IKA Mills Lab mills Grinding mill Crushing. ... Grinding Balls Steel balls ranging from ¾ to 5 in in diameter are used Rods range from 1½ to 4 in in diameter and should be 3 to 4 in shorter than the inside mill length Tube mills are usually fed balls smaller than 2 in whereas 4- or 5-in balls are more commonly used for ball-mill grinding .
