Nut rotary ball screw is a nut rotary ball screw device that integrates a single nut ball screw with a support bearing. The nut is a steel ball circulation structure using the circulator method, and the steel ball moves along the circulator groove installed inside the nut to the adjacent rolling surface, and then circulates in the load area to carry out an infinite rolling motion. Due to external reasons, when the motor is operating in the low speed range, the torque and speed are prone to unevenness. The motor can be connected independently to the lead screw shaft and the nut of the ball screw, thus keeping the fretting feed within the stable rotation range of the motor
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