I don't know what others experience with these hubs are but they should last more than 3 months of road biking, got it new of ebay. Can an uneven chainring bend an axel if the chaintension gets to high? Thats the only thing I could imagine would have done it on my bike.
Anyways, I appreciate all the help I got. I orderd the bearing puller and singlespeedshop.de says that the "Surly axel kit " whích includes cones and nuts will work with the Miche hub. We'll see in a few weeks. With all the money spent on tools, parts and international shipping I've could have bought 1 1/2 new hub!