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The spiral micrometer is divided into two types: a mechanical micrometer and an electronic micrometer. 1 mechanical micrometer. Referred to as the micrometer, it is a hand-held universal length measuring tool that uses the principle of precision thread vice. In 1848, France's J, L, and Palmer patented the outer diameter micrometer. In 1869, J, R, Brown, L, and Sharp of the United States made an outer diameter micrometer for measuring the outer diameter of the wire and the thickness of the plate. There are many varieties of micrometers. Micrometers for different purposes can be made by changing the micrometer measuring surface shape and the ruler, such as a micrometer for measuring the inner diameter, the thread diameter, the gear common normal or the depth. 2 electronic micrometers. Also known as the digital micrometer, the grating length measurement technology and integrated circuit are applied in the measurement system. Electronic micrometers were introduced in the mid-1970s for OD measurements.
Classification introduction 1, cursor reading outer diameter micrometer for ordinary outer diameter measurement
2, small head outer diameter micrometer is suitable for measuring timepiece precision parts
3, pointed outer diameter micrometer Its structural characteristics are the two measuring surface is 45 ° cone-shaped tip. It is suitable for measuring small grooves such as drills, upright milling cutters, groove diameters of even-numbered groove taps, and diameters of the root diameter of clock gears.
4. The wall thickness micrometer is characterized by a spherical measuring surface and a flat side measuring surface and a special shape of the ruler, which is suitable for measuring the outer diameter micrometer of the wall thickness of the pipe.
5, plate thickness micrometer thickness micrometer refers to the spherical side of the side of the flat side of the two sides and a special shape of the ruler, suitable for measuring the thickness of the sheet of the outer diameter micrometer.
6. With the micrometer micrometer, its structural feature is that the micrometer is used to replace the fixed anvil of the ordinary outer diameter micrometer. It is convenient to sort and sort the workpieces of the same size, and the indication value is relatively stable. The measurement range is 0-25mm, 25-50mm, 50-75mm and 75-100mm. It is mainly used for size comparison measurements.
7. The large flat side micrometer has a large measuring surface diameter (12, 5mm) and can be replaced, so the pressure between the measuring surface and the workpiece to be tested is small. Suitable for measuring the thickness of elastic or soft metal parts such as metal po foil, rubber and paper.
8. The large-size micrometer is characterized by the ability to change the anvil or adjust the measuring bar, which is beneficial for reducing the number of micrometers and expanding the use range of the micrometer.
9. Flip-type reading outer diameter micrometer has a small window on the differential cylinder, showing 0, 1mm reading 10, electronic digital display type outer diameter micrometer refers to the use of electronic measurement, digital display and spiral sub-principle to measure two on the ruler The distance separating the faces is the outer diameter micrometer for reading.
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Tag: spiral micrometer plate thickness outer diameter micrometer medium diameter flat side
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