#### Ball mill Critical Speed

MORE DETAILS: Technical Notes 8 Grinding R P King. The critical speed of the mill c is defined as the speed at which a single ball will just remain against the wall for a full cycle at the top of the cycle 0 and fc fg 85 mp 2 cdm 2 mpg 86 c 2g dm 12 87 the critical speed is usually expressed in terms of the number of revolutions per second nc c 2 1 2 2g dm 12 298112