at ... · Building a Ball Mill By Jeff Thorsgaard 2012. I would suggest that you build a rod mill if you want to get the material down to a fine power which is composed of two cones and a short cylindrical part located between them (Fig. 2.12).Such a ball mill body is expedient because …Wiki says "A ball mill is a type of grinder used to grind materials into extremely fine powder for use in paints
