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NANJING ALAS INTERNATIONAL CO., LTD
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Plastic Shredder Blades

Our Plastic Shredder Blades are engineered to tackle the toughest recycling challenges. Whether you are processing soft film, rigid bottles, or heavy-duty plastic lumps, our blades provide the shearing force needed for consistent granulation.
Premium Metallurgy: Available in D2 (Cr12MoV1), SKD-11, and DC53 to ensure maximum edge retention.
Precision Heat Treatment: Vacuum-hardened to 56-62 HRC, providing a perfect balance between hardness and toughness to prevent chipping.
Custom Fit: Precision-machined bolt holes and dimensions to fit brands like Herbold, Cumberland, Rapid, and more.
  • L/C, T/T, Paypal, Money Gram

  • 10

Availability:
Quantity:

Plastic Shredder Blade Guide: Best Materials for Recycling

This guide helps you choose the right shredder blades, granulator blades, granulator knives, plastic crusher blades and recycling machine cutters for your plastic recycling.

1. Key Choices: 3 Main Materials for Plastic Recycling Tools

Simple picks for common plastics (perfect for crusher knife replacement).

Hard Plastics (ABS, PET, PVC)

Material: SKD-11
  • Best for hard, tough plastics

  • Long life, stays sharp longer

  • Stops shredder blades and granulator knives from chipping or breaking

Soft Plastics (PE, PP, Films)

Material: 9CrSi
  • Great for thin, stretchy films

  • Low cost, budget-friendly (ideal for basicplastic recycling tools)

  • Stops material sticking to plastic crusher blades and recycling machine cutters

Fiber-Reinforced / Thick Materials

Material: DC53
  • The tough, improved SKD-11 (for durable granulator blades)

  • Best wear resistance for fibers (perfect for heavy-dutyplastic recycling tools)

  • Handles thick, mixed waste well (reduces crusher knife replacement frequency)

2. Which Blade to Use? (Shredder & Granulator Knives)

Match the blade shape to your material (works for all plastic crusher blades):
  • Claw Blades → Sheets, pipes, barrels

  • Flat Blades → Films, bags, clean cuts

  • Rotary & Fixed Knives → Precise gap control = no burrs (for recycling machine cutters)

3. Quick Decision Guide (All Plastic Recycling Tools)

Just pick one based on your material (easy for crusher knife replacement):
  • Hard plastic (ABS/PET): SKD-11 (best for granulator knives and plastic crusher blades)

  • Soft plastic / film: 9CrSi (affordable recycling machine cutters)

  • Fiber / thick material: DC53 (durable granulator blades)

4. Quick Tips for Plastic Recycling Tools

  • Budget start: 9CrSi covers most jobs (saves on crusher knife replacement)

  • High performance: SKD-11 for most recycling (top choice forgranulator knives)

  • Heavy duty: DC53 for long life & tough jobs (best plastic crusher blades for fibers)

  Why Choose Our Shredder Tooling?

  • As a professional shredder tooling manufacturer, we are your all-in-one partner for recycling parts.

  • Our blades fit all well-known shredder machine brands.

  • Every blade goes through vacuum heat treatment, with steady hardness of 55–60 HRC.

  • We support OEM custom service. We can make special tooth and hook shapes to process hard waste materials.

  • Our technical team studies your materials and machine details.

  • We suggest the best blade material to cut your cost per ton.

  • We provide both standard replacement parts and fully custom designs to keep your shredder running well.

Blade Metal Materials International Grade Corresponding Table

China (GB)

USA(ASTM)

Japan (JIS)

Germany (DIN)

Germany (W-Nr)

France (NF)

Russia (ROCT)

U.K (BS)

9CrSi

-

-

90CrSi5

1.2108

-

9XC

-

DC53








Cr12MOV

-

SKD11

X165CrMov12

1.2601

-

X12M

-

Cr12Mo1V1

D2

-

X155Cr12Mo12

1.2379

X160CrMoV12

-

BD


Drawings of the blades for a plastic shredder

600-plastic-shredder-blades-drawing800-plastic-shredder-blades-drawing

FAQ

Q1: What is the best blade material for shredding dirty plastic?

