YARDBEAST 4.5” Commercial-Grade Chipper – YB4521

The Yardbeast 4521 Commercial Grade Wood Chipper is the ultimate solution for tree care companies and property owners with medium-sized parcels. It is designed to effortlessly handle branches and debris up to 4.5 inches in diameter and is powered by a robust Kohler CH640 Command Pro 20.5HP engine, ensuring top-notch long-term performance.
The rotor is constructed from 3/4” thick steel with two angled blade cradles and 3/8” thick steel vanes. It is dynamically balanced for optimal performance and the heavy-duty construction ensures durability and reliability, even under the most demanding conditions. You can trust the chipper to handle tough jobs without frequent maintenance or breakdowns, saving time and reducing downtime.
The gooseneck discharge chute can be rotated to direct the flow of chips into just about any location, such as the woods, chipper trucks, or pickups. This makes it easy to manage chipped material efficiently and simplifies clean-up.
The YB4521’s commercial-grade clutch is directly coupled to the engine shaft, powering the rotor through a twin belt system providing a smooth and reliable power transfer, while also protecting the engine and drivetrain from sudden shocks. All of this enhances the longevity of the chipper and ensures consistent, powerful performance during heavy-duty use.
The chipper features a mono-chassis trailer with a torsion stub axle, high-speed wide tires, and DOT-approved lighting for highway travel. The trailer also includes a straight tongue coupler with locking chains, a 1,000-lb trailer jack, and a 1-7/8″ ball hitch. Super easy to transport on public roads, ensuring you can take the chipper wherever it’s needed, and increases mobility and convenience, allowing you to provide services over a wider area with ease.
Your investment in the Yardbeast 4521 Commercial Grade Wood Chipper with enhance your productivity and efficiency. Whether you’re managing a tree care business or maintaining a large property, this chipper is engineered to help you work smarter, not harder. Don’t let tough branches and debris slow you down—upgrade to the Yardbeast 4521 and elevate your tree care operations to the next level.
Full Specifications

Chipping capacity: 4.5″
Blade Speed: 3046 RPM
Massive 85 lbs rotor
Blade Dimensions: Dual A8 Tool Steel, 7″ x 3″ x 3/8″
Rotor Construction: 1″ thick steel with 3/8″ rotor vanes
Flywheel: 21.25″
Feed hopper: 30″ x 20″
Discharge at ground floor
Frame: 3/16″ thick steel with welded seams
SKF® roller sealed bearings with custom steel housing
Discharge height: 72″
Kohler CH640 Command Pro 20.5 HP, 429cc engine operates with 3600 RPM & 35.7ft-lbs at peak torque
Displacement: 674cc
2-quart oil capacity
Fuel tank capacity: 6 gallons
CARB Tier III certified emissions
NORAM® Heavy Duty centrifugal clutch
2- Gates® Hi-Power II B63 Belts
Cast Iron 2-groove rotor pulley with 1 3/8″ taper hub
2 – 20.5″ high-speed wheel, 4 spoke
Trailer construction: 1/8″ thick steel, mono-chassis, 68” wide
Suspension: Torsion-stub axle
Rear Axle: Fixed, 1/8″ steel, 21-1/4″ wide
Hitch: 1-7/8″ ball hitch coupler with chain hooks
Trailer: DOT compliant with lighting kit
Crated Dimensions: 74″ x 50″ x 45″
Shipped Weight: **
Weight: 1050 lbs
Warranty: 1-year warranty on the chassis on manufacturer defects, 3 years on Kohler Engine, engine by the manufacturer
SKU: YB4521
YARDBEAST

Owners Manual
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