Crusher - WikipediaA crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust. .. In a mobile road operation, these crushed rocks are directly combined with concrete and asphalt which are then deposited on to a road surface. .. VSI crushers use a different approach involving a high speed rotor with wear.rock crusher operating speeds,Maximize your cone crusher productivity | Pit & QuarryApr 28, 2017 . If a crusher is allowed to operate at a wider-than-optimum setting for even . HP Series cone crushers feature a combination of crusher speed, throw, .. be rock-on-rock crushing and grinding taking place in the crushing cavity.
rock crusher operating speeds