Ball Screws for CNC: Easy Guide [Bearing Blocks, and Anti
WEBFeb 9, 2024 · Besides ground versus rolled, ball screws come in different accuracy grades that you should be aware of: C0 – 3um or ″ per 300 mm / 12″. C3 – 7um or ″ per 300 mm / 12″. C5 – 14um or ″ per 300 mm / 12″. This refers to how close the position will be after the screw has turned through 12″ of motion.