Table Approximate capacities of jaw crushers in tonnes/hr. The size designation used here is the traditional one in which the feed opening is specified as gape × length in inches. Size Feed opening Max rpm of flywheel Motor kW Openside setting mm 25 32 38 51 63 76 102 127 152 10×20 300 15 23 31 10×24 275 11 20 23 30