· Since the selected crusher capacity must be in excess of 143 tons per hour, the next higher figure (159) is chosen. The 159 indies a 548 crusher size with 1″ eccentric throw. With 1in. eccentric throw, the motor hp allowed on the crusher is a maximum of 125. However, since only hp is required for this average material, a 100hp motor is sufficient. Fig. 2, taken from manufacturer ...