ILA 24/12/2009 14:00:41 Grinding balls Kindly, what the deferance between forged and cast grinding balls and what the applications that two kinds serve and why ?? Warm thanks Michael Clark 30/12/2009 10:08:23 The difference is the hardness. Forged is harder than cast and therefore the wear rate is lower and they last longer. However they are more expensive. Both are used as the media for raw and cement grinding.