Saturday, 21 November 2015

Measurement Tools

                                                 VERNIER CALIPER

























Vernier calipers are a type of measuring device used to measure precise increments between two points. Vernier calipers work best when used between parallel points, their intended design. Due to their precision they can be used across less stable points of reference to a high degree of accuracy. Calipers come in various sizes, but the most common is 6 inches. These tools are not intended to measure large spans





 MICROMETRE


 A micrometer is a measuring device typically used in machining and mechanical engineering to gauge or determine the precise length of a short object or sample. Also known as a micrometer screw gauge, most types of micrometers are calipers and are used alongside other metrological measuring instruments, such as vernier and dial calipers



DIAL GAUGE


A dial gauge is a precision measurement commonly used to measure machined parts for production tolerances or wear. Dial gauges are capable of producing extremely fine measurement values; increments of 0.00005 inch (0.001mm) may be possible with some gauges. Measurement inputs are transferred to the gauge via a plunger, hinged lever, or the jaws of a vernier. Plunger instruments are generally used in conjunction with a clamp or stand which holds the gauge in a fixed position in relation to the workpiece. The workpiece is then rotated or moved to take the measurements



MULTIMETER


Multimeters are instruments used to test, measure and monitor electrical devices, such as circuits, electrical components or wall outlets. The two types of multimeter are analog and digital, with digital being the most common due to accuracy and ease of use. Analog ones have displays that use moving needles, while digital ones have digital readouts


BORE GAUGE


Bore gauges are used to measure the inner diameter of bores or holes. Most have to be used in conjunction with a micrometer or caliper and, if measurements are performed correctly, can be as accurate as the tool used to measure the gauge. Other models come equipped with a dial indicator to perform measurements themselves. What ever the type of bore gauge used, all use similar simple principles to obtain dimensional readings.


                                                     
FEELER GAUGe


Feeler gauges are used to measure the dimensions of a gap between two objects or surfaces. Feeler gauges are uniform strips of steel or stainless steel with a precise thickness, marked with their thickness dimension. They come individually or as folding progressive sets of gauge blades hinged on the same pivot pin or screw. As the name implies, the blades are individually inserted into the gap being measured and slide back and forth until a slight mechanical resistance is felt as the blade touches both surfaces simultaneously without binding or moving the surfaces away from each other.


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