1100 Tub Grinder

The Morbark 1100 Tub Grinder is a mid-sized grinder that brings price and performance together for the processing and reduction of wood waste. This tub grinder packs an impressive line of features usually only found on larger models, including the Morbark Integrated Control System (MICS) to adjust feed rates of a variety of materials while optimizing fuel efficiency. Other features include a laser-cut, factory-balanced hammermill; dual hydraulic augers that maintain flow during material surges to prevent plugging; and a full breakaway torque limiter to protect the engine and clutch from catastrophic damage.

Hydraulic Augers

Quickly remove product from beneath the mill. During material surges, pressure sensors on the auger system automatically slow tub rotation to prevent plugging.

Torque Limiter

The full breakaway torque limiter system protects the engine and clutch against shock and overload without stalling the engine.

Tub Tilt Feature

Tub Tilt

Provides easy access to grates and anvil for routine maintenance.


Laser-cut, factory-balanced hammermills with forged hammers offer unsurpassed durability and smooth operation.

Morbark Integrated Control Systems (MICS)

Monitor pressures, temperatures, clutch systems, tub rotation and engine efficiency to maximize production and engine efficiency.


Length (operating): 56’3″
Length (transport): 37’2″
Height (transport): 12’9″
Width: 11’2″

Gross weight NCL: 48,630 lbs.
Axle weight NCL: 34,830 lbs.
Tongue weight NCL: 13,770lbs.
Gross weight WCL (optional): 59,920 lbs.
Axle weight WCL (optional): 40,540 lbs.
Tongue weight WCL (optional): 19,380 lbs.

Engine: CAT or John Deere
Horsepower: 500 HP to 700 HP

Fuel capacity: 160 gallons
Hydraulic oil capacity NCL: 120 gallons
Hydraulic oil capacity WCL: 205 gallons


Tub has 9′ diameter at inside base, 62″ deep walls constructed of 3/8″ reinforced steel plate, and floor constructed of 1/2″ thick wear-resistant steel, supported by 14 roller guides carried on 1-1/2″ diameter shafts. Hydraulic full tilt tub for easy access to hammermill, with hydraulically powered variable RPM forward and reverse tub control; MICS (Morbark Integrated Control System) tub controlled with automatic reversing tub, sensor system. Tub cover for debris containment. Morbark Integrated Control System located in the instrument panel.

Hammermill and Screens

24″ x 52″ Hammermill system constructed of heavy-duty 16-1/2″ diameter laser-cut rotor, (13) 1-3/4″ thick 2-piece laser-cut rotor plates to ensure precision and enforce steel strength. The plates are keyed on a 5-7/8″ diameter rotor shaft with 3-15/16″ bearings direct driven at engine RPM and (8) 2″ hammer retaining rods.

Complete with (24) 2″ balanced forged steel hard-surfaced hammers and (24) 2-15/16″ replaceable inserts with nuts and bolts.

1″ thick wear form steel heavy-duty screens

 Discharge System

  • Two 14″ diameter augers discharge onto a 36″ belt conveyor
  • Discharge height: 15′
  • Hydraulic fold for transport
  • Front hydraulic stabilizers and manual outriggers


  • Magnetized end pulley
  • Dust suppression system
  • 300-gallon fuel tank in lieu of 160-gallon fuel tank
  • Morbark reversing fan
  • Variety of screens
  • Air compressor
  • 12′ tub flare
  • Dual hydraulic tub drives
  • Available with cab and loader
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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