Klinkenberg Shaftless Screws

Screw Conveyor Systems
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Shaftless Screw Conveyors

Shaftless screw conveying up to 90˚

Klinkenberg offers various solutions for shaftless screw conveying. This type of spiral is used for dewatering products or discharging material from a silo. Shaftless spirals prevent bridging, accelerating the process. Discover what Klinkenberg can offer in the field of shaftless conveying.
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Shaftless Screw ConveyorsEfficiency and reliability in bulk handling

Shaftless Screw Conveyors, also known as shaftless spirals, are specifically designed for the effective and efficient transport of a wide range of materials. These systems are particularly well-suited for conveying wet, fibrous, and sticky substances, making them a reliable solution for various industries.

Technology behind Shaftless Screw Conveyors

Shaftless Screw Conveyors use a robust spiral screw without a central shaft, rotating inside a U-shaped or fully enclosed trough with a wear-resistant plastic or stainless steel lining. This design prevents clogging and increases conveying capacity, as the material can move freely through the trough without obstructions. The spiral is driven by a powerful motor and gear reducer combination. Low rotational speed and even loading ensure minimal wear and a long service life. Thanks to their flexible design, these systems can be installed horizontally, at an incline, or even vertically, depending on specific process requirements.

Advantages of Shaftless Screw Conveyors

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No Central Shaft

The absence of a central shaft prevents material build-up, enabling higher fill rates and more efficient transport.

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Low Maintenance

Thanks to the simple design, these screws are less prone to wear, resulting in lower maintenance costs and reduced downtime.

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Design Flexibility

Shaftless screws can be tailored to your specific process requirements, with options for horizontal, inclined, and vertical configurations.

Applications

These screw conveyors are used in a wide range of sectors, including:

  • Sludge Processing:
    Ideal for transporting and dewatering sludge in wastewater treatment plants.
  • Waste Management:
    Suitable for handling waste streams with varying capacities.
  • Food Industry:
    Efficient in processing wet and sticky food products.
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Capabilities of Shaftless Screw Conveying

Shaftless screw conveyors are used not only in sludge and waste processing but also in the food industry and horticulture. We design the spiral to your specifications, taking material and dimensions into account.

  • Proven concept
  • Customer-specific solutions
  • Horizontal and Vertical use
  • Easy-to-replace wear plates
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Flexible Conveying with Shaftless Screws

Shaftless screw conveying allows transport at angles up to 30°. For some products, shaftless spirals can even achieve vertical transport without issues. The use of additional support spirals helps prevent backflow of the material. If you're looking for specific possibilities in shaftless conveying, our sales advisors are happy to discuss the options with you.

Klinkenberg

Custom Shaftless Screw Conveying

The shaftless screw conveyors are manufactured in our high-tech production facility, equipped with seven machines for producing screw flights and spirals. Our design process accounts for forces and material stresses to ensure optimal performance. We custom-develop components tailored to your needs.

At Klinkenberg, you benefit from years of experience in shaftless screw conveying. We also guarantee excellent value for money and a customer-focused approach.

Klinkenberg ZaanstadYour partner in Shaftless Screw Solutions

At Klinkenberg B.V., we have years of experience in developing and manufacturing shaftless screw conveyor systems. Our products are designed with attention to detail and tailored to the specific needs of your process. We offer a wide range of sizes, from diameters of 80 mm to 600 mm, manufactured from high-quality materials such as steel and stainless steel.

Conclusion

Shaftless screw conveyors provide an efficient and reliable solution for transporting various materials in different industries. At Klinkenberg, we combine years of expertise with high-quality products to meet your specific requirements. Contact us today to discuss the possibilities for your company.

Klinkenberg offers, among others:

  • Custom solutions:
    Our systems are designed to meet the specific requirements of your industry.
  • Quality:
    With over 150 years of experience, we guarantee top-quality products.
  • Service:
    Our skilled technicians provide personal and customer-oriented support, both during and after installation.

We’re happy to help

Our team is ready every day to support your critical processes.

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Applied Technologies We always choose the right technology for your process

Klinkenberg technologies include the following options:

  • ATEX
  • Finishing
  • Welding
  • Bearings
  • Seals
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Innovation in Every Screw Movement

Discover the advanced technologies behind our screw conveyors. From bearings and seals to ATEX compliance, learn how we tailor every component to match your production requirements. Our section offers insights into material selection, safety standards, and hygienic design to optimize your processes. We always select the right technology for each customer’s process.

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Variants

Shaftless for Vegetables

Waste Disposal for Cutting Residues
For a vegetable cutting company, Klinkenberg manufactured multiple receiving hoppers with shaftless discharge screws. The cutting waste is collected in the hopper and dosed neatly into a screw press.

Asloos voor groente

Discharge Bottom

Biomass Dosing
Shaftless discharge system for a biomass receiving hopper. The hopper serves as intermediate storage for the biomass. The six shaftless screws ensure a consistent, even feed to the gasifier.

Uitdraagbodem

Sludge Transport

Industrial Sludge Transport
For a sludge processing company, Klinkenberg produced multiple screws for transporting industrial sludge. With shaftless discharge screws, spans of 25 meters and height differences of 12 meters are achieved.

Slib transport

Sand Separator

Separation of Solids
In the UK, several sand separators were delivered to separate solids from a water stream. A large settling tank allows heavy particles to settle, after which a shaftless screw conveyor removes and separates them from the water.

Zandseparator

Documentation Exclusive with a personal design

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Asloos schroeftransport

Product brochure

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Bulk density table

Bulk density table

Expressed in kg/m³ and lbs/ft³

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FAQ Direct answers to your questions

Find quick answers to frequently asked questions about Shaftless Screws. Our FAQ section helps you make the right decision.

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A shaftless screw conveyor is a screw system without a central shaft, designed for efficiently moving materials—especially wet, fibrous, and sticky substances.

These screws are suitable for a wide range of materials including sludge, waste streams, food products, and other bulk goods.

Shaftless screws offer higher fill rates, less risk of material buildup, and generally require less maintenance.

They are used in various sectors such as sludge processing, waste management, and the food industry.

We offer diameters ranging from 80 mm to 600 mm, manufactured from steel and stainless steel.

Due to the absence of a central shaft and their robust design, maintenance is minimal—resulting in lower operating costs.

Yes, we design our systems to meet the specific needs of your industry and process.

The trough of a shaftless screw conveyor is equipped with a wear-resistant plastic or stainless steel liner to reduce the impact of abrasive materials. The low rotation speed also contributes to uniform loading, reducing wear and extending liner life.

Transport capacity is significantly influenced by the diameter of the screw. Larger diameters (e.g. 400–600 mm) can handle higher volumes, while smaller diameters (80–200 mm) are better suited for precise dosing and controlled flows. The correct diameter depends on throughput requirements and material properties.

To prevent damage from overload, shaftless screw conveyors can be equipped with torque limiters, torque monitoring, and frequency-controlled drives. These technologies ensure the screw slows or stops automatically when overloaded, protecting both the drive and transport components from excessive wear or mechanical failure.