Plastic Crusher Blades

Plastic crusher blades are specialized cutting tools used in plastic crushing machines to shred and granulate plastic materials such as PET bottles, plastic films, pipes, containers, and other plastic waste. These blades are designed for high wear resistance, durability, and precision to ensure efficient cutting and long service life.

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Customized sizes are available, according to your drawing or sample.

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Overview
Features
Parameters
FAQ
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YISHI Machinery manufactures plastic crusher blades for granulators, shredders, and size-reduction equipment used in plastics recycling and processing. These blades are machined from high-alloy tool steels—including D2 (Cr12MoV), SKD11, 9CrSi, DC53, and HSS—and are vacuum heat-treated to HRC 58–62 for an optimal balance of edge retention and impact toughness. Each blade is surface-ground to Ra ≤ 0.4 µm and inspected to dimensional tolerances of ±0.02 mm. Custom geometries are produced to customer drawings, with OEM-compatible profiles for common machine brands. Typical applications include size reduction of PET bottles, HDPE containers, PVC pipes, film, and purgings.

Material Grades
Available in D2 (Cr12MoV), SKD11, 9CrSi, DC53, W6Mo5Cr4V2 (HSS), and tungsten carbide (YG) to match specific wear and impact requirements. Material certificates provided on request.
Heat Treatment
Vacuum heat-treated and triple-tempered to achieve a uniform hardness of HRC 58–62. Cryogenic treatment available for D2 grades to reduce retained austenite and improve dimensional stability.
Precision Grinding
All cutting edges are ground to a surface finish of Ra ≤ 0.4 µm, with flatness and parallelism held to 0.01 mm. Multi-axis CNC grinding ensures consistent blade geometry across production batches.
Custom Configurations
Blades are manufactured to customer-provided drawings or samples. We produce single-shaft, double-shaft, and granulator blades with bolt-hole patterns, counterbores, and mounting slots as specified.
Wear Resistance
High carbide volume in D2 and DC53 grades provides excellent abrasion resistance when processing filled or reinforced plastics, typically extending service intervals by 30–50% compared to lower-alloy steels.
OEM Compatibility
Profiles compatible with common granulator brands including Zerma, Vecoplan, Cumberland, and Rapid. Non-standard designs are reverse-engineered from worn samples.

Take a Closer Look

Plastic Recycling Facilities
Plastic Manufacturing Plants
Pipe and Profile Extrusion
Film and Sheet Recycling
Waste Management Facilities

Plastic Recycling Facilities
Granulating post-consumer PET bottles, HDPE containers, and PP waste into clean flake for reprocessing. Blades withstand contaminants and abrasive fillers.
Plastic Manufacturing Plants
In-house regrind of sprues, runners, and reject parts from injection moulding and blow moulding operations. Consistent cut quality ensures uniform regrind particle size.
Pipe and Profile Extrusion
Shredding PVC, PE, and PP pipes and profiles into chips for material recovery. Heavy-duty blades with high impact toughness prevent chipping on thick-walled sections.
Film and Sheet Recycling
Cutting PE film, PP raffia, and PET sheet into small pieces for washing and pelletizing. Sharp, thin blades minimize energy consumption and heat generation.
Waste Management Facilities
Primary size reduction of mixed plastic waste in single-shaft and dual-shaft shredders. Blades with high hardness and corrosion-resistant coatings available for wet waste streams.

Key Features&Applications:

Made from high-quality tool steel or alloy steel (e.g., D2, SKD11, 9CrSi, etc.)
Heat-treated for hardness and wear resistance
Sharp and durable edges for efficient crushing
Customizable shapes and sizes to fit different machines and materials
Suitable for crushing a wide range of plastics, including hard and soft plastics

Plastic recycling and processing industry
Waste management facilities
Plastic manufacturing plants

Proper maintenance and timely replacement of blades are essential for optimal performance and prolonged use of the crusher machine.

Industrial knives for plastic shredding operations

Technical Parameters

Material		9CrSi、Cr12Mov、SKD-11、D2、DC53、W6Mo5Cr4V2、YG
Advantage		Accurate product size, long tool wear life, and high sharpness
Size		Customize production according to customer requirements
Application		Recycled plastics, recycled plastic pellets, plastic recycling, plastic manufacturing
More		Please chat with our customer service department for more accurate information

Technical Specifications

Dimensions	Typical OD 200–600 mm, ID 50–150 mm, thickness 10–40 mm for rotary blades; length 200–800 mm, width 50–150 mm, thickness 10–30 mm for fixed blades. Custom dimensions per drawing.
Materials	D2 (Cr12MoV), SKD11, 9CrSi, DC53, W6Mo5Cr4V2 (HSS), YG (tungsten carbide)
Hardness	HRC 58–62 for tool steels; HRA 89–92 for tungsten carbide
Tolerances	Dimensional tolerance ±0.02 mm; flatness and parallelism 0.01 mm; hole position tolerance ±0.05 mm
Surface Finish	Ra ≤ 0.4 µm on cutting edges; ground finish on all functional surfaces
Customisation	Custom sizes, bolt-hole patterns, counterbores, mounting slots, and blade profiles per customer drawing or sample. OEM part number cross-referencing available.

Why Choose Yishi

YISHI Machinery operates an ISO 9001-certified manufacturing facility with in-house vacuum heat treatment, cryogenic processing, and multi-axis CNC grinding. Every blade batch is inspected with CMM and hardness testing, and material certificates are traceable to mill origin. We maintain a dedicated engineering team for application-specific blade design and offer expedited lead times for custom orders. With over 15 years of experience supplying cutting tools to the recycling and plastics industries, we provide technical support from material selection to after-sales sharpening advice.

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Frequently Asked Questions

What steel grade is best for crushing glass-fibre-reinforced plastics?

For abrasive materials like glass-filled nylon, we recommend D2 (Cr12MoV) or DC53 at HRC 60–62. These grades have high carbide content for wear resistance. Tungsten carbide blades may be considered for extremely high-volume processing, though they require careful handling to avoid fracture.
Can you match the blade dimensions from my existing worn blade?

Yes. Send us a drawing or the worn blade, and our engineering team will reverse-engineer the original geometry, including bolt-hole positions and cutting angles. We can also suggest material upgrades if premature wear is an issue.
What is the typical lead time for custom crusher blades?

Standard custom orders ship within 15–20 working days after drawing approval. Expedited service is available for urgent requirements. Stock blade programs can be arranged for repeat orders to reduce lead times.
How often should crusher blades be sharpened?

Sharpening intervals depend on material type, throughput, and contamination levels. As a guideline, blades processing clean, unfilled plastics may run 300–500 hours before requiring sharpening. We offer re-sharpening services and can advise on proper grinding angles to maximise blade life.
Do you provide blades for specific granulator brands?

We manufacture blades compatible with most major granulator and shredder brands, including Zerma, Vecoplan, Cumberland, Rapid, and others. Provide the machine model and blade part number, and we will quote the exact replacement.
What tolerances can you hold on blade dimensions?

Our standard tolerance is ±0.02 mm on critical dimensions, with flatness and parallelism within 0.01 mm. Tighter tolerances can be achieved upon request for high-precision applications.