... material to be ground. The rotation is usually between 4 to 20 revolutions per minute, depending upon the diameter ... Mill Application:are generally used to grind material 1/4 inch and finer, down to the particle size of ... is widely used in building material, and chemical industry.4) There are two ways of grinding: the dry way ... 5224.61200×2400323.8≤250.075-0.61.5-4.84512.51200×3000325≤250.075-0.41.6-54512 ...