Continuous spirals

Shaftless spirals from two flat bars

Shaftless spirals from flat bars are made together to form double spiral.

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Steel spirals – also known as metal spirals, continuous flighting, or shaftless spirals – are essential components in a wide range of industrial material handling systems. At Steel Spirals, we manufacture these products using our proprietary forming technology, allowing us to maintain full control over precision, quality, and repeatability.

Thanks to our flexible production process, we can offer spirals in a wide range of diameters, thicknesses, and pitch configurations – from compact flights for lighter-duty applications to robust, heavy-duty spirals designed for abrasive or high-load environments. Each spiral is produced from flat steel bar and tailored to the customer’s exact specifications. To ensure a perfect fit, we require details such as outer diameter, inner diameter, pitch, thickness, material type, and whether the spiral will be mounted on a shaft or used in a shaftless system – as this determines the forming priority. We offer several spiral configurations, including single-bar spirals with constant thickness, double-bar spirals welded together for added strength, and tapered spirals produced from strip steel with variable cross-sections, compliant with international standards.

Our spirals are used in screw conveyors, drilling equipment, compactors, and other systems requiring continuous movement of bulk or semi-solid materials. They are widely deployed in construction, agriculture, wastewater treatment, energy, wood processing, pharmaceuticals, chemicals, and heavy industry. Whether you need a standard spiral or a completely custom solution, Steel Spirals is ready to deliver – with the technical know-how, modern production capabilities, and customer focus to support your application from start to finish.