Intended for the transport of difficult, materials – suitable for a wide range of moisture contents and viscosities

SPIROLINE® Horizontal/Inclined Shaftless Spiral/Screw Conveyors

SPIRAC is a global leader in shaftless spiral (screw) conveying technology, with thousands of installations operating successfully around the world. Our proven shaftless conveyor systems deliver reliable, cost-effective transport of screenings, grit, sludge and other challenging materials, offering significant operational and maintenance advantages over conventional conveying methods.

SPIROLINE® shaftless screw conveyors feature a robust U-trough design with a low-speed, shaftless spiral rotating on a specially engineered low-friction, wear-resistant liner. This configuration ensures efficient material movement while minimising wear, energy consumption and maintenance requirements.

Many materials handling applications involve abrasive, corrosive or difficult-to-convey substances that place significant demands on equipment. By eliminating the central shaft, SPIROLINE® conveyors achieve higher filling rates and improved conveying efficiency compared to traditional screw conveyors. The open design reduces the risk of blockages, lowers power consumption and significantly decreases maintenance, resulting in a more reliable and cost-effective conveying solution.

 

PRODUCT BENEFITS
  • High volume capacity for a small cross section
  • Intended for the transport of difficult, stringy, spongy, sticky, wet, lumpy materials – suitable for a wide range of moisture contents and viscosities
  • Complex geometries and limited space easily satisfied
  • Low RPM for long life expectancy to wear components
  • Totally enclosed troughs for odour and mess containment
  • Very high load/torque capability
  • Low maintenance costs
  • Long continuous runs on a single gearbox
  • Easily able to handle large foreign objects or product lumps
  • Forgiving operation allows for wide capacity range
  • Custom designed to match field equipment
  • High resistance to corrosion provides for very long equipment life expectancy in the harshest of conditions
  • High-Strength Shaftless Spiral
    The SPIRAC shaftless spiral is engineered to achieve higher filling rates and operate at lower rotational speeds, reducing wear, maintenance requirements and downtime. Manufactured primarily from high-strength Swedish steel, the spiral offers exceptional tensile strength and durability. This robust design enables reliable conveying of difficult materials, including dewatered sludge, wastewater screenings, grit, industrial sludges and other sticky, viscous or fibrous products.
  • No Intermediate or End Bearings
    By eliminating intermediate and end bearings within the conveyed material, SPIRAC conveyors reduce maintenance demands and minimise wear points. This design also enables efficient horizontal, inclined and vertical transfer between conveying systems without interruption.
  • DURAFLO® SPX Wear Liners
    SPIRAC’s proprietary DURAFLO® SPX liner is engineered for long service life and dependable performance. The liner includes an integrated wear indicator and a convenient snap-in, snap-out design, allowing fast inspection and straightforward replacement when required.
  • Fully Enclosed Trough Design
    SPIRAC conveyors are fully enclosed to prevent material spillage and contain odours. This helps maintain a cleaner, safer working environment while reducing housekeeping and environmental management requirements.
  • Efficient Direct Drive System
    The direct-drive configuration delivers efficient power transmission without the maintenance associated with belt- or chain-driven systems. Fewer moving components mean improved reliability, lower maintenance costs and increased operational uptime.

 

Photo gallery

Shaftless Spiral Conveyor Material Transport Demonstration

Shaftless Spiral Conveyor Features and Benefits

Shaftless Spiral Conveyor Installation, Operation and Maintenance

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      OUR FAQS

      Frequently Asked Questions

      Why Should You Buy From SPIRAC?

      SPIRAC is a trusted global leader in engineered wastewater solutions for materials handling, delivering reliable, purpose-built systems backed by decades of expertise. Customers choose SPIRAC for its ability to design and manufacture high-quality shaftless spiral conveyors, screenings handling systems, and bulk solids handling equipment that perform in the toughest industrial and wastewater environments. With a strong focus on innovation, durability, and low maintenance, SPIRAC solutions are engineered to reduce downtime, improve operational efficiency, and minimise lifecycle costs. Supported by a global footprint and dedicated local service, SPIRAC partners closely with clients to provide customised, end-to-end solutions that consistently deliver long-term value and performance.

      When you choose SPIRAC, you can expect a reliable partner committed to delivering high-performance, engineered solutions tailored to your specific needs. From the initial consultation through design, manufacturing, and installation, SPIRAC works closely with clients to ensure every system is fit-for-purpose and built to last. You can expect robust equipment designed for harsh operating conditions, minimal maintenance requirements, and long service life. SPIRAC also provides strong technical support, responsive service, and ongoing collaboration to optimise system performance, reduce operational costs, and ensure your materials handling processes run smoothly and efficiently.

      SPIRAC can confidently demonstrate a proven track record built on decades of global project delivery and industry expertise.

      With installations in municipal and industrial facilities across Australia, Europe, the Middle East, the UK, and North America, SPIRAC has successfully delivered thousands of materials handling systems operating in demanding environments such as wastewater treatment plants, pulp and paper mills, food processing facilities, and heavy industry. Its shaftless screw conveyor technology is widely recognised as a benchmark in the industry, with many long-term installations still operating efficiently after years of continuous service. In addition, SPIRAC supports its reputation with documented case studies, repeat clients, and ongoing partnerships with leading engineering firms and utilities—demonstrating consistent performance, reliability, and customer satisfaction across a wide range of applications.

      At SPIRAC, we understand that accurate cost visibility is critical to successful project planning. That’s why our team is ready to provide detailed, transparent quotations tailored to your specific requirements. Whether you’re upgrading existing infrastructure or planning a new installation, we work closely with you to scope your needs and deliver a clear, competitive proposal. With our engineering expertise and practical industry knowledge, you can move forward with confidence—knowing your solution is both technically sound and commercially aligned. Reach out today and let us help you plan with certainty.

      only
      56%
      of domestic wastewater is safely treated worldwide, and we aim to help improve this.
      we serve clients in
      60+
      countries worldwide