Non-benz question about hub bearing

[boneheaddoctor]

Question for the mechanics out there

I have a question just replaced a hub bearing on my honda a few weeks back......brand new bearing.....had machine shop press new one in......tonight I heard a thunk when I drove slow over rough stretch of road.........jack car up a few minutes ago adn that same bearing is shot again...15" wheel has about 1/2" wobble at the tread, not loose lugs....the whole hub is moving around from bearing apparently self destructing ....last time it was the outer side that went....assume its outer side again. Caliper is not sticking and bearing required no shims to replace....there is in effect nothing that preloads it.

THe bearing is a big and beefy one about 2 inches wide really a double ball earing on a common outer race. Any ideas what could cause a failure so soon?