You are here: Home » Products » Crusher Blade & Chipper blade & Shredder blade » Industrial Plastic Shredder Machine Blades

All
Product Name
Product Keyword
Product Model
Product Summary
Product Description
Multi Field Search

Product Category

plastic shredder machine blades for industrial recycling and granulating

Heavy-duty skd-11 steel rotor blades for industrial plastic shredder machines

Share to:

Industrial Plastic Shredder Machine Blades

Counter Knives / Stator Blades

Payment Terms:
L/C, T/T, Paypal, Money Gram
Min. Order:
10

Availability:

Quantity:



Inquire Add to Basket

How to Optimize Plastic Shredder Blade Life for High-Efficiency Recycling

1. The Role of Blades in Plastic Recycling

Plastic shredder blades are key to recycling. Their sharpness directly affects how much energy the machine uses and the quality of the plastic pieces it makes. Dull blades make the machine work harder, use more energy, and produce uneven, low-quality plastic. Sharp, good blades cut down energy waste and make consistent, high-quality output—important for fast, efficient recycling.

Boost your recycling speed with our top-quality plastic shredder blades. They’re made for tough use, great for shredding hard plastic lumps, PET bottles, and thick pipes. We use real DC53 or SKD-11 steel, heated in a vacuum to HRC 58-62. The blades have a smooth, precise finish to stop plastic from melting. We can also make custom blades (OEM) from your drawings or samples, fitting any shredder brand. As a professional granulator knives manufacturer, we supply industrial plastic crusher blades and replacement blades for plastic recycling to help you work better.

2. Plastic Shredder Blade Material Guide

Blade material decides how well the machine shreds, how long blades last, and how stable the machine runs. Different plastics (hard/brittle, soft/tough, fiber-reinforced/thick) need blades with different hardness, strength, and cutting power. Our factory matches the right blade material for three main plastic types: ABS/PS/hard PVC, PE/PP/PA/film, and fiber-reinforced/thick/mixed plastics. We explain each material’s key features and best uses to help you choose.

3. Plastic Types & Blade Material Rules

A plastic’s hardness, strength, and fiber content affect how blades work during shredding. Hard, brittle plastics hit blades hard; soft plastics wrap around blades or stick to them; fiber-reinforced plastics wear down blades quickly. Follow these simple rules to pick the right blades:

Hard plastics: Choose blades that are hard, wear-resistant, and can take impact
Soft plastics: Choose blades that are strong, tough, and cut well
Fiber-reinforced plastics: Choose blades that resist wear and chipping

Picking the right material makes blades last longer, cuts costs, and makes recycling faster.

4. Blades for Specific Plastic Types

4.1 Blades for Hard Plastics (ABS/PS/Hard PVC)

4.1.1 Plastic Traits

Hard plastics are hard and break easily. When shredded, they hit blades hard, which can chip blades or make them dull fast. Blades need to be very hard, wear-resistant, and able to take impact.

4.1.2 Recommended Material

SKD-11 High-carbon high-chromium alloy steel

4.1.3 Key Features

Very hard and wear-resistant, stays sharp long, and rarely gets dull;
Handles hard plastic impact well, won’t chip or break;
Strong cutting edge, good for fast cutting of hard, brittle plastics.

4.2 Blades for Soft/High-Toughness Plastics (PE/PP/PA/Soft PU/Film)

4.2.1 Plastic Traits

Soft, tough plastics are stretchy and flexible. They’re hard to cut, often wrap around blades, stick to them, or come out as strips. Blades need to be tough, cut well, and have smooth edges.

4.2.2 Recommended Material

9CrSi Chromium Silicon Steel (use special alloy steel for thin materials like film or woven bags)

4.2.3 Key Features

Tough and hard to break, works well with the shredder’s fast cutting to slice stretchy plastics;
Smooth, precise cutting edges stop soft plastics from sticking or wrapping, keeping work fast;
Easy to grind to a sharp edge.

4.3 Blades for Fiber-Reinforced/Thick/Mixed Materials

4.3.1 Plastic Traits

Fiber-reinforced plastics (glass or carbon fiber) have hard fibers that wear down blades fast. Shredding thick or mixed materials puts blades under impact, wear, and cutting force—this is the hardest test for blades.

4.3.2 Recommended Material

DC-53 High-Strength Tough Alloy Steel

4.3.3 Key Features

More wear-resistant than SKD-11, with great hardness and toughness—solves fiber-reinforced plastic wear and makes blades last much longer;
Won’t chip or break easily, handles thick material impact and mixed material stress well;
Stays stable at high temperatures, cutting edge doesn’t bend during long, continuous shredding of thick or mixed plastics.

5. Best Material for Plastic Shredder Blades

5.1 Choose by Plastic Type

Hard plastics (ABS/PS/Hard PVC) → SKD-11
Crushing Knives for Waste Electronic Enclosures
Soft plastics (PE/PP/PA/Soft PU/Film) → 9CrSi
Fiber-reinforced/thick/mixed materials → DC-53
Blades for Shredding Large Plastic Drums & Pallets

5.2 Choose by Usage

Entry-level/general use: 9CrSi (cheap, works for most plastics with no special needs).
Professional/fast use: SKD-11 (popular for mid-to-high-end shredders, best value for money).
Wear-resistant (higher budget): DC-53 (for high-fiber and thick materials).

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-drawing 400-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.