: Micrometers can be divided into mechanical micrometers, electronic micrometers, vernier reading outside micrometers, small head outside micrometers, pointed head outside micrometers, wall thickness micrometers, sheet thickness micrometers, and micrometers with a micro head to be measured, among others.
I recently started learning how to use a micrometer, and my teacher taught me a simple method: first, look at the scale on the fixed sleeve, which represents the whole number part. For example, if 5 mm is visible, then check if the half-millimeter line is exposed. If it is, add 0.5 mm, making it 5.5 mm. Next, observe the scale on the movable sleeve, where each small division represents 0.01 mm. For instance, if it points to the 18th division, that’s 0.18 mm. Don’t forget to estimate the last decimal place by looking horizontally at the position of the movable sleeve between two lines. I often estimate to the thousandth place—for example, if it’s one-third to the right between the 17th and 18th divisions, I’d read it as 0.175 mm. Finally, add the whole number and decimal parts together—for example, 5.5 mm plus 0.175 mm equals 5.675 mm. With a bit of practice, you’ll get the hang of it.
