Not without compromising the hardness of the ball. It would have to be rehardened after the machining, and that would have to be done by some sort of grinding process, or annealing the ball before machining it to a different radius.
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!