critical speed for a ball mill - drupalcity A Ball Mill Critical Speed (actually ball, rod, AG or SAG) is the speed at which the centrifugal forces equal gravitational forces at the mill shell's inside ... Mill Speed - Critical Speed - Paul O. Abbe. concrete wet ball mill speed - jefflebobasketballcamp Aug 04, 2018· Ball mill Wikipedia. A ball mill is a type of grinder used to grind and blend materials for use in mineral dressing . The grinding works on the principle of critical speed. . and it is widely used in production lines for powders such as cement, silicates, refractory material, . Homemade ball mill - Tools and Tooling - Forum You'd probably want to run at 'optimum speed' for dry powders, which is about 65% of critical speed. With the diameter of your media (1/2" balls ?) and the INTERIOR diameter of your mill jar, you can calculate the critical speed required, and the by multiplying this by 0.65, you'd arrive at a reasonably optimum speed.    Read More