Screw tap drive by servo motor .without special drive system inside machine,high precision thread ,avoid bad thread. System can setting tapping torque, with overload protection function. avoid screw tap break . Spindle with decelerate safety device ,structure company ,drive stablilize,deliver big torque. Window type parametric CNC system, only need to fill out relevant parameters to complete different pitch thread processing ,which is simple to operate . Be visible ,displaying the actual work to set torque,the actual thread depth setting thread depth. the machine speed ,the number of qualified tapped screw threads Can control : Can change speed and torsion, can setting depth of the process, choose process model ,can choose backward chip removal, choose lubrication method .