Dave, Can / must your spindle shaft be solid? You could cool your spindle bearings with air or liquid cooling thru a hollow spindle unless you must "swallow" the workpiece. As far as bearing type, angular contact and tapered roller bearings can absorb axial and radial forces to varying degrees. Don't forget seperate radial and axial bearings, they function well also.
You appear to be starting with blank paper, don't rule anything out.
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DZASTR |