I am in the process of changing my thrust bearings for my Fadal 3016, when I removed the bearings in the X there were NTN 7304B bearings. They where mounted face to face with a shim in between them.
When I removed the Y axis the bearings are different SKF 7304 BECBY and they where mounted back to back with the shim in between bearings.
That struck me as weird, I am guessing at some point the X axis bearings were replaced since if I am not wrong Fadal used SKF but I might be wrong, Also I am unsure on what arrangements the bearings should go, I think they should be the same arrangement on all axis but then again I might be wrong.
Anyone knows what is the correct arrangement for the bearings, is it face to face or back to back? Is it the same orientation for all axis? Thank you!