Now look at the large 2 and notice that the vernier line of 13 is to the LEFT.On the bottom left, the blade of the hatchet are the jaws of the caliper for measuring outside dimensions - think of a tube.
![]() That will measure the depth of a step or some other similar feature. That little button on the top near the pike is a locking screw. Read Vernier Caliper Download Step 1Add Tip Ask Question Comment Download Step 1: Holding the Caliper This is the proper way to hold a caliper. Use the locking screw at the top if you want to set a dimension on the caliper and then check parts against your setting. Though it may not look it, the measurement between the inside and outside jaws are EXACTLY the same. Add Tip Ask Question Comment Download Step 2: Course Reading 1 So lets read a measurement off of the caliper. Whole numbers (1,2,3, etc.) are followed by a decimal point and an endless number of zeros (2.000000). We are going to be working with the 3 places to the right of the decimal point. The first number to the right of the decimal point is a tenth of an inch (110), the second number signifies a hundreth of an inch (1100), and the third number signifies a thousanth of an inch (11000). A human hair is about 3 thousands of an inch (0.003), give or take a thousanth. This number (0.456) is read as four hundred and fifty-six thousands. If you noticed, the handle of the caliper has a scale that starts from zero on the left and goes up to 6 inches on the right, in this case. The big number in the center of the scale is the inch number. In this case we are looking mostly at the area AFTER the first inch mark on the left, and then we see the number 2 on the right, which indicates the second full inch. ![]() That makes each one of those lengths 110 of an inch (0.100). And then each amount of space between each 110 of an inch has 3 lines - which breaks each 110 of an inch into 4 equal pieces. Each one of those little pieces, therefore, is twenty-five thousanths of an inch (0.025) long. Theres also a scale on the bottom of the picture. Notice that the line for the 0 (zero) is to the right of the second line after the number 3. ![]() The 3 is to the left of the zero on the vernier, so well add that to our number (1.3). The zero line is to the right, of the second line after the 3. So there is at least fifty thousanths there (0.050), but theres more. Notice how the zero line is just a smidge to the right of that second line after the 3.
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