The core of ball screw manufacturing lies in the production of the raceway.The threads of the ballnut are produced using grinding technology,while the ball screw shaft can be manufactured using either grinding or rolling processes.Rolling is a cold-working process using molds,with high automation,suitable for mass production,low cost,but lower precision,typically C7 grade or above;grinding,on the other hand,involves a lengthy process from heat treatment,rough machining(turning),to precision grinding(grinding),with lower efficiency but higher precision,typically C7 grade or below,and can achieve C0 grade.