![]() This (28mm) must be added with decimal reading on the vernier scale.Here, zero of the vernier scale immediately preceding 28mm.Note the main scale reading, immediately preceding the zero line on the vernier scale.The difference between one division on the main scale and one division on the metric vernier scale is 1/50 or 0.02 mm which is the Least Count. Each division is 49/50, which is equal to 0.98 mm. The metric Vernier scale is 49 mm long and divided into 50 equal parts. How to measure vernier caliper Vernier Caliper ReadingĮach division on the main scale is 1mm. Vernier Caliper How to Use and Application Least count = ( smallest division on main scale) / ( total no. here in this case, 1 mm is one division value divided by 50 numbers which is the total count of vernier scale line = 0.02 mm. this can be calculated by the smallest division value on the main scale in mm divided by the total number of divisions on the main scale. Least count is nothing but the smallest possible value that can be measured using instruments. The human eye can easily detect this alignment of lines which is the main fact that drives a vernier. The vernier scale works on the principle of using the alignment of line segments displaced by a small amount to make fine measurements. lock screw is used for locking a vernier scale moving body. internal jaws are used for internal dimensions measurement like washer ID, grove, slot, cutout pocket dimension, the stem is used for depth measurement or height measurement. Other parts of vernier calipers are external jaws – these jaws are used for measuring external dimensions. Usually vernier calipers have both imperial (inches) and metric (mm) scales. The VERNIER is a small movable graduated scale for obtaining fractional parts of subdivisions on a fixed main scale of any measuring instrument. The vernier scale is attached to the main scale which can slide on it and has 50 divisions on it. The main scale has the normal resolution with a 1 division value is 1 mm. vernier caliper how to use, parts, least countĪ vernier scale has a main scale and a vernier scale. The lock screw secures the jaws into place, so the object you are measuring can be removed, and readings are taken. It helps the user to get a tight grip on the material they are measuring. The thumbscrew is used to precisely adjust the measuring faces of the caliper (both sets of jaws and the depth rod). Each increment has a length of 0.001 inch. ![]() On an imperial caliper with a main scale of 6 inches, the vernier scale is 0.6 inches long and is divided into 25 parts. The measuring range of the vernier scale is usually 1 mm, with each increment representing 0.02 mm. The metric vernier scale is divided into 50 equal parts. On the vernier scale, the smallest increment on the main scale is further divided. The vernier scale adds an extra degree of accuracy to measurements. On an imperial vernier caliper, the main scale is graduated in inches, with each inch divided into increments of a tenth of an inch (0.1 inch). On a metric vernier caliper, the main scale is graduated in centimeters (cm) and millimeters (mm). The main scale runs along the beam of the caliper. It protrudes when the thumbscrew is turned. The depth rod is used for measuring the depth of holes. The lower jaws are used for measuring outside dimensions such as width, length, and diameter. The upper jaws of a caliper are used for taking inside measurements such as the diameter of a hole or slot.
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