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.

Cold Rolling

The friction generated between the rolling dies and the metal round bar,driven by high radial spiral pressure,causes the metal bar to undergo plastic deformation and be forced into the rolling zone.During this process,the external grains of the metal bar experience slip flow along the tooth profile contour of the dies,ultimately achieving the required thread dimensions.This process is known as cold rolling formation.

Turning 
This process utilizes a lathe cutting tool to machine a rotating metal round bar,ultimately obtaining the required thread dimensions as well as end shaft dimensions.

Grinding 
This method employs grinding wheels to abrade the metal round bar to obtain the required threads.It is typically used for screws made of harder materials(such as GCr15,40Cr,etc.)or for triangular thread lead screws.While this method offers high precision,it has relatively low production efficiency.

Choose Pneumatic Clamps for:

• High-speed automation lines (fast cycle times)

• Frequent clamping actions

• Needing strong,reliable holding force

• Cost-effective,high-volume production