Trough Screw Conveyors for Abrasive Materials

Trough screw conveyors for use in the transport of abrasive materials in an industrial application.

An industrial customer faced a significant challenge in their production line. They handled a material with extremely high abrasiveness, which over time degraded their existing conveying systems. Previous solutions suffered from frequent downtime, high maintenance costs, and unacceptable wear on both the screw flights and the trough.

The customer required a reliable, long-lasting, and service-friendly solution capable of withstanding constant mechanical stress without compromising capacity or safety.

Key design features of the trough screw conveyors

• Large diameter of the trough screw conveyor
  Diameter of Ø800 ensures high capacity
• Robust trough construction
  The trough is manufactured in 6 mm plate thickness
• Screw rotors with Hardox wear edges
  The screw rotors are equipped with Hardox wear edges, which significantly increase service life under abrasive conditions
• Service-friendly design
  A coupling is installed between the screw rotor and gearbox
• Industrial bearing design
  Spherical roller bearings are used to ensure axial support of the screw rotor

BEMA designed the trough screw conveyors in collaboration with the customer. They are manufactured to be directly installed in the customer’s plant.

In the design of trough and other screw conveyors, BEMA focuses on:

• Design for long service life
• Use of gear motors and bearings suitable for the application
• Full product documentation:
  • Drawings with bill of materials always included
  • EU Declaration of Incorporation for the machine
  • Datasheets for wear parts to ensure easy reordering of spare