6600 Wood Hog Horizontal Grinder

Our 6600 Wood Hog horizontal grinder is an aggressive, productive grinder ideal for processing wood waste, land clearing and storm debris into saleable products. The 6600 Wood Hog’s 66″ x 50″ infeed opening processes large material with ease, and engine options up to 1200 HP give you plenty of power.

Morbark Integrated Control Systems (MICS)

Automatically adjusts feed rates and monitors pressures and feed wheel position to maximize production and engine efficiency.


Laser-cut upturn rotor, factory balanced with forged hammers, offers unsurpassed durability and smooth operation.

Externally Adjustable Break-Away Torque Limiter: Optional

Flexible, easily adjustable torque limiter helps protect the driveline and hammermill for damage.

Grate Access

Hydraulic hinged door allows quick and easy access for changing grates.


Length (transport) wheeled: 44′ 11″
Length (operating) wheeled: 68’10”
Height (transport) wheeled: 13’6″
Height (operating) wheeled: 19’3″
Width wheeled: 11’10”

Length (transport) tracked: 44’9″
Length (operating) tracked: 67’1″
Height (transport) tracked: 11’11”
Height (operating) tracked: 18’6″
Width tracked: 11’11”

Gross weight wheeled: 91,440 lbs.
Axle weight: 59,400 lbs.
Tongue weight: 32,000 lbs.

Gross weight tracked: 109,120 lbs.

Engine: CAT
Horsepower:  875 HP to 1200 HP

Fuel capacity (tank) wheeled: 430 gallons
Hydraulic oil capacity wheeled: 238 gallons

Fuel capacity (tank) tracked: 390 gallons
Hydraulic oil capacity tracked: 335 gallons

Brakes: air

Towing arrangement: fifth wheel

Dust suppression system

Hydraulically operated debris containment door

Remote control with tethered back-up system

Infeed System

Infeed opening: 66″ x 50″

Variable speed infeed system consists of one 36″ diameter top compression feed roll with internal drive and a 17’6″ long x 64″ wide live floor equipped with five strands of WDH-120 chain in a staggered configuration.

Hammermill and Grates

42″ x 66-5/8″ hammermill system constructed of heavy-duty 28″ diameter rotor, (18) 1-3/8″ thick two-piece laser-cut rotor plates to ensure precision and enforce steel strength. The plates are keyed on a 9″ diameter shaft with 5-3/16″ bearings and eight 2-½” hammer retaining rods. Hammermill pattern has (18) 2-¼” balanced forged steel hammers, (18) 3-5/8″ wide double-edged replaceable inserts and 18 forged rakers.

Discharge System

Discharge system consists of a hydraulically driven, horizontal 48″ wide x 19′ long aggregate belly belt conveyor discharging onto a 40″ x 31′ stacking conveyor with hydraulic fold for transport.


  • Electric power
  • Automatic reversing fan system
  • Externally adjustable break-away torque limiter
  • Variety of hammermill patterns
  • 14-knife chipper drum assembly
  • Variety of grates sizes available
  • Conveyor with 22-½° swing each way
  • Magnetized end pulley with collecting slide tray for ferrous metal removal
  • 11 HP air compressor with lockable enclosure
  • Quad-axle chassis
  • Hydraulic rod puller
Specifications may vary with equipment options.
Morbark AR450 Grates

Morbark AR450 Grates:
High Performance. Higher Value.

Morbark AR450 Grates give you:

  • Morbark Quality
  • Longer Life
  • Greater Value
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