Material & Hardness
• 65Mn / T10: HRC 52–55, soft plastic (film/woven bag)
• 9CrSi / SK5: HRC 55–58, ordinary hard plastic (ABS/PP/PE blocks)
• SKD-11 / D2: HRC 58–62, engineering material / containing glass fiber (PC/PA/PET)
• Cr12MoV: HRC 59–63, high strength, thick plate, high wear resistance
• High-speed steel M2: HRC 62–64, suitable for continuous operation under high temperature and high wear conditions.
2. Common dimensions (mm)
• Small (300–600 type)
◦ Cutting tools: 150×40×6, 180×50×8, 200×60×10
◦ Fixed knife: 150×40×8, 200×50×10
Pitch: 60/70/80, Hole diameter: Φ10 – 14
• Medium-sized (700–1000 type)
◦ Cutting tools: 250×60×10, 300×80×12, 400×80×15
◦ Fixed knife: 250×60×12, 300×80×15
Pitch: 100/120, Hole Diameter: Φ16 – 20
• Large (1200+ )
◦ Cutting tool: 500×100×20, 600×120×25
◦ Fixed knife with the same width and increased thickness
3. Structure and Blade Shape
• Flat knife (flat edge): Soft material such as film or foam, blade angle 30–45°
• Claw knife / Hook knife: Blocks / Pipes / Hard plastic, strong tearing capability
• Teethed cutter: Hard sheet material / PVC pipe, tooth spacing 5–8mm
• Double-edge blade: Can be flipped over for use, doubling the lifespan.
4. Process Parameters
• Blade angle: 22–30° (larger for harder materials)
• Blade gap: 0.5 - 3mm (for controlling the size of the discharged particles)
• Surface: Blackened / Nitrided / Quenched Original Color
• Matching rotational speed: 1500 – 3000 r/min
II. Single-axis shredding machine blades (dominated by square blades / small square blades)
Material & Hardness
• SKD-11 / Cr12MoV: Mainstream, HRC 58–62
• 9CrSi: Economic grade, HRC 55–58
• D2 / H13: High wear resistance / impact resistance, HRC 60–63
• Hardened carbide: Extremely wear-resistant (high abrasive/with grit)
2. Standard small knife size (mm)
35×35×25: Film / Mesh bag / Fine material
• 40×40×25 (Most commonly used): Plastic blocks / sheets / rubber
50×50×30: Thick material / Large piece / Wood
• 80×80×30: Heavy-duty / Tire / Thick plate
3. Fixed knife (matching knife)
• Size: Same as the width of the knife box × 40/50 × 20/25/30
• Quantity: 2 - 6 pieces (random type)
4. Installation and Structure
• Blade shaft: Φ300/350/400/450/50
• Blade arrangement: Spiral/step type, reducing impact
• Blade type: Single/Double edge, Trapezoidal/Right angle
• Matching speed: 80–150 r/min (low speed with high torque)
