Hub/drum combinations need to be mounted on the drum lathe spindle with "radius cones" that use the bearing races as centering points. That also applies to disc brake rotors with integral bearing races. If the guy running the machine doesn't know that, RUN do not walk away!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!