Screw conveyor flights do the actual work in every screw conveyor. They transport, mix, meter, or crush the product, thereby determining the throughput, dwell time, and process reliability of an entire system. Therefore, anyone who needs to replace or reorder screw conveyor flights is not making a purely purchasing decision, but a technical one. Geometry, material, and manufacturing quality must match the conveyed material, otherwise wear, downtime, and follow-up costs will increase. The choice of manufacturer determines the component's lifespan and the system's availability.
What are snail wings and what are they used for?
A screw conveyor is a helically wound blade that sits on a shaft and moves material in an axial direction through its rotation. Depending on the geometry and pitch, the same basic structure performs very different tasks: pure conveying, uniform dosing, intensive mixing, or mechanical grinding.
Screw flights are used in almost all process industries. In chemistry, they move aggressive powders and granules; in food production, they transport flours, sugar, animal feed, or meat masses; in energy and environmental technology, they convey ash, sewage sludge, or biomass; and in the raw and basic materials industry, they handle abrasive bulk materials such as sand, cement, or ores. The specific load differs considerably, and this is precisely why there is a demand for custom-made screw flights rather than catalog items.
Which versions does SEGLERdeliver?
SEGLER manufactures screw flights under the product name SPIX, covering the entire spectrum of common and less common designs. Full flights are suitable for classic conveying tasks with fine-grained to medium-grained bulk materials. Ribbon flights are used where material sticks or tends to cake, such as with damp or fibrous products. Thermo flights additionally transfer heat into the conveyed material and are installed in dryers, coolers, or reactors.
For crushing tasks, SEGLER provides saw-tooth blades that break up the product during conveying. Conical blades control pressure and volume along the conveying path, mixing paddles ensure homogeneous mixing, and blades with wear protection extend service life for highly abrasive media. SEGLER also covers special blades, for example, for unusual inclines, split designs, or special connection geometries.
Materials and wear protection
Material selection is often more crucial for screw blades SEGLER than geometry. We process carbon steel for standard applications, stainless steels in A4, Duplex 1.4462, Super Duplex 1.4410, 1.4539, and 1.4547 for corrosive media, and heat-resistant steels such as 1.4828, 1.4841, and 1.4845 for temperatures well above normal operating ranges. For abrasion resistance, wear-resistant steels like Brinar, Hardox, XAR, Raex, and Creusabro are used. Titanium and aluminum are available for special requirements.
Additionally, SEGLER offers several wear protection methods. Hardfacing with tungsten carbides achieves hardnesses up to 70 HRC and is suitable for highly abrasive media. Bolt-on wear segments can be replaced individually in case of maintenance without having to replace the entire blade. Scraper picks remove adhering material from the trough wall and keep the conveying cross-section clear.
Manufacturing Quality and Tolerances
SEGLER manufactures screw flights with outer diameters from 50 mm and wall thicknesses between 2 and 60 mm. Unit weights of up to 12 tons are possible, which also covers large components for heavy-duty applications. Production is carried out according to ISO 2768-1 m and DIN 15261 Part 2, i.e., according to the relevant standards for general dimensional and geometrical tolerances as well as for screw conveyors.
Surface treatments are offered in various grades: grinding, pickling, passivation, and polishing to Ra ≤ 0.4 µm for pharmaceutical or particularly smooth finishes. Food-grade and pharmaceutical-grade variants can be supplied particle-free; 3.1 material certificates according to EN 10204 are part of the standard scope. All manufacturing takes place in-house in Germany. For SEGLER, „Made in Germany“ is not a label but the actual production reality.
When is it worth ordering directly from the manufacturer?
Standard commercially available conveyor components cover simple conveying tasks but quickly reach their limits when the material, geometry, or wear protection deviates from the catalog. Those who want to procure screw flights manufactured to their specifications benefit from several advantages when going directly to the manufacturer: precise design for the conveyed material, a free choice of materials, documented quality through 3.1 certificates and short response times for spare parts.
In maintenance situations, speed counts. SEGLER manufactures replacement and new parts in close coordination with the operator, and can also deliver for complex geometries or unusual materials where dealers might have to decline. For operators, this means less downtime and a reliable technical solution instead of just order processing.
Request snail wings
Send your drawing, a sample, or the operating data directly to SEGLER. You will receive a technically coordinated offer for your screw flights.
More information at our Product page.