A Twin-Shaft Shredder (also known as a double-shaft crusher or twin-shaft shear shredder) is a heavy-duty solid waste size-reduction machine engineered on the “shearing and tearing” principle. Utilizing two counter-rotating cutter shafts equipped with interlocking alloy steel blades, it efficiently shreds bulky, tough, and high-hardness materials into uniform small pieces, making it indispensable for solid waste volume reduction, resource recycling, and organic waste pre-treatment.
Description
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A Twin-Shaft Shredder (also known as a double-shaft crusher or twin-shaft shear shredder) is a heavy-duty solid waste size-reduction machine engineered on the "shearing and tearing" principle. Utilizing two counter-rotating cutter shafts equipped with interlocking alloy steel blades, it efficiently shreds bulky, tough, and high-hardness materials into uniform small pieces, making it indispensable for solid waste volume reduction, resource recycling, and organic waste pre-treatment.
2. How does Twin-Shaft Shredder work?
Bulky raw materials (feed sizes up to ≤600 mm – ≤2400 mm) are loaded into the heavy-duty hopper and enter the shredding chamber. Driven by high-torque electric motors (ranging from 15 kW up to 160 kW × 2) through planetary gearboxes, the two parallel cutter shafts rotate toward each other at low speeds (14–20 r/min).
The hooked alloy steel blades (hardness ≥56HRC) grab, shear, tear, and squeeze the materials simultaneously, reducing them to uniform output sizes of 3–10 cm (or 30–50 mm). Controlled by an intelligent PLC system with automatic overload reverse protection, the shafts automatically reverse when encountering unbreakable objects, preventing blade damage and ensuring continuous throughput from 0.2–5 t/h up to 25–60 t/h.
3. Advantages of Twin-Shaft Shredder
- Low Speed, High Torque & Low Noise: Operates at low rotational speeds (14–20 r/min) with massive shearing torque, delivering high crushing efficiency while keeping operational noise low (≤85 dB(A)).
- Wear-Resistant & Repairable Alloy Blades: Blades are forged from special alloy tool steel (hardness ≥56HRC). Tooth profiles and thicknesses can be customized per material, and worn blades can be repaired and reused.
- Intelligent PLC Auto-Reverse Control: Equipped with Siemens/standard PLC and overload auto-reverse function to prevent jamming and protect motors and gearboxes.
- Heavy-Duty Sealed Bearing Structure: Multi-layer sealed bearings isolate dust and liquid, making the shredder suitable for wet, liquid-containing organic waste and municipal sludge pre-treatment.
4. Application of Twin-Shaft Shredder
- Organic & Agricultural Waste Pre-Treatment: Shredding bulky crop straw, garden waste, dead livestock, and packaged organic waste prior to aerobic fermentation.
- Wood & Biomass Processing: Crushing timber, pallets, tree roots, and furniture waste (e.g., dedicated wood model KJSS-80).
- Plastics, Rubber & Tires: Size reduction of plastic drums, pipes, woven bags, waste tires, and industrial plastics.
- Municipal Solid Waste (MSW) & Scrap Recycling: Shredding bulky household waste, light scrap metal, e-waste, and industrial refuse (large models like 2PGS-100 support car shells up to 264 kW).
5. Specifications of Twin-Shaft Shredder
| Model | Performance Parameters | Structural Parameters | Blade Parameters | Drive & Control | Notes / Application |
|---|---|---|---|---|---|
| 2PGS-10 | Capacity: 0.2–5 t/h Feed Size: ≤600 mm Output Size: 3–10 cm |
Chamber: 600 × 360 mm | Dia: φ200 mm Qty: 30 PCS Material: Special Alloy Steel |
Power: 15–22 kW Control: PLC + Touch Screen |
Compact unit for small-piece waste recycling. |
| 2PGS-40 | Capacity: 10–30 t/h Feed Size: ≤1200 mm Output Size: 3–10 cm |
Chamber: 1200 × 740 mm | Dia: φ430 mm Qty: 30 PCS Material: Special Alloy Steel |
Power: 90–110 kW Control: Overload Protection + Auto-Reverse |
Ideal for industrial plastic & wood shredding. |
| YSSD-1000 | Capacity: 5–25 t/h Feed Size: ≤1000 mm Output Size: 3–10 cm |
Chamber: 1000×600 / 1000×1000 mm | Hardness: ≥56 HRC Customizable Tooth Profile |
Power: 37–45 kW Speed: 14–20 r/min Control: Auto-Reverse |
Low noise (≤85 dB(A)); general solid waste reduction. |
| KJSS-80 | Capacity: 4–5 t/h Feed Size: ≤200 mm (Wood) Output Size: 30–50 mm |
Chamber: 822 × 1221 mm Feed Inlet: 1996 × 1597 mm Weight: 11,000 kg |
Qty: 23 + 22 PCS Material: Alloy Cutter Disc |
Power: 75 kW × 2 Control: Anti-Jamming Auto-Reverse |
Dedicated heavy-duty wood & timber shredder. |
| XY-2600 (Ref.) | Capacity: 25–60 t/h Feed Size: ≤2400 mm Output Size: 3–10 cm |
Hopper: 2425 × 1400 mm Weight: 36 t |
Dia: φ720 mm Qty: 40 PCS Material: Alloy Tool Steel |
Power: 4–160 kW × 2 Speed: 16–18 r/min Control: Siemens PLC |
CE Certified; ultra-heavy-duty large solid waste line. |
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