In addition to the tailstock type, the valve lathe also has the top function. The standard type and the economic type have the tool holder II as the top function. When the tool holder II is closed for the top function, the tool holder II and the tool holder I have similar functions, and have punching, outer circle (vehicle step), tapping, and car taper. Conventional functions such as slotting, inner hook groove, and flat chamfering.

     In the old version of the system, when the tool holder II is opened as a top in the normal situation, the tool holder II will immediately hold the part after the chuck is tightened, and then enter the other tool holder. After the tool holder is finished, the tool holder II The tip is automatically retracted, and finally the collet release part is automatically taken out of the machine.

     The valve lathe and the new version system can perform the other functions such as center hole, punching, flat head or chamfering before the part of the tool holder II is placed. The tool holder II then enters to hold the part and continue to process the outer circle. , slotting, chamfering, etc., then the top exit, the end face or hole is machined again, and finally the collet release part is automatically taken out of the machine.