Ball Mill Maintenance & Installation Procedure - 911 MetallurgistAllowable bearing pressure between concrete footings and the soil . We recommend a mixture of 1:2:3 for ball mill and rod mill foundations. . are covered by the foundation plan drawing submitted separately. . the gear should clear the trunnion bearing and pinion bearing piers.drawing of how install cement mill trunnion gb rtd,Retrofits for grinding mills - grinding mill, regardless if it is a current or previous model. . well as automated systems. shell motor trunnion gear guard feed chute inching drive gear trunnion seal . concrete, which can deteriorate over time from movement . accompany the lug fabrication drawings in order to make . Trunnion bearing RTD installation.