Reading manual micrometer

It is easy to read a micrometer if you think of the markings on the Sleeve as dollars and quarters. Now it gets a little easier to read the mike. For example, what are the readings on the micrometers shown below? What is this reading? If you think of the lines on the Sleeve as dollars and quarters, the lines on the Thimble represent "pennies" or cents. We just need some practice. In the picture below, the Sleeve shows 3 dollars and one quarter 25 cents.

Past that there are three additional sub-divisions, which is 3 x. Lastly the graduation 1 on the thimble is the closest to the central long line on the sleeve therefore 1 x 0. The reading thus would be 0. How to Read an Outside Micrometer Graduated in 0. Many micrometers include a vernier scale on the sleeve in addition to the regular graduations. This allows measurements within 0. The additional digit of these micrometers is obtained by finding the line on the sleeve that best coincides with the line on the thimble.

The number of this coinciding vernier line represents the additional digit. The horizontal scale on the sleeve is marked with graduations every. These numbers represents 0. The vertical scale graduations on the thimble represent.

Every 5th graduation is numbered for clarity. The vertical scale graduations on the sleeve represent. This is the vernier scale. Micrometer reading 1. The reading for this example is determined by adding five separate figures. How to read a micrometer graduated in 0. The pitch of the screw thread on a metric spindle is one-half millimeter 0. The number will help. Multiply the reading with the least count of the vernier scale. Obtain the total by adding the reading of the primary scale, the secondary scale, and the vernier scale.

Dial micrometer is an important tool that can be used to measure brake rotor warpage, precision engine building, deck clearances and to measure the distance between two surfaces. A dial micrometer utilizes dial gauge to display the measurement reading. Therefore, the way of dial micrometer works is notably different from the mechanical micrometer.

Similarly, the way to read it is different as well. Reading a dial micrometer is easy. There are some important parts of the dial meter that you have to know first. Reading a micrometer manually is actually very enjoyable, especially once you have been familiar with.

However, it may slow you down. You can turn to the digital model instead, but you still have to learn how to read it because your digital micrometer may run out of power. Reading manually is the emergency way. If you do not know how to do it, it takes time to wait for your new battery arrived. A micrometer with an imperial system and vernier scale Another important thing when reading a micrometer is proper care.

Your Micrometer Unit System Matters As said before, the manufacturers etch the micrometers with either the imperial or metric unit system.

Sleeve Scale. It acts as the main scale. The smallest division represents 0. The biggest division represents 1mm and marked with a long line and numbers positioned on the upper side. Thimble Scale. It acts as the second scale and has 50 equivalent divisions. For one complete revolution, the thimble moves axially 0. Equally, for one-fiftieth revolution one division movement , the spindle moves axially 0.

It is obtained from 0. Vernier Scale. A vernier scale has 10 divisions. Reading the Sleeve Scale Count the exposed divisions that appear on the upper side. Reading the Thimble Scale Look at carefully the index line. Reading the Vernier Scale After obtaining the thimble reading, back again to the sleeve barrel to read the vernier scale.

Final Calculation The final calculation is obtained by adding all the readings of the primary scale, the secondary scale, and the vernier scale. The sleeve scale is divided into 40 equivalent parts that the smallest division is 0. Every four divisions 0. The rest of it is marked with short lines and no number. On the thimble scale, the circumference is divided into 25 equivalent divisions in which each division represents 0.

Nothing changes compared to the vernier scale of imperial scale. Reading the Thimble Scale Secondary Scale Look at the index line that lines up with one of the lines on the thimble scale.