Tapping machines are specialized machine tools used for machining internal threads in pre-drilled or pre-fabricated holes. Their core working principle involves using a rotating and axially feeding tap to cut precise thread grooves into the hole wall. Based on the level of automation, tapping machines can be classified into manual, semi-automatic, and fully automatic models; and based on the spindle direction, they can be vertical or horizontal. Compared to manual tapping, tapping machines offer precise control over rotational speed, feed rate, and torque, ensuring thread accuracy, consistency, and effectively preventing tap breakage. They are particularly suitable for high-efficiency and high-quality internal thread machining of mass-produced parts (such as flanges, housings, and mold inserts). Modern CNC tapping machines can even be integrated into machining centers or flexible production lines to automate complex processes.