Self-tapping screws are mostly used for the connection between thin metal plates (steel plates, saw plates, etc.). When connecting, first make a threaded bottom hole for the connected piece, and then screw the self-tapping screw into the threaded bottom hole of the connected piece. Since the threade... read more
1. Screws: It is also a type of fasteners composed of two parts, a head and a screw, which can be divided into three categories according to the purpose-machine screws, set screws and special purpose screws. The machine screw is mainly used for the fastening connection between a part with an interna... read more
After driving the self-drilling and self-tapping screw into the hole on the ground or wall, use a wrench to tighten the nut on the self-drilling and self-tapping screw. The screw goes out, but the outer metal sleeve does not move, so the big end under the screw is Expand the metal sleeve so that it ... read more
As we all know, there are many main factors that affect the carburizing process of locking self-tapping screws, such as temperature and time. When the screw material, carburizing temperature and carbon potential are determined, the carburizing time will be determined according to the depth of the ca... read more
(l) Take measures from the sharpening of the drill bit to overcome the phenomenon of drilling deviation. To shorten the chisel edge, make the edge shape of the drill well centered, and form a turning point on the main cutting edge, which is conducive to chip separation and chip breaking. Increase th... read more
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