damasta105

Hi all,
I think this applies to chemistry as it is a process needed for the chemicals of BP...
But why are all ball mills designed the same way? They all work on the principle of a barrel rotating on rollers, why are no ball mills (that I have seen) designed to have the barrel rotating on an axis with a motor at the end, wouldnt this require a much smaller motor and obtain more efficiency as there would be negligeble power lost by friction to the rollers.
Would there be any problem with an axis running right through the mixing barrel?
If there is I suppose it could have 2 bolts out of each end (brass bolts of course!) so there is no axis in the barrel itself.
I was just wondering as it would significantly decrease the cost of such a machine and be more efficient? But I also posted as to ask about any flaws in the design, surely if it was good it would be used often in ball mill designs.

Rory.