Turning a ball on a latheJan 19, 2011 . This is a video of using a home made ball turning tool on a lathe. . milling machine so it mills a circle on the shaft you wish to have a ball, then.machining a ball,Ball mill - WikipediaA ball mill is a type of grinder used to grind and blend materials for use in mineral dressing . For systems with multiple components, ball milling has been shown to be effective in increasing solid-state chemical reactivity. Additionally, ball.