Description Overview Cumberland granulator, model 50 3-knife open rotor (was changed from 7-knife rotor) Open rotor design Specifications Approximately 50 in by 25 in feed opening With a bolt-on hopper Has approximately a 25 in diameter cutting circle With (3) rows of (2) bolt-on blades Set up for blower bottom discharge With approximately 1/2 in diameter screen holes Driven by a 100 hp, 3/60/220/440 volt, 1770 rpm motor Mounted on a base