Steps: To obtain the first part of the measurement: Look at the image above, you will see a number 5 to the immediate left of the thimble. Therefore, the measurement in the image is 7.14 mm. This one measures to the nearest .01 mm. If there is an additional line uncovered on the top row, this is equal to one-half a millimeter (Figure 3). The Vernier scale reading is 0.58mm, because that is where the Vernier scale aligns with fixed scale values. The barrel gauge is abbreviates so that "28" equals 0.28 mm. Remember that even a slight slip of the thimble can disrupt the measurement. So 0.5 mm would need to be added to the measurement. Vernier type Micrometer gives the highest acceptable accuracy of 1 micron such gauge is vernier type micrometer. Therefore, itâs very recommended turning adequately the lock nut to lock the spindle and prevent it moves before taking the reading. A micrometer is used to take very precise measurements. How to Measure With Micrometer: A micrometer is an essential tool for taking precise measurements. The combined reading is 3.58mm. It says so right here (click the picture for a better viewâ¦. There are different kinds (inside, outside, depth, inch), just look it up on Wikipedia. The fixed scale reading is 3.0mm because the "0" on the Vernier scale is pointing between the "3" and the "4." When a pair of calipers just isnât accurate enough (i.e. In the photo, the micrometer has an accuracy of 0.02mm. There are a variety of micrometers in the market from simple ones like the Mitutoyo on above to ones with Read the linear gauge, which is in millimeters, and then read the barrel gauge. The barrel gauge will be divided into increments depending on the step size of the linear gauge. These are the whole millimeters. Vernier micrometer. To read the metric micrometer, first read the number of whole millimeters on the bottom row of the sleeve of the micrometer (Figure 3). Combine the two readings. Micrometer Free Preview External/Outside Micrometer . It has a precision of 0.01 mm and if you ever aspire to make something with tight tolerance you will probably need to use it. The above image shows a typical micrometer screw gauge and how to read it. Micrometer Reading, Use, and Measurement. This means 5.0 mm. Notice that there is an extra line below the datum line, this represents an additional 0.5 mm. 7mm + 0.14mm = 7.14 mm. Micrometer: To read either a .001" or .0001" micrometer, you place the material to be measured between the anvil and spindle, and then turn the ratchet until the spindle closes down and stops moving. need to measure a tolerance that is less than 0.002â³), most machinists will turn to a Micrometer Reading. In order to increase accuracy, the vernier principle also is applied to an outside micrometer. This type of micrometer can be read by 0.001 mm ⦠The lengths of extension rod and collar are added to the micrometer reading. For metric micrometers that use millimeters in half-step increments, the barrel gauge will have 50 increments. Tip: If the half mm increment is showing on the primary scale, add 0.5mm to the total reading. Micrometers come in digital, dial, and vernier styles, much like calipers: Mitutoyo Digital Micrometer⦠It is used to check the outside diameter of the circle by the means of the accuracy of 0.01 mm or up to 0.001 mm. The micrometer is then removed and reading is taken. We will have a look at how to use a traditional analog m⦠Lastly, you can get rid of the object, read the micrometer, and note the measurement if needed. But here I have a metric one. Then you read the markings on the sleeve and thimble. In the case of a .0001" micrometer you would 3 ) type of micrometer can be read by 0.001 mm ⦠micrometer reading 0.001. 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