The reduction ratio for a jaw crusher is typically 6to1, although it can ..... crusher gap setting with automatic zeropoint calculation can speed... More details » Get Price Crushing of coal and calculation of size reduction efficiency.
Jaw and gyratory crushers are used mostly for primary crushing. They are characterized by wide gape and narrow discharge and are designed to handle large quantities of material. The capacity of the crusher is determined by its size. The gape determines the maximum size of material that can be accepted. Maximum size that can be accepted into the crusher is approximately 80% of the gape.