A:Internal Screw Thread Machine The tai-wagging internal screw rolling machine is the domestic
relatively advanced equipment, it superior advantage is
simultaneously rolling the internal screw and drawing the external
diameter of the tube. The steel balls of the through automatic
internal screw machine are acted by the adapter sleeve, move
forward under the cylinder pushing force; and the shifting yoke
reversely pushes the adapter sleeve forward, the steel balls move
to the center, to extrude the tube external diameter and form the
internal screw; and the ideal dimension is drawn by the external
drawing module. With the pneumatic and hydraulic devices, the
automatization level of this equipment is at the absolute leading
position in China.