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What's the Difference Between Single, Dual & Quad Shaft ...

Author: Helen

May. 06, 2024

What's the Difference Between Single, Dual & Quad Shaft ...

What's the difference between single, dual and quad shaft shredders?

With so many different shredders on the market, it can be overwhelming to understand which shredder would work best for you. Many shredder manufacturers offer three main types of plant-based shredders: single shaft, dual shaft, and quad shaft. So, what are the differences between them, and how can you determine which one is best for your business? Continue below, and we'll guide you toward the solution that meets your application.

The primary differences among these shredders, beyond the number of shafts, are the shred size and shaft speed. Shred size determines whether the remaining scraps will be large and irregular or small and uniform, while shaft speed impacts throughput rates and the types of materials that can be shredded with that particular shaft type.

Dual shaft shredders are slow-speed machines that produce large, inconsistent shreds that are the width of the knife and various lengths—sometimes up to 2' to 3' long, depending on the material. On the other hand, single shaft shredders operate at high speeds and produce small, consistent shreds based on the size of the screen within the shredder. These shredders also utilize a ram to force-feed the material into the rotor.

Four shaft or quad shaft shredders are also slow-speed machines but produce small, consistent shreds sized according to the screen in the shredder.

How Do You Know Which Shredder Will Work Best for You?

There are two main factors to consider when determining which shredder best suits your needs: the application and shred size. If you need a shredder that produces a consistent shred size for purposes like confidential document destruction, you might lean towards a single or quad shaft shredder. These models contain screens that ensure each shred is reduced to specific dimensions.

Alternatively, if you need to reduce your waste size without specific size requirements, a dual shaft shredder may be the right choice. Dual shaft shredders are versatile, handling a wide range of applications including plastics, tires, e-scrap, paper, and metals. They are often used as primary shredders for the size reduction of bulky material.

Quad shaft shredders are commonly used for e-scrap and medical waste, as they efficiently produce consistent and small particle sizes across various materials.

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Lastly, single shaft shredders are popular in the wood and plastics industries because they use sizing screens to provide a uniform shred size.

Ultimately, most of these shredders can handle a wide range of applications. However, the most crucial factor in selecting your shredder is your end goal with the shredded material. Every business has unique requirements; our experts will collaborate with you to find the best solution!

Industrial single-shaft, double-shaft or four-shaft shredder? ...

The single-shaft (single-rotor), double-shaft or four-shaft industrial shredders guarantee different performances and are suitable for the treatment of various types of materials.

 

To choose the appropriate type of shredder, it is necessary to consider several factors, such as:

 

  • Type of material to be shredded: Some materials can be treated by either single-shaft, double-shaft, or four-shaft shredders, while others require a specific type. For example, Rubber and WEEE can only be shredded with a double shaft, while plastic or industrial pallets require treatment with a single rotor.

 

  • Dimensions of the material to be shredded: Generally, double-shaft shredders are used for large waste because they drastically reduce volume thanks to their double blade system that turns in opposite directions. Four-shaft shredders further enhance this technology, equipped with a grid to calibrate sizes, making them suitable for treating substantial quantities of large waste. Single-rotor units are best for grinding smaller material, but customizable blade dimensions allow them to remain highly efficient and cost-effective in the long term compared to double-shaft shredders.

 

  • Possible presence of non-shreddable material: It's crucial to consider if the material to be treated contains non-shreddable components that might damage the blades. If unsure, opting for a slow single shaft device is better, as it suffers less damage and can receive maintenance assistance faster than double-shaft or four-shaft shredders. Additionally, the Camec single-shaft shredder features a shock sensor that stops the machine if it collides with foreign components.

 

  • Post-treatment size of the material: If your primary goal is to reduce material volume, a double-shaft shredder is ideal. If uniform residue size is desired, a single-rotor, which uses a grid to regulate material output, is more suitable. If the material can't be treated with a single-rotor but you still want to control the shredding product's size, a four-shaft shredder equipped with a grid may be the best choice.

 

To discover the characteristics of our single-shaft, double-shaft, and four-shaft industrial shredders and to find out what type of material they can handle, download the CAMEC Industrial Shredder Guide!

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