Combination Square Set Protractor 180 Degrees With Angle Finder Ruler Measuring

Features: -Universal point scale is used to measure the workpiece, the outer angle measuring tools, its structure as shown in FIG. -Universal angle ruler reading mechanism is based on the principle of the cursor made. Main scale engraved lines per grid of 1 °. The cursor is to take the main scale engraved lines of 29 ° divided into 30 cells, so the cursor groove angle grid of 29 ° / 30, ie, a main scale and the cursor the grid difference is, that universal angle ruler reading accuracy 2 '. The reading method is the same vernier caliper. Reading Method: -First read the travel angle is labeled the zero line several times before, and then read from the cursor point of view "minute" value is the sum of the two parts of the measured angle values. In the universal point of view, it is fixed to the base ruler ruler seat, angle block is fixed in the card sector plate, movable foot is fixed on the -Square card block. If you remove the Square, the ruler can also be fixed on the fan board. Since Square and ruler can move and replace them, so omnipotent ruler can measure the angle 0 & ordm; ~ 320 & ordm; any angle. -When Square and ruler fully armored, the measure 0 & ordm; ~ outside angle 50, only loaded when the ruler, measure 50 & ordm; ~ 140 & ordm; angle, only installed Square, the measure 140 & ordm; ~ 230 'of angle, when the ruler Square and the whole removed, measure 230 & ordm; ~ 320 & ordm; angle (you can measure 40 & ordm; ~ 130 & ordm; inner angle). -Wan Energy Square ruler seat reticle basic angle of only 0 ~ 90 & ordm ;, if the part angle measurement is greater than 90 & ordm ;, at the time of reading, should be added to a base (90 & ordm ;; 180 & ordm ;; 270 & ordm ;;). As part angle:> 90 & ordm; ~ 180 & ordm ;, measured angle = 90 & ordm; + volume Square readings,> 180 & ordm; ~ 270 & ordm ;, measured angle = 180 & ordm; + volume Square readings,> 270 & ordm; ~ 320 & ordm; measured angle = 270 & ordm; + Square amount of reading. -With a universal angle rule

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