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) 2,2 kW (1 HP) 1,50 Roller Driven 0,80 m (2,62 ft) 1,20 m (3,94 ft) 5,5 kW (7 HP) 1,50 Roller Driven 1,00 m (3,28 ft) 1,50 m (4,92 ft) 11,0 kW (15 HP) 1,50Web