Powered by the proprietary Unimax Integrated Control System, WD4000 Tub Grinder monitors all key systems to optimize performance. Remote control enables instant feed system tweaks, maintaining peak throughput and excellent fuel economy. Boasting outstanding power and efficiency, the Unimax WD4000 tub grinder is perfectly suited for large-scale land clearing and heavy waste processing jobs.
● Rotor diameter: 700mm
● Diameter of feeding disk: 4000 mm
● Engine power: 550 HP
● Production capacity: 40-50 Tons Per Hour
● Max material diameter: 2400 mm
● Out put size: 50-100 mm
The Unimax WD4000 tub grinder stands out as a top-tier and high-productivity crusher, designed with remarkable versatility. It is particularly well-suited for handling diverse batches of straw crushing tasks or wood crushing operations. One of its distinct advantages is flexible installation. The WD4000 tub grinder can be mounted on the ground or installed on trucks to carry out crushing operations. It features convenient setup and excellent cost-effectiveness, allowing for stable and flexible deployment during field operations, which significantly enhances its usability in different work environments.
This robust WD4000 is engineered with an eye – catching 2.4 – meter tub diameter and a 4– meter tub opening. These dimensions not only contribute to its large – capacity processing ability but also enable it to handle a substantial volume of materials at once. Equipped with a powerful 550HP engine, the Unimax WD4000 tub grinder adopts a direct – drive mode. This design ensures that the WD4000 tub grinder can efficiently convert any biomass raw materials into debris with a high level of safety. Whether it’s tough wooden logs or voluminous straw, this crusher can break them down with ease. The resulting debris can then be effectively utilized as biomass energy, playing a crucial role in promoting sustainable energy development and resource recycling in the biomass energy sector.
| Model | WD3300 | WD3600 | WD4000 | |
|---|---|---|---|---|
| Rotor diameter (mm) | 600 | 670 | 700 | |
| Rotation speed (rpm) | 960 | 960 | 960 | |
| Blade quantity (piece) | 10 | 10 | 10 | |
| Engine power (hp) | 480 | 530 | 550 | |
| Diameter of feeding disk (mm) | 3300 | 3600 | 4000 | |
| Max material diameter (mm) | 2100 | 2350 | 2400 | |
| Production capacity (Tons Per Hour) | 20-30 | 30-40 | 40-50 | |
| Discharging Method | Hydraulic folding conveyor belt | Hydraulic folding conveyor belt | Hydraulic folding conveyor belt | |
| Discharging Size:L × W(mm) | 7000 × 1200 | 7000 × 1200 | 7000 × 1200 | |
| Depth of feeding disk (mm) | 1210 | 1210 | 1210 | |
| Feeding control method | hydraulic remote control | hydraulic remote control | hydraulic remote control | |
| Weight (T) | 14 | 15 | 17 | |
| Size L*W*H (mm) | 73000*2500*2600 | 7500*2550*2600 | 7600*2600*2600 |
The oversized feeding hopper is made of 10 mm thick manganese steel. Featuring great wear resistance and strong impact resistance, it is capable of crushing materials with extra-large diameters.
The machine’s outer enclosure is formed via integrated bending, with zero weld seams across the structure.
Local or remote control, with automatic feed monitoring to guarantee stable machine operation under all conditions.
700L high-strength steel discharge frame delivers high tensile strength, excellent toughness and light weight.
The discharge conveyor belt uses chevron-pattern nylon rubber. It boasts superior wear resistance and anti-slip properties, sturdy and durable for heavy-duty material conveying.
Optional engines of Weichai, Yuchai or Cummins; electric solutions are also available.
The WD Series Tub Grinders handle a wide range of biomass feedstocks, especially woody materials including waste wood, tree roots, stumps, trunks, branches, construction formwork, wood pallets and wood slabs, as well as agricultural residues such as cotton stalks, corn stalks and straw.
The WD Series Tub Grinders deliver a standard wood chip size of 5–10 cm, and is fully customizable to match operational requirements.
For example, biomass power plants typically burn straw, waste wood and branches as fuel. To meet boiler specifications, straw must be 6–10 cm in length, while wood and branch feedstock should be processed to 5–8 cm or finer.
The final output size is determined by screen aperture, rotor speed and number of blades.
The WD Series Tub Grinders features three purpose-built rotor types — blade rotor, hammer rotor — each optimized for processing distinct feedstocks. With quick, hassle-free rotor changeover, it delivers exceptional multi-task grinding versatility, adapting seamlessly to varying materials and production requirements.
The blade rotor of the WD Series Tub Grinders has been meticulously engineered. The rotor housing is fabricated from 25 mm thick high-manganese wear-resistant steel, while the main shaft is made of 45Cr alloy steel. Blade options include 55SiCr, H12 and Cr12MoV steel grades, all manufactured through a forging process, delivering excellent thermal fatigue resistance, wear resistance and impact resistance. The blades are secured by bolt sleeves and blade clamp plates, which reduces blade wear while protecting the blade body from direct impact by the material. Internally, the rotor is reinforced with five strengthening ribs and carries an additional 600 kg of internal weight, bringing the total rotor weight to 3 tons. This delivers exceptional inertia for greater cutting force and higher throughput.
The WD Series Tub Grinders is equipped with an American WPT clutch, whose heavy-duty industrial design ensures smooth power engagement and efficient transmission. Its start-up cushioning and overload protection significantly reduce shock to the engine and drivetrain, while high torque capacity and self-compensating wear adjustment minimize maintenance frequency and downtime, keeping the machine stable and reliable even under harsh, dusty and high-vibration conditions. As a leading American brand certified to ISO 9001-2015 and endorsed by ABS/DNV classification societies, WPT also serves as a mark of quality for the Unimax in international markets, strengthening customer trust and competitiveness.
The WD Series Tub Grinders are available with two power system options: electric motor and diesel engine. Engineered to deliver cost-effective power solutions for customers, they allow selection of the optimal power configuration to match diverse grinding scenarios and processing tasks. Electric motor options include brands such as Siemens and Wolong, while diesel engine options feature Weichai and Cummins.
The intelligent feed system self-monitors the machine’s engine speed, makes predictive adjustments and holds the engine at an optimal level, When the load is too large, the hopper will rotate in the reverse direction, so there is no need to worry about the problem of material jam. At the same time, The hydraulic lift device can lift the inlet system at a large angle when the machine needs maintenance. The rotor will be exposed for easy work. Reduce labor costs and no need for a crane copperation.
The WD Series Tub Grinders are equipped with a dual control system that supports two operating modes: a fixed electrical control cabinet and a remote control interface. The two modes complement each other to enable smart, user-friendly operation. Both the feeding and travel systems incorporate intelligent design, which not only enhances operational safety but also delivers a convenient and intuitive user experience.
Remote control crawler self-propelled, easy to move, maximum moving speed 2km/h
Can be towed by trucks, loaders, excavators, Support optional air brake
The Horizontal grinders allow for continuous feeding of long and straight material such as timber, branches, slab, batten, wood core, roots, bark, waste veneer, particle board, fiber board, sugarcane, reed, bamboo. etc.
Both Unimax horizontal and tub grinders excel at processing wood waste into saleable products. Choosing between a horizontal grinder and a tub grinder depends on your specific needs, including the types of materials you need to process, desired output size and consistency, mobility requirements, space availability, and budget considerations. Horizontal grinders allow for continuous feeding of long and straight material, while tub grinders are ideal at processing bulky and irregularly shaped materials like whole trees, stumps, brush, and demolition debris.
Of course, tell us your raw materials and uses, we will recommend the most cost -effective equipment. If it is for recycling, our engineers can make a solution for the production line for you.
We are a manufacturer with more than 20 years of experience. We have our own stock workshop, production workshop, assembly workshop, etc. We can provider comprehensive customization and after -sales support. There are no middlemen to earn differences, only lower prices and better support for you.
There are two kinds of power, diesel and electric, we can provide Cummins diesel engine with EPA/CE certification, customer can also choose china's famous brand Weichai and other brands which is Cost-effective and with proven quality.
When the machine is overloaded and blocked, the metal chain conveyor, pressure roller and rotor with blades will rotate in the opposite direction at the same time to discharge the blocked material, effectively reducing equipment damage.
Yes, as an agency, you will not only enjoy exclusive agency prices but also receive annual rebates. Additionally, our marketing team will provide you with terminal customer resources in your region.
The factors that affect the life of the horizontal grinder are generally these, whether the quality of the raw materials is thick and durable, regular maintenance, correct operation of the machine (reduce the wear of the machine), and reasonable working hours. Proper maintenance of the equipment can make the machine last 15-20 years.
