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Universal angle ruler also known as angle gauges, vernier protractor angle ruler and universal, it is the principle of the use of vernier reading to directly measure the angle of the workpiece or a dash of measuring angles. Suitable for machining the inner and outer angle measurement, can be measured exterior angle 0 ° -320 ° and 40 ° -130 ° interior angle. The principle of universal angle ruler and use a universal point scale is used to measure the workpiece, the outer angle is measuring, the structure shown in FIG. Universal angle ruler reading means is made according to the principles of the cursor. Main scale engraved lines per grid of 1 °. Cursor reticle is to take the main scale of 29 ° divided into 30 cells, thus the cursor groove angle grid of 29 ° / 30, namely a main scale and vernier grid difference is, that universal angle ruler reading accuracy 2 /. The reading method is identical with calipers. Measurement should be calibrated to zero, universal angle ruler zero, when Square are fitted with a ruler, and the bottom edge and the base angle square foot in contact with the ruler without a gap, then the main scale and vernier "0" line aligned. After adjusting the zero position, by changing the mutual position of the base scale, angle square, ruler can test any angle within the range of 0-320 °. The application of universal angle ruler measuring the workpiece to an appropriate combination of ruler specifications based on the measured angle: 0-320 Brand: Ha amount as the amount of hardware firms Tianjin Junko Main types of measuring tools, cutting tools, machine tool accessories, low prices, quality assurance , fake a compensable 10, the domestic first-class brand everything, customers are welcome to contact us. National free advice hotline 022-26764635 QQ 1722109911 13820139326 Zhang Changshun official website www.022wj.com