ROTRA Ihr Partner für Automation seit 1987RO tation + TRA nslation = AutomationKSSKSS develops and manufactures ball screws and their related products, especially focused on miniature size. The use of miniature ball screws enables a further reductionof the dimensions of complex systems.Ball screws with diameters in a range from 3 mm to 15 mm in different types are available. Standardized ground ball screws:Standardized rolled ball screws:ROTRAYour partner for automation since 1987