Standard Bond Ball Mill Grindability Test Method Procedure· BOND BALL MILL GRINDABILITY LABORATORY PROCEDURE Prepare sample to 6 mesh by stage crushing and screening Determine Screen Analysis Determine Bulk Density Lbs/Ft 3 Calculate weight of material charge Material Charge gms = Bulk Density Lbs/Ft 3 x 700 cc/ Lbs/Ft 3 Material charge = Bulk Wt gm/lit x 700 cc/1000 Calculate IPP