Premium High Efficiency Industrial Blades Granulator Knives For Recycling Plastic Rubber For Shredding Machinery Cutting

Premium high-efficiency granulator knives and industrial blades for plastic/rubber recycling machinery. Engineered for sharp, clean cutting in shredding applications, maximizing output and operational efficiency.

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ShengAo Premium High Efficiency Granulator Knives & Industrial Blades

Premium high-efficiency granulator knives and industrial blades for plastic/rubber recycling machinery

Engineered for sharp, clean cutting in shredding applications. Maximizes output and operational efficiency in plastic and rubber recycling processes. Accepts customized sizes and supports OEM & ODM services.

Key Specifications

Brand Name

ShengAo

Type

Cutting Parts

Place of Origin

Anhui, China

Core Components

Blade

Material

HSS / Stainless Steel / D2

Application

Plastic Recycling Machine

Size

Accept Customized

OEM & ODM

Support

Quality & Service

Quality Assurance

Machinery test report:

Not Available

Video outgoing-inspection:

Provided

ISO

Certificate:

ISO9001

Warranty & Support

Warranty:

1 Year

After Warranty Service:

Online Support

Service:

Provide Customized Services

Lead Time

Production Lead Time (Days)

Varies by quantity

Custom Schedules Available

Quantity-Based Lead Time

Quantity (pieces)	Lead Time (days)	Status
1 - 10	26 days	Standard
11 - 20	28 days	Medium Batch
> 20	To be negotiated	Custom Schedule

Lead time is estimated from order confirmation and may vary based on customization requirements.

Raw Materials & Alloys

Crafted from premium materials for exceptional performance and durability

Alloy Structural Steel Blades

Hot Work Die Steel Blades

Blade Restoration Solutions

Wear-Resistant Steel Blades

YG8 Tungsten Carbide

Cold Work Die Steel Blades

Alloy Tool Steel Blades

About Our Premium Granulator Knives & Industrial Blades

The granulator rotor knives and bed knives are the precision heart of any plastic or rubber recycling system. These cutting components directly determine the efficiency, particle consistency, and energy consumption of the granulation process. Engineered for the demanding task of transforming plastic scrap, lumps, or rubber into uniform granules or flakes, ShengAo's premium knives are built to deliver maximum cutting efficiency, sharpness retention, and long-term operational reliability, maximizing output and minimizing downtime in your recycling operation.

Premium Material & Construction

Our granulator knives are manufactured from premium materials selected for their balance of wear resistance and toughness. We offer High-Speed Steel (HSS) for excellent edge retention and heat resistance during continuous cutting, D2 tool steel for high wear resistance and hardness, and stainless steel options for applications requiring corrosion resistance. Each knife undergoes precision machining, specialized heat treatment, and grinding to achieve a razor-sharp, burr-free cutting edge with exacting dimensional tolerances. This ensures optimal clearance angles, perfect alignment with the bed knife, and consistent, clean cuts that produce high-quality granules with minimal fines.

Key Features & Benefits

Designed for high efficiency and longevity, ShengAo granulator knives offer significant operational advantages. The primary benefit is sharp, clean cutting performance, which produces uniform granules with low dust generation, crucial for downstream processing and material value. Their exceptional wear resistance extends the service life between sharpenings, reducing maintenance frequency and associated production downtime. This high efficiency translates directly to increased throughput and lower energy consumption per kilogram of processed material. The robust design ensures stable performance under continuous load, providing a reliable and cost-effective cutting solution that enhances the overall productivity of your plastic or rubber recycling line.

Application Industries & Materials

These high-performance knives are specifically engineered for the plastics and rubber recycling industry. They excel in granulating and size-reducing a wide array of materials including PET flakes, HDPE/PP containers, ABS, PS, PVC, engineering plastics, plastic films, sheets, purgings, and synthetic rubber. They are the essential component in central granulators, beside-the-press granulators, shredder-granulator combination systems, and recycling pelletizing lines. Ideal for operations focused on post-industrial plastic scrap recovery, bottle-to-flake recycling, and synthetic material reprocessing, these knives ensure consistent granule quality that is critical for extrusion, molding, or direct sale.

Customization & Quality Assurance

We specialize in providing fully customized knife solutions to perfectly match your specific granulator model and application needs. We support comprehensive OEM and ODM services, accepting customized sizes, hole patterns, edge geometries, and material specifications. Our commitment to quality is backed by an ISO9001 certified management system and demonstrated through comprehensive video outgoing-inspection for each order. While a machinery test report is not standardly provided for this product line, our stringent manufacturing controls ensure consistent quality. Every knife is backed by a solid 1-year warranty and comes with access to online after-sales support, ensuring you have a reliable partner for your critical cutting components.

Top 5 Granulator Knife Brands for Precision Plastic Recycling

Achieving consistent, high-quality plastic granules requires precision-engineered cutting knives. The following manufacturers are globally recognized for their material expertise, cutting geometry design, and proven performance in demanding granulation applications.

ShengAo

A leading specialist in recycling cutting tools, ShengAo manufactures premium granulator knives from HSS, D2, and stainless steel. Renowned for their precision grinding and heat treatment, their knives deliver sharp, clean cuts for high-quality plastic granules. With strong OEM/ODM support, ISO9001 certification, a 1-year warranty, and video inspection quality control, they offer a highly efficient and customizable solution for plastic and rubber granulation processes.

HSS / D2 / Stainless ISO9001 Certified 1-Year Warranty

Rapid Granulator

A Swedish pioneer in size reduction, Rapid is synonymous with high-quality granulation. Their knives are engineered for low-energy, low-heat cutting to preserve material properties. Offering various knife geometries and materials (including special grades for abrasive materials), Rapid knives are designed for maximum sharpness retention, clean cuts, and easy maintenance within their renowned granulator systems.

Low-Energy Cutting Material Preservation

Vecoplan

The German technology leader provides robust granulator knives as part of their complete shredding and granulation systems. Vecoplan knives are built for durability and high throughput in demanding recycling environments. They often feature innovative mounting systems and cutting geometries tailored for specific material streams, from post-consumer plastics to industrial film waste, ensuring efficient and reliable size reduction.

High Throughput Application-Specific

Zerma

Another German specialist, Zerma manufactures granulators and knives with a strong focus on longevity and low operating costs. Their knife systems are designed for easy maintenance, resharpening, and often utilize segmented or reversible designs to maximize edge life and provide a cost-effective total cost of ownership for continuous plastic recycling operations.

Cost-Effective TCO Easy Maintenance

Foremost Machine Builders

A US-based manufacturer of size reduction equipment, Foremost produces durable granulator knives for their machinery. Their knives are designed to handle a wide range of materials and are known for their robustness and reliability in North American recycling markets, often providing good performance for general-purpose and heavy-duty granulation tasks.

Robust Design General Purpose

Frequently Asked Questions (FAQs)

Get expert answers to the most common questions about our Premium Granulator Knives for efficient plastic and rubber recycling.

Granulator knives and shredder blades serve different functions in size reduction. Granulator knives (rotor and bed knives) work in a scissor-like shear-cutting action at relatively high speed to produce small, uniform granules or flakes (typically 3-12mm). They are designed for precision cutting and generating a clean product. Shredder blades typically use a ripping, tearing, or crushing action at lower speeds to perform primary size reduction of large, bulky items into smaller pieces (50-100mm). Granulator knives focus on final product size and quality, while shredder blades focus on volume reduction and breaking down large objects for further processing in a plastic recycling plant.

The choice between High-Speed Steel (HSS) and D2 tool steel depends on your material and operation. Choose HSS knives if you process materials that generate significant heat during cutting (e.g., continuous high-throughput runs, tough engineering plastics) because HSS retains its hardness at elevated temperatures better than D2. It also offers good toughness. Choose D2 knives for superior wear resistance when processing highly abrasive materials (e.g., fiberglass-filled plastics, mineral-filled compounds) where extended edge life is the priority, and heat generation is moderate. For general-purpose plastic granulation of materials like PET, HDPE, or PP, both can be excellent; HSS may offer better performance in hot conditions, while D2 may last longer between sharpenings in abrasive conditions.

The sharpening interval for granulator knives varies widely based on the material processed, knife material, and machine operation. For non-abrasive plastics (e.g., clean PET bottles), knives might last several weeks or months of continuous operation before needing sharpening. For abrasive materials (e.g., glass-filled nylon), sharpening might be needed weekly or even daily. Key indicators for sharpening include: increased power consumption, larger or inconsistent granule size, excessive fines/dust, and reduced throughput. High-quality knives like ShengAo's can be resharpened multiple times (often 5-10 times) before replacement is necessary. Proper maintenance and timely sharpening are crucial for maintaining granulation efficiency and product quality in your recycling operation.

For orders of 11 to 20 pieces, our standard production lead time is 28 days after order confirmation and deposit receipt. Therefore, an order of 15 pieces falls into this category and will typically be completed within 28 days. This timeline includes material procurement, precision machining, heat treatment, final grinding to achieve the specified cutting edge, and quality inspection. For orders of 1-10 pieces, the lead time is 26 days, and for orders exceeding 20 pieces, we negotiate a custom schedule. We provide clear lead times to help you plan your machine maintenance and spare parts inventory effectively.

Yes, ShengAo specializes in OEM and ODM manufacturing of replacement knives for virtually all major brands and models of granulators, including Rapid, Vecoplan, Zerma, Foremost, Nelmor, and many others. To ensure a perfect fit and optimal cutting performance, we require either the original knives as a sample, detailed engineering drawings with all critical dimensions (length, width, thickness, hole sizes and positions, cutting angles), or precise machine specifications (make, model, OEM part number). We replicate the exact geometry and can advise on material upgrades. Our customized services ensure you get a high-performance, cost-effective alternative for your specific plastic granulation equipment.

For our granulator knife product line, a formal machinery test report is not a standard offering, which helps keep costs competitive. However, our commitment to quality is assured through our ISO9001 certified quality management system and our unique video outgoing-inspection service. Before your order is shipped, our quality control team creates a video specifically documenting the final inspection of your knives. This video typically shows visual checks for finish, verification of key dimensions with measuring tools, and sometimes a functionality check. This provides you with transparent, visual proof that your custom industrial knives have passed our rigorous checks and meet your specifications, offering peace of mind comparable to a written report.

Correct installation is critical for performance and safety. Key steps include: 1) Clean all mounting surfaces on the rotor and in the knife boxes thoroughly. 2) Install the bed knives (stationary knives) first, ensuring they are seated flat and secured to the specified torque. 3) Install the rotor knives, making sure they are also seated properly and tightened evenly to the correct torque sequence. 4) Set the knife clearance (typically 0.1-0.3 mm) between the rotor knife and bed knife using feeler gauges, following the machine manufacturer's specifications. 5) After installation, manually rotate the rotor several full cycles to ensure no contact, then run the granulator empty for a short time to check for vibration or unusual noise before feeding material.

Yes, our granulator knives can be effectively used for post-consumer plastic film waste, such as LDPE stretch film, shopping bags, or packaging film. However, granulating film presents unique challenges like wrapping and low bulk density. For optimal results, it is crucial to use a granulator specifically designed or configured for film (often with special rotor designs, feed systems, and screen configurations). When used in such a machine, our sharp and precisely ground knives will provide clean cuts, minimize melt-welding, and help produce uniform flakes. We can advise on the best knife geometry and material (sometimes a polished surface or specific edge angle is beneficial) for your film recycling application to maximize efficiency and output quality.

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Premium High Efficiency Industrial Blades Granulator Knives For Recycling Plastic Rubber For Shredding Machinery Cutting

Product Video Demonstration

Product Specifications