Kowloon heavy-duty industrial tub grinder is engineered to maximize volumetric throughput, transforming bulky, irregular wood waste into high-value biomass feedstock or premium mulch. Driven by high-torque power configurations and featuring an extra-wide, deep-flared rotating tub with a disc inlet exceeding 3 meters, the system allows massive tree stumps, roots, branches, forestry residues, and stubborn bark to be directly dumped into the continuous-feed grinding chamber.
Available in both stationary and mobile configurations, our tub grinders deliver a high-capacity processing throughput of 10 to 50 tons per hour (TPH) depending on material density. By integrating advanced knife-cutting technology, this system completely replaces traditional, energy-intensive wood splitting and chipping machines, significantly lowering operational and labor costs. Equipped with a heavy-duty folding hydraulic discharge conveyor for flexible material stockpiling, Kowloon tub grinders are widely utilized in biomass power plants, paper mills, sawdust manufacturing facilities, charcoal processing lines, wood-based panel factories, and commercial wood processing hubs worldwide.
Industrial tub grinder is a highly versatile, high-throughput recycling machine designed to handle large, bulky, and irregular wood waste that would easily choke or damage standard wood chippers. Thanks to its massive rotating tub inlet and high-torque kinetic crushing mechanisms, it can process a wide spectrum of forestry, agricultural, and municipal organic waste:
1. Land Clearing & Forestry Waste: Massive tree stumps, entire root, bulky tree branches, and mixed green waste.
2. Industrial & Construction Wood Waste: Broken wooden pallets, scrap lumber, construction timber with embedded nails/screws (extracted via an integrated downstream magnetic separator), and old crates.
3. Sawmill & Timber Processing Byproducts: Tough and fibrous log bark, soft slabs, edgings, trimming waste, and off-cuts from timber mills.
4. Agricultural Crop Residues: Tightly compressed agricultural straw bales, corn stalks, cotton stalks, coconut shells, and palm oil empty fruit bunches (EFB).
5. Urban & Municipal Green Waste: Yard trimmings, leaves, pruned brush, and organic yard waste collected from municipal land clearing operations.
💡 Expert Tip for Buyers: Because material density directly dictates hourly throughput, actual production capacities can vary between 10 and 50 tons per hour (TPH). Contact us to receive a custom equipment configuration tailored precisely to your specific feedstock and production goals.
Tree Root
Biomass Straw
Branches
Wood Waste
Timber Waste
Tub grinder utilizes gravity, smart rotation, and high-velocity kinetic impact to reduce bulky wood waste at 10 to 50 tons per hour (TPH). Massive tree stumps, bark, or branches are loaded via a grab loader into the extra-wide rotating tub. As the tub rotates, it tumbles the payload downward into the base grinding chamber.
To prevent overloading and material wrapping, an intelligent auto-reverse sensor automatically pauses or reverses the tub rotation when dense material slows engine RPM. At the bottom, a heavy-pivot, dynamically balanced rotor with hardened alloy knives smashes and shears the feedstock. Once pulverized down to size, compliant particles pass through replaceable sizing screens onto a folding hydraulic discharge conveyor.
Kowloon Machinery tub grinders deliver field-proven performance worldwide, transforming bulky forestry residue and agricultural waste into high-value biomass fuel. Our stationary and mobile systems excel in diverse climates, maximizing ROI for global bioenergy plants.
Project 1: In 2025, a Egyptian client deployed our mobile tub grinder to process massive tree stumps, roots, and log bark. The intelligent auto-reverse tub system successfully resolved the issue of the machine jamming due to material blockage.
Project 2: A wood recycling plant integrated our stationary tub grinder with a 2-meter disc inlet. Utilizing a grab loader for continuous feeding, the system rapidly pulverized bulky wood waste.
Kowloon Machinery offer both stationary and mobile types tub grinder. Review the comprehensive technical parameter matrix below to select the precise motor power, tub dimensions, and chassis configuration tailored perfectly to your specific material reduction goals and operational footprints.
|
Model |
JLTG3000 Tub Grinder | JLTG3600 Tub Grinder |
|
Engine power |
340HP |
389KW /530HP |
|
Engine manufacturer |
Yuandong |
WEICHAI |
|
Fuel consumption |
10-30L/H |
20-40L/H |
|
Spindle working speed |
1200rpm |
1200rpm |
|
Processing range |
Max. 2000 mm |
Max. 2350 mm |
|
Feed hopper open size |
Diameter 3000mm |
Diameter 3600mm |
|
Feed hopper depth |
1200mm |
1370mm |
|
Feed hopper power |
1set hydraulic pump drive |
1set hydraulic pump drive |
|
Feed hopper to ground |
2700mm |
2900mm |
|
Chipping area |
Diameter 2200mm |
Diameter 2350mm |
|
Discharge belt conveyor |
1200mmx3000mm |
1200mmx3000mm |
|
Discharge conveyor speed |
150m/min |
150m/min |
|
Bottom knife fixing bolts |
12units |
|
|
Bottom knife dimensions |
1100*110*30mm |
|
|
Bottom knife quantity |
2units, made of H13 |
2units |
|
Moving knife bolts |
5units |
|
|
Moving knife dimensions |
710*280*30mm |
|
|
Moving knife quantity |
6units, made of H13 |
9units |
|
Knife rotor size |
1850mm*610mm |
2150*610mm |
|
Discharge conveyor motor |
1unit hydraulic pump drive |
1unit hydraulic pump drive |
|
Discharge height |
4m |
4m |
|
Feeding control |
Hydraulic joysticks |
Hydraulic joysticks |
|
Traction mode |
Truck mounted type |
Truck mounted type |
|
Hydraulic system |
Hydraulic oil tank volume 300L 24v Solenoid valve, remote control |
Hydraulic oil tank volume 300L 24v Solenoid valve, remote control |
|
Control system |
Wireless control panel (in 50m range) |
Wireless control panel (in 50m range) |
|
Working capacity |
10-15tons/hour (wood wastes) |
30-50tons/hour (wood wastes) |
|
Dimensions |
10500*2350*3200mm |
11000*2550*3600mm |
|
Weight |
18tons |
20tons |
Looking for a customized tub grinder solution? Tell us your raw material, capacity, and available space. Our engineers will recommend the right model, provide a price list, and design a free 2D factory layout plan for your biomass recycling business. Contact us now!
The complete system is integrated with an advanced, automated PLC control unit supporting long-range wireless remote control. This smart automation significantly slashes manual labor costs while ensuring the highest level of workplace safety during heavy-duty operations.
Engineered with operator convenience in mind, the machine features a heavy-duty hydraulic box-flipping device. When routine maintenance or blade inspection is required, the entire rotating tub can be tilted at a wide angle via hydraulic cylinders. This design provides open-air access to the rotor chamber, drastically reducing maintenance downtime and manpower.
The cutting core utilizes a heavy-duty, multi-knife rotor roller configuration. The blades are mathematically arranged in a staggered pattern to maximize kinetic impact per rotation. This precision engineering ensures uniform sizing of tough forestry waste while minimizing friction heat, significantly extending the operational lifespan of the alloy blades.
To completely eliminate mechanical jams when processing massive materials, the tub drive adopts smart frequency conversion technology. The system continuously monitors the real-time load of the main rotor; if the load spikes and risks choking the engine, the feed hopper automatically rotates in the opposite direction for a split second to reposition the payload, guaranteeing uninterrupted operation.
Featuring an advanced offset feed port coupled with an inlet exceeding three meters, the tub grinder prevents bulky or long materials from bridging at the mouth. The offset engineering design utilizes gravity more efficiently, guiding irregular logs and large roots smoothly down into the active grinding zone without requiring manual pre-chopping.
The inner wall of the rotating feed hopper is armed with heavy-duty, wear-resistant material-selecting teeth. These specialized teeth act as an auxiliary feeding mechanism, continuously gripping, tumbling, and tearing dense agricultural straw bales or tangled branches as the tub rotates, ensuring a steady and forced downward material flow.
