CBI Grizzly Mill Primary Grinder

Grizzly Mill

Known as the heavyweight champion of the wood waste industry, the CBI Grizzly Mill is the backbone of our biomass recovery systems. It is recognized worldwide as the toughest and most productive wood hog ever built. With multiple rotor types and sizes available, it can be configured specifically as a primary, secondary or tertiary grinder for waste wood (stumps, logs, demolition debris, MSW, telephone poles and railroad ties, stringy bark, yard waste, etc.) for end-product sizes ranging from 15mm–500mm.

The Grizzly Mill comes with one of three optional extra heavy-duty, solid steel offset helix rotors with bolt-on strikers that shear material from two different directions against an anvil and grate completely eliminating uneven wear and side-loads on the rotor.

The superior design of our solid steel rotors (available with optional brute package) allows it to turn at half the speed of a conventional hammer-mill’s rotor, saving up to 90 percent of maintenance costs. The rotational speed is fast enough to make a highly uniform end product but slow enough to make the Grizzly Mill extremely tolerant to rock and metal contamination. All rotors are locked to the high strength alloy shaft by two B-Loc locking assemblies.

The Grizzly Mill’s main frame is an extra heavy-duty 1.25” - 1.5” thick wall structure designed to continually withstand extreme peak loads from logs, stumps and all other types of feed material.

The hog box’s clamshell design provides easy access to the anvil, grate and strikers for routine maintenance procedures. All cross members are formed and 100% welded and stress relieved for maximum life and strength. The heavy-duty frame is then line bored to ensure accuracy in alignment and all holes are equipped with replaceable bushings. Wear surfaces are covered with easy-to-replace bolt-on liners made of thick, 450 BHN abrasive resistance alloy.

All the above features are not only incorporated to ensure the toughest, longest lasting, most productive “Hog” ever built; but equally important to have the lowest energy consumption per ton of any wood hog built. The energy savings have been verified and proven again and again, saving our customers tens of thousands of dollars every year.

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