Screw rotor with ribbon flights

Screw rotor with ribbon flights Ø1520. BEMA has manufactured the screw flights and mounted the ribbon flights to innerpipe before it was shipped to client.

What is the reason for using ribbon flights?

1. A screw auger with ribbon screw flights are used when the transported material is sticky
2. The material can flow round the holes between the ribbons

What is the difference between ribbon flights and paddles?

1. When using paddles the material flow is broken between the paddles and mixed because new material push on the stopped material
2. Screw augers with ribbon screw flights do not stop the material flow, but create a back-flow of the material in the windows between the ribbons

You can always contact BEMA and discuss which type could be used in your application. We have years of experience, but we must honestly state, that we learn new sides of screw transporting material every day. See another example of a screw rotor with ribbon screw flights Manufacturing ribbon screw flights require a more detailed design compared to a standard cylindrical screw flight. Mounting  ribbon sectional flight to the inner tube of the screw rotor is more time consuming. You shall therefor expect a longer planning time and a longer lead time for production. In BEMA we consider ribbon screw flights “special” screw flights, and we use an effort to design them, so they are as good as possible for easy mounting to the inner tube with the goal to get the best possible result for the ribbon screw rotor.

FAQ – Screw Rotor with Ribbon Flights

1. What is a screw rotor with ribbon flights used for?

A screw rotor with ribbon flights is designed for transporting sticky or cohesive materials. The open spaces between the ribbon flights allow the material to flow freely without clogging, making this design ideal for applications where standard cylindrical screw flights would struggle.

2. How do ribbon flights differ from paddles?

Ribbon flights maintain a continuous material flow, creating a controlled back‑flow through the openings between the ribbons. Paddles, on the other hand, interrupt the flow and mix the material by pushing new material into stopped material. The choice depends on the material characteristics and the desired process outcome.

3. Why choose ribbon flights for sticky materials?

Sticky materials tend to adhere to solid surfaces, causing blockages in traditional screw designs. Ribbon flights reduce contact surfaces and allow the material to move around the open sections, preventing buildup and ensuring smooth, reliable transport. This makes them especially effective for challenging bulk materials.

4. What should be considered during design and production?

Ribbon flights require more detailed engineering than standard screw flights. Mounting them to the inner tube is more time‑consuming, and both planning and production lead times are longer. BEMA treats ribbon flights as “special” components and invests extra effort to ensure optimal fit and performance.

5. Can BEMA help determine the right screw flight type?

Yes. BEMA has extensive experience with screw transport solutions and can advise on whether ribbon flights, paddles, or standard flights are best suited for your material and application. Their team continuously learns from new cases and real‑world challenges.