Driven by a heavy-duty, high-torque power setup, the mechanical synergy between the automated variable-speed tub and the multi-knife rotor allows the system to flexibly adapt to varying material densities. This delivers a stable and high-volume commercial production capacity ranging from 10 to 50 Tons per Hour (TPH), maximizing your plant's ROI.
Kowloon tub grinders are engineered with standardized industrial modularity. The hydraulic folding discharge conveyor can easily connect with downstream magnetic separators, or secondary fine-grinding Biomass Hammer Mills, serving as the ultimate, reliable primary shredding stage for large-scale wood pellet and bioenergy production lines.
| Comparison Item | Tub Grinder | Wood Chipper |
| Feedstock Flexibility | Extreme. Handles massive tree stumps, roots with dirt, log bark, wooden pallets, and agricultural straw bales. | Limited. Limited to logs, branches, and uniform wood off-cuts. |
| Inlet Mechanism | Extra-wide rotating tub (>3 meters); allows direct dumping via grab loader with zero pre-splitting. | Infeed Chain Plate; different models have restrictions on the material diameter (≤400mm). |
| Output Characteristics | Shreddable, fibrous biomass feedstock, uniform compost material, or premium mulch. | Uniform, sharp-edged wood chips for paper pulp, sawdust making or pellet lines. |
| Primary Application | Large-scale biomass power plants, municipal green waste recycling, and land clearing processing hubs. | Sawmills, paper mills, forestry logging sites, and small-to-medium pellet factories. |
A: Yes. We provide both heavy-duty stationary units for centralized factory installations (such as biomass power plants, paper mills, and wood-based panel factories) and highly versatile mobile types equipped with rugged trailer chassis for field land-clearing, forestry logging, and municipal green waste recycling operations.
A: The primary advantage is its extreme feedstock flexibility and high volumetric throughput. While traditional wood chippers can only process clean, straight logs and branches, and risk catastrophic blade damage from dirt or nails, a tub grinder features an extra-wide rotating tub inlet (>3 meters). This allows grab loaders to directly dump massive tree stumps, roots with soil, contaminated pallets, and tough bark into the chamber without any manual pre-splitting, achieving a continuous production rate of 10 to 50 tons per hour.
A: Kowloon tub grinders utilize an intelligent, PLC-controlled frequency conversion system. The sensor constantly monitors the real-time load and RPM of the heavy-duty rotor. If a massive root or highly fibrous material spikes the workload and slows the engine, the smart tub automatically pauses and reverses its rotation for a split second to reposition the payload. Once optimal running speed is restored, forward rotation resumes seamlessly, completely eliminating manual downtime and mechanical jams.
A: The output size is primarily determined by the interchangeable sizing screen mesh installed beneath the main rotor roller. Depending on your downstream processing goals, the system can produce coarse shreds, fibrous biomass boiler feedstock, or premium landscape mulch ranging from 20mm to over 100mm. If your project requires ultra-fine powder (≤10mm), we recommend linking the tub grinder’s discharge conveyor directly to a secondary Biomass Hammer Mill system.
A: Not at all. Kowloon engineers have designed this equipment for low-manpower maintenance. The system is equipped with an integrated hydraulic material box-flipping device. With a simple control switch, the entire rotating tub can be tilted at a large angle via hydraulic cylinders, providing open, ground-level access to the internal rotor chamber. This allows technicians to replace blades or change sizing screen meshes quickly, maximizing factory uptime.
A: This depends entirely on your operational footprint and mobility requirements. For centralized factory setups with a stable power grid—such as large-scale biomass pellet mills or stationary bioenergy plants—an electric motor drive is highly recommended as it minimizes energy costs and simplifies routine motor maintenance. However, for land clearing, forestry logging sites, and municipal green waste yards where power grids are unavailable, our diesel-powered mobile trailer chassis offers complete off-grid autonomy while delivering the exact same high-torque performance.
A: To maintain a continuous 10 to 50 TPH production rhythm, the critical wear components that undergo the most kinetic friction are the replaceable alloy hammer inserts (knives), the breaker plates, and the under-mill sizing screens. Kowloon utilizes premium, wear-resistant chromium-carbide coatings on these components to maximize their service life. We recommend that factories maintain a minimum on-site backup stock consisting of one complete set of rotor knives and at least two different mesh-sized replacement screens. Because our machine features a large-angle hydraulic tub-flipping system, an operator can replace an entire set of worn blades at ground level within a single scheduled maintenance shift, keeping unscheduled operational downtime near zero.
A: Tub Grinder is designed to process a wide range of materials, including wood waste, tree branches, pallets, logs, green waste, agricultural residues, and biomass materials. It is widely used in recycling, composting, and biomass fuel production industries.
Different agricultural waste (rice straw, wheat stalk, bagasse) requires customized blade speeds and torque configurations. Click below to submit your material specifications and project goals for a free customized machine quotation within 24 hours.
Choosing Kowloon Machinery’s industrial tub grinder means investing in high-efficiency bulk reduction (10–50 TPH) and automated field safety. Engineered for efficient biomass and wood waste processing. Built with durable steel structure, advanced cutting technology, and stable feeding systems, our tub grinders help reduce operating costs while improving output consistency. We provide customized solutions, reliable after-sales support, and global project experience. With a focus on energy efficiency, low maintenance, and long service life, Kowloon Machinery Tub Grinder is a trusted choice for modern waste recycling and material size reduction applications worldwide.
With 20 years of experience in recycling equipment manufacturing, Kowloon Machinery provides reliable and heavy-duty double shaft shredders designed for demanding industrial applications. More than 3000 machines have been delivered to over 80 countries, serving metal recycling plants, tire recycling lines, biomass waste recycling factory, and solid waste processing projects worldwide. Every shredder is fully tested before shipment to ensure stable performance and long service life. Backed by CE and ISO certifications, professional engineering support, and customized recycling solutions, Kowloon Machinery helps customers build efficient and profitable shredding systems.
We warmly welcome customers from around the world to visit our factory and see the double shaft shredder manufacturing process in person. During the visit, you can observe raw material machining, blade production, machine assembly, and live testing with real materials. This transparent process helps customers clearly understand our production standards, quality control, and equipment performance before placing an order.
Our engineers will also provide on-site explanations and discuss your project requirements, offering practical suggestions for your biomass waste recycling line. A factory visit is the best way to build confidence in the machine quality and our long-term cooperation.
To ensure long-term, stable operation of the double shaft shredder, we provide a complete spare parts supply system and reliable after-sales support. Key components such as shredder blades, shafts, bearings, and gearbox parts are manufactured with high-strength alloy materials and kept in regular stock for fast replacement. Our blade design focuses on wear resistance and easy maintenance, allowing customers to reduce downtime and operating costs.
We also offer clear guidance on blade replacement, routine maintenance, and spare parts management. With sufficient inventory and responsive technical support, customers can quickly obtain original parts and professional assistance whenever needed, ensuring the double shaft shredder continues to run efficiently in demanding biomass waste recycling environments.
We provide complete support for the shipping and installation of every double shaft shredder to ensure smooth delivery and fast commissioning at the customer site. Before shipment, each machine is carefully packed, reinforced, and loaded to prevent damage during long-distance transportation. Detailed layout drawings, foundation requirements, and electrical connection plans are prepared in advance to help customers get ready before the equipment arrives.
After delivery, our engineers offer remote guidance or on-site installation support, including assembly, wiring, testing, and operator training. From unloading the machine to trial operation with real biomass materials, we ensure the double shaft shredder runs safely and efficiently as part of the biomass straw recycling line.
Our double shaft shredders are manufactured in compliance with international quality and safety standards to ensure reliable performance in demanding recycling environments. The equipment is built according to CE requirements for machinery safety and follows ISO quality management standards throughout the production process. From raw material selection and machining to assembly and final testing, every step is strictly controlled to guarantee durability and operational stability. Certification documents and test reports can be provided upon request, giving customers full confidence that the double shaft shredder meets global industry requirements for biomass waste recycling applications.
