1000 HP Williams Model 680 Reversible Impact Crusher/Hammer Mill. Stock #9549. Used Williams model 680 reversible impact crusher/hammer mill. 1000 HP motor and drive, 3 phase, 60 cycle, 4160 volt, 870 rpm. Rated for 80 tons/hour of raw municipal waste. With Siemens 81H3 controls. Includes unused spare rotor. Location: On Site at Perry ...