Screw coil O-300 thickness 4mm

Manufacturing of Auger Flighting Ø 300 mm with 4 mm Thickness

Transportation of bulk materials by screw conveyors is always accompanied by friction, but when working with highly abrasive or heavy raw materials, the wear of working organs reaches critical proportions. Transshipment of mineral fertilizers, cement, sand, ash, fuel pellets, or wet soybeans with soil impurities leads to critical thinning of the standard metal profile, loss of its geometry, and premature equipment failure in a relatively short time. In such cases, to avoid constant emergency stops and expensive repairs, the conveyor requires parts with increased wear resistance.

For systems of medium and high productivity, the basic solution is the professional manufacturing of auger flights from thick-plate steel. The initial reinforced standard in this category for a 300 mm diameter is a metal thickness of 4 mm, which provides a certain safety margin for most intensive tasks. At the same time, for more aggressive operating conditions where such thickness may be insufficient, the production facilities of the Zavod Moroza allow for the manufacturing of auger flights with thicknesses of 6, 8, and even up to 16 mm, guaranteeing the maximum operational resource of the working organ.

Auger Flight Manufacturing Technology with Thickness Preservation

Quality bending of 4 mm or thicker steel into a correct spatial spiral is a rather complex engineering task. Most mass productions use cold rolling technology to create a continuous (seamless) spiral by passing a steel strip through special rollers. To force a straight strip to twist around an axis, the equipment must strongly compress and elongate its outer edge; due to this rolling specificity, the profile thickness is distributed extremely unevenly: if it is the declared 4 mm at the base, the metal splashes out and thins almost by half at the outer, most loaded edge, which becomes a critical drawback for working with abrasive raw materials.

Zavod Moroza uses a fundamentally different approach—production from individual segments using the method of step-by-step spatial forming. First, a flat ring blank is cut on a CNC machine, already having the precise outer and inner diameter, and then we locally bend the metal on a hydraulic press, setting the required pitch. Since the profile is not subjected to aggressive compression by rolling rollers, each flight retains its original honest 4 mm thickness across the entire surface, which guarantees maximum wear resistance of the vital outer edge and extends the overall resource of the conveyor.

Moreover, the problem of a solid-rolled spiral is not limited to the loss of thickness alone, as the rolling process creates high internal stress in the metal. Due to the "spring-back" effect, such a spiral is extremely difficult to mount onto the central shaft, and mechanics have to apply forced fitting using winches, jacks, or thermal heating. As a result, weld seams are applied to metal that is already under critical tension, and during the conveyor's operational vibrations and loads, such seams often fail and crack. In contrast, an auger flight manufactured by our plant in the form of an individual segment fits perfectly with the supporting pipe in an absolutely free state without any forced stretching, which guarantees easy installation and greater reliability of the welded joint even during extreme loads.

Protection Against Compaction and Jamming

Transportation of wet or sticking-prone materials (for example, mineral fertilizers, wet sand, or soil) creates extreme resistance inside the conveyor pipe. During movement, such raw materials often compact and attempt to clog the technological gap between the working organ and the housing, leading to a pressing effect and a high risk of total mechanism jamming. If a thin or rolling-deformed spiral operates in such aggressive conditions, its profile begins to spring and bend back under the pressure of the heavy mass, ultimately disrupting flow stability.

That is why professional manufacturing of auger flights from thick-plate metal becomes the only reliable solution to this mechanical problem. The high structural rigidity of the 4 mm profile eliminates segment deformation even during peak loads. Additionally, thanks to the perfectly smooth outer edge obtained in the process of step-by-step bending without stretching, the assembled auger maintains a minimal and stable gap with the pipe walls along its entire length, which simply leaves no space for the heavy material to stick or press—the raw material is sheared and moves forward uniformly without creating critical resistance on the motor.

Reliability of Auger Flight Welded Joints

High-quality installation of a reinforced working organ is impossible without a perfect fit of the parts, and welding 4 mm steel requires deep penetration so that the seam can withstand high torques during the startup of a loaded conveyor. Thanks to the high precision of our step-by-step spatial bending, the inner diameter of each segment perfectly matches the size of the supporting shaft—this ensures a tight fit without technological gaps or misalignments. Under such conditions, a welder has the opportunity to apply a smooth, monolithic, and strong seam without the risk of metal burn-through or the formation of weak spots, which reliably protects the flight from tearing off even when starting a fully loaded conveyor.

Contact the Zavod Moroza

Zavod Moroza manufactures the same auger flights it constantly uses in the production of its own equipment and machinery; therefore, we have a thorough understanding of all the nuances of their operation and endurance. Since the 300x4 mm reinforced profile is our standard serial item, we constantly maintain a ready stock of these elements. This approach allows agricultural and industrial enterprises to promptly receive a reliable product without delays while waiting for individual manufacturing. Contact our sales department to coordinate details and quickly arrange the shipment of the required batch from stock or order its prompt manufacturing directly at the plant.