... China. We design and produce our own rolling tools, and we can produce all kinds of screws ... 4005,4010,4020,5005,5010,6310, the max length 6000mm, we sugguest customer accept 3000mm, it's ... equipments manufacturing rolled ball screws and nuts, including precision grinding, heat treatment, CNC machining etc. Step 3 ... China. We design and produce our own rolling tools, and we can produce all kinds of screws ...