The redesigned Model 1300B tub grinder offers a larger screening area and a longer rotor to better utilize the available horsepower for increased production rates. A roomier, redesigned operator's cab includes a larger curbside window, new heating/cooling ducting, new wiring ducting and improved ergonomic joystick controls, resulting in greater visibility, increased operator comfort and less operator fatigue. The standard Iqan variable feed and digital monitoring system reads engine rpm and adjusts tub rotation accordingly to ensure a consistent feed to the hammermill. Caterpillar or Cummins diesel engines are available from 875 to 1,000 hp. The unit comes with or without a loader, and is offered in a track version.