1. Working Principle & Cutting Style
- Double shaft shredder: two counter‑rotating shafts with interlocking cutters tear, shear, and squeeze material.
- Runs at low speed with high torque; suitable for bulky, tough, and mixed waste.
- Single shaft shredder: one rotating shaft and fixed counter blades, often with a pusher and screen.
- Cuts more precisely; better for soft, uniform, or fibrous material.
2. Output Size & Downstream Matching
- Double shaft usually produces coarse and irregular pieces because it often works without a screen.
- Mainly used for pre‑shredding and volume reduction.
- Single shaft can control particle size through a screen, so output is more uniform.
- If the next step needs fine and stable size (extrusion or pelletizing), single shaft is often more suitable.
3. Material Suitability
- Double shaft: better for tires, metal scrap, electronic waste, household appliances, plastic barrels, wood pallets, and mixed industrial waste.
- Single shaft: better for plastic film, plastic pipes, textiles, paper, rubber, and clean plastic waste.
- Double shaft is more versatile; single shaft is more specialized.
4. Which One Is Better
- Neither type is always better.
- Choose double shaft when material is large, hard, mixed, or difficult to feed.
- Choose single shaft when material is soft, clean, and needs precise output size.
- For export projects, final choice should be confirmed by material sample, target output size, hourly capacity, and downstream process requirement.
