A ball mill is a grinding machine used to grind, blend, and sometimes for mixing of materials for use in geology, ceramics, metallurgy, electronics, pharmacy, construction material, and light industry, etc. ball mills are classified as attritor, planetary ball mill, high energy ball mill, horizontal ball mill, or shaker.Ball end mill re-sharpening machine. ... portable 3-13mm end mill grinder grinding machine sharpener with 5 collets y. $630.29. free shipping. sharpening fixture spindle possible weldon endmill end mill fixture part. $59.99. $10.34 shipping. weldon endmill sharpening sliding air fixture spindle w/ sub-base..