Thanks 3x10e6. I had to come back to this board to comment on what great information you are sharing with us. This is what this board is all about. When it comes to rod mills & ball mills, this is an area of my expertise. I am familiar with lead times and have installed both, as well as done maintainence on them, such as replacing bearings, wear plates etc. Ball mills and rod mills are used extensively in my area of the country for the processing of iron ore and limestone found in open pit mining and quarries. Just wanted to shed a little light on this subject !!