What is the principle of the screw

Trapezoidal screw is the most commonly used transmission element in various types of precision machinery, its main function is to convert rotary motion into linear motion, or torque into axial repetitive force, both high precision, reversibility and high efficiency features. Widely used in semiconductor, precision machine tools, woodworking machinery, power tools, sports equipment, medical machinery, food machinery, optical instruments, automation equipment, printing machinery, automotive manufacturing equipment, laser engraving, woodworking machinery, electronics industry, paper machinery, positioning and carrying devices, transportation (manufacturing and transport) devices, packaging machinery and other industries.