Select™ Ball Mills . Drive Ø Diameter EGL Length Installed Power L/D Roller Driven 0,60 m (1,97 ft) 0,90 m (2,95 ft) ... 5,95 m (19,52 ft) 950 kW (1 274 HP) 1,75 Gear Driven 3,60 m (11,81 ft) 5,40 m (17,72 ft) 1 050 kW (1 408 HP) 1,50 Gear Driven 3,60 m (11,81 ft) 6,30 m (20,67 ft) 1 250 kW (1 676 HP) 1,75