On a wheel balancer- - - - -just like any other rotating part. Find the heavy spot and file/grind/drill metal away a little at a time. A pretty good static balance can be done with a piece of all-thread rod suspended on a set of V blocks and some ball bearings lubed with lightweight machine oil. I balance motorcycle tire/wheel assemblies that way. On two occasions I can remember, I've had to discard a brand new drum that was too far out of balance to be corrected.
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!