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Screwdriver

Time : 2015-02-26 17:24Source :analogtechnologies Author : Analog Click :
A screwdriver is used to turn the screws and force them in the place. There is usually a thin wedge head, which can be inserted into the screw head slot or recess. The screwdriver shape is mainly divided intwo types:slotted screwdriver and cross screwdriver. The six angle screwdriver is also very common, whichincludes inner six anglescrewdriver and outersix corner screwdriver.

Cross screw and cross screwdriver are both invented by Henry Philips in last century. They are first used in the assembly line of the car. In order to apply an appropriate torque to the screw, people thought of opening a groove on the screw head, and used the screwdriver to tighten or loosen the screw conveniently. However, with the rapid development of science and technology, the application of screws is more and more wide, and the shortages of screws and slotted screwdriver also show out. If the slotted groove of the screwhead is destroyed, it cannot betwisted out. And if the length of the groove is longer, it will be easier to be destroyed in the process of being twisted. In order to shorten the length of the notch, improve the ability to resist destruction of the groove, and deliver the same size of the torque, people think of using cross slot, which can bear the same torque.The result isthatthe groovelength is shortened and the ability to resist destruction is also greatly strengthened. The slotted screwdriver cannot be used for cross recess screws. Then people produce the cross screwdrivers for the cross recess screws. So there are two kinds of screwdriver.