Precision Shearing: Low Speed Grinding Shredder Blades & Beside-the-Press Solutions
In plastic and rubber closed-loop manufacturing, low speed grinding shredders control material quality.
High-speed granulators break materials by impact.
Low-speed systems (20–40 RPM) use high-torque shearing.
This process works well only if the shredder blades are strong and precise.
The Metallurgy of Low-Speed Shredder Blades
Our beside-the-press recycling blades are engineered for this exact task.
Low-speed grinding puts great pressure on blade edges.
Blade Material Selection
To avoid deformation, top blades are made from SKD-11 or DC53 alloy steel.
SKD-11 Tool Steel – Chemical Composition & Properties
Chemical Composition
C: 1.40–1.60
Increases hardness, strength, and wear resistance by forming hard carbides.
Cr: 11.00–13.00
Improves hardenability, wear resistance, corrosion resistance, and dimensional stability.
Mo: 0.80–1.20
Enhances temper resistance, refines grain size, and improves toughness and high-temperature strength.
V: 0.20–0.50
Refines microstructure, increases wear resistance, and prevents grain growth during heat treatment.
Si: ≤0.40
Improves strength, hardness, and deoxidizes during steelmaking.
Mn: ≤0.60
Increases hardenability and strength, reduces brittleness.
P: ≤0.030
Harmful impurity, controlled to low levels to avoid brittleness.
S: ≤0.030
Harmful impurity, limited to ensure good toughness and machinability.
Mechanical & Service Properties
High hardness: HRC 60–62 after quenching and tempering.
Excellent wear resistance: Suitable for long‑service molds under heavy abrasion.
High hardenability: Can be hardened uniformly in large cross‑sections by air cooling.
Good dimensional stability: Small distortion during heat treatment.
Moderate toughness: Better than conventional high-carbon high-chromium tool steels.
Good temper resistance: Maintains hardness at moderate working temperatures.
Typical Applications
Stamping dies, blanking dies, cold heading dies, trimming tools, cutting blades, and precision wear‑resistant components.
Blade Geometry for High-Quality Regrind
Low-speed shredders make high-quality regrind—that’s their main value.
Poor blades crush materials, making dust that ruins injection molding.
Scissor-Cut Design: Precise ground angles cut cleanly.
This reduces heat and keeps materials in good condition.
Optimized Clearance
A tight 0.1mm gap between rotor and stator ensures even particle size.
This is key for stable melt flow indexes (MFI).
Maximizing Blade Life & Cost Savings
To save money long-term, choose staggered-tooth shredder knives.
These blades can be rotated multiple times before needing regrinding.
Check bolt tightness and clean V-slots regularly.
This prevents vibration wear, extending blade and machine life.
Key Takeaway
Your recycling quality depends on your blade’s sharpness.
Invest in high-precision low speed grinding shredder blades.
You’ll get a cleaner workspace, more recovered material, and higher profits.
Slow Machine-Side Plastic Crusher
Slow machine-side plastic crushers are made for use near injection molding machines.
They have low RPM, low noise, and low dust.
They’re perfect for recycling plastic sprues and waste right away—paired with our beside-the-press recycling blades for best results.
Product Features
Low speed: 28–300 RPM. Less heat, no plastic melting, better recycled material.
Quiet: Soundproof box and sound-absorbing cotton. Meets industrial noise standards.
No screen: Even particles, little dust. Can mix directly with new material.
Durable blades: SKD-11 and imported steel. Wear-resistant, long life—just like our staggered-tooth shredder knives.
Automatic feeding: Some models have this to boost efficiency.
Applicable Scenarios
Injection molding recycling: Crush sprues and defective parts near machines instantly.
Hard plastics: PC, nylon, ABS, etc.
Soft plastics: LDPE film, PP woven bags (some models).
About Our Blade Manufacturing
We are a professional blade manufacturer.
We research, make, and sell blades.
We have years of experience and technical skills.
We provide efficient, durable, precise blade solutions—including beside-the-press recycling blades and staggered-tooth shredder knives.
Our blades are used in plastic, rubber, wood, metal recycling, and food processing.
Our Advantages
Quality materials: High-hardness alloy steel, high-speed steel, tungsten carbide.
They resist wear and impact, and last long.
Precision technology: Advanced CNC machines and heat treatment.
This ensures blades have stable size and performance.
Custom service: We make blades in different sizes, shapes, and materials.
We meet your diverse crushing needs—from beside-the-press to heavy-duty shredding.
Strict quality checks: Every blade is tested carefully.
They meet international standards and are reliable.
Efficient after-sales: Professional technical support and fast response.
We solve your problems quickly.
Choosing us means choosing quality and trust.
We look forward to working with you to grow the crushing industry.