If you need a uniform fraction in a single pass, a four-shaft shredder with integrated screen is the solution. The four rotors, driven by two motors with differential speeds, process bulky materials, and the bottom screen holds back oversized pieces until they reach the set particle size.
The machine combines the throughput of a twin-shaft shredder with the precision of a granulator, in a compact assembly. It is suited to pallets, wood waste and other bulky materials. See the full range of recycling equipment.
Key Advantages of a Four-Shaft Shredder
• Uniform fraction in a single pass, the integrated screen internally recirculates oversized pieces.
• Four rotors, two motors, the differential speeds reduce the risk of jamming.
• Large feed opening, accepts bulky materials without prior preparation.
• Sliding screen, the particle size is changed quickly.
• Compact footprint, shredding and calibration are integrated.
• Low dust and noise, operation at low speed and high torque.
• Individually removable blades, segment-by-segment replacement.
• Automatic reversal, fast recovery on overload.
Technical Specifications, Four-Shaft Shredder
| Parameter | Value |
|---|---|
| Machine type | Four-shaft shredder with integrated screen |
| Drive | Two motors with differential speeds |
| Blades | Heat-treated alloy steel, individually removable |
| Particle size | Determined by the integrated screen |
| Screen | Sliding, change without disassembly |
| Jam protection | Automatic reversal |
| Operating mode | Low speed, high torque |
Applications and Industries
The shredder is chosen when the output must have a controlled particle size for particle board, MDF, pellets, briquettes or cogeneration. The integrated screen delivers the calibrated fraction without an external screening machine.
Compared with a shredder followed by an external screen, it reduces the number of machines, the space occupied and the complexity of the installation. For integration into a complete flow, see the full industry solutions.
Besides wood, suitable configurations can process hard plastic, rubber and other bulky materials, without these changing the main category of this product.
Compatible Materials
| Accepted material | Notes |
|---|---|
| Pallets and wood waste | Including with minor metal impurities |
| MDF, particle board and plywood | Wood-based composite materials |
| Hard plastic | With the appropriate screen and blades |
| Rubber and mixed waste | With an adapted configuration |
How It Works
1. The bulky material is fed into the wide opening.
2. The two pairs of rotors progressively shear the material.
3. The pieces below the set particle size pass through the screen.
4. Oversized pieces are processed again inside.
5. On overload, the rotors automatically reverse direction.
6. The sliding screen is changed laterally for a different particle size.
Frequently Asked Questions
Why four shafts instead of two?
Four rotors with differential speeds reduce jamming, and the integrated screen calibrates the output in a single pass.
What particle size does it produce?
The particle size is determined by the openings of the installed sliding screen.
Can it process materials other than wood?
Yes, with the appropriate screen and blades it can also process hard plastic, rubber or mixed materials.
How is the screen changed?
The screen is pulled out laterally, without disassembling the rotors.
Why URSTAG?
URSTAG is a premium brand of recycling equipment, with over 15 years of experience. You don't just get a machine, you get a solution engineered by specialists, built from top-tier components and backed by a team that supports you from design through commissioning.
• European engineering, every machine and every complete line is designed by our engineering teams in Europe, with a focus on reliability, safety and energy efficiency.
• Premium components, we build on motors and automation from industry leaders: Siemens, Schneider Electric, ABB, WEG, SEW-Eurodrive, NORD Drivesystems and Bonfiglioli.
• Over 15 years of experience, we know how materials and machines behave in real-world operation, and we configure each solution for your flow and volume.
• New equipment, configured for you, we supply new units, made to order for your application, with complete technical documentation.
• Delivery, installation and training included, we handle transport, commissioning and operator training, with support throughout the equipment's life.
As a premium brand, URSTAG relies on European engineering, top-tier components and experience. You choose a partner that supports your production long term, with equipment built to run reliably in demanding industrial environments.