For plastic mixed with sand, dirt and small metal pieces, DC53 or D2 (SKD11) is recommended. D2 has great wear resistance. DC53 is tougher, so its edges will not chip when hitting hard impurities.

Q2: How often should I turn or sharpen shredder blades?

Our square blades have four cutting edges. Rotate the blade to a new edge once your output slows down or more dust appears. Generally, check blades every 80–120 working hours. Harder plastic wears blades faster (glass-filled nylon wears blades quicker than LDPE).

Q3: Why does shredded plastic melt and stick to blades?

This problem usually comes from too much friction or dull blades. Blunt blades tear plastic instead of cutting it, which creates heat. Wrong blade gap is another reason. Proper clearance between rotor and fixed blades makes clean cuts and reduces heat.

Q4: Do your blades fit well-known European and American shredder machines?

Yes. We make precise replacement blades for top brands including Lindner, Vecoplan, Untha, Zerma and Weima. All sizes, bolt holes and sunk holes fully meet OEM standards for perfect installation.

Q5: What is the difference between vacuum heat treatment and ordinary hardening?

We use vacuum heat treatment. It makes hardness even from blade surface to inner core. Ordinary hardening leaves the blade core soft, causing fast wear and breakage. Our heat treatment keeps stable hardness at 58-62 HRC, and extends blade service life.

replacement blades for plastic shredderindustrial plastic recycling bladesPrecision plastic shredder blades and granulator knives

Global Supply: High-Performance Plastic Shredder Blades & Granulator Knives
We manufacture premium Plastic Shredder Blades (Material: D2, SKD11, DC53, 9CrSi) optimized for industrial plastic recycling, PET bottle crushing, and heavy-duty granulating:
  • English: Plastic Shredder Blades | Granulator Knives

  • French (Français): Lames de broyeur de plastique | Couteaux de granulateur

  • Portuguese (Português): Lâminas de triturador de plástico | Facas para granuladores

  • Polish (Polski): Noże do rozdrabniaczy tworzyw sztucznych | Noże do granulatorów

  • Turkish (Türkçe): Plastik Kırıcı Bıçakları | Granül Bıçakları Fabrikası

  • Vietnamese (Tiếng Việt): Lưỡi dao máy nghiền nhựa | Dao băm nhựa tái chế

  • Thai (ภาษาไทย): ใบมีดเครื่องย่อยพลาสติก | ใบมีดเครื่องบดเม็ดพลาสติก

  • Filipino: Mga Blade ng Plastic Shredder | Mga Kutsilyo para sa Granulator

  • Arabic (العربية): شفرات كسارات البلاستيك | سكاكين تقطيع البلاستيك وإعادة التدوير

  • Hindi (हिन्दी): प्लास्टिक श्रेडर ब्लेड | ग्रेनुलेटर चाकू

  • Indonesian (Bahasa Indonesia): Pisau Penghancur Plastik | Bilah Mesin Granulator

  • Malay (Bahasa Melayu): Bilah Pengisar Plastik | Pisau Mesin Granulator

  • Dutch (Nederlands): Kunststof versnippermessen | Messen voor granulatoren

  • Swedish (Svenska): Plastkvarnsknivar | Knivar för granulatorer

  • Hungarian (Magyar): Műanyag daráló pengék | Granuláló kések

  • Greek (Ελληνικά): Λεπίδες καταστροφέα πλαστικών | Μαχαίρια κοκκοποιητή

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Phone:
86-15852949220
Address:
Jiangning District, Nanjing
About Us

Nanjing Alas International Co., Ltd. is a professional industrial tooling manufacturer focused on shear blades, bending dies, shredder blades, and custom wear parts. We offer full application engineering, material selection, setup guidance, and after-sales support to global customers.
Tell us your requirements, and our engineering team will provide professional solutions for blade specification, tool life optimization, and cost-effective production.

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