The DFU Series (DIN 69051 Form B) is a precision ball screw with a double nut, flange-type design, offering high rigidity and load capacity . The double nut construction enables preload adjustment to eliminate backlash and enhance positioning accuracy . Featuring an internal ball recirculation system, it ensures low friction, smooth motion, and reduced wear . Available in diameters from 16mm to 100mm and leads from 4mm to 20mm, it can achieve C3 to C7 precision grades . Common applications include CNC machine tools, robots, and automation equipment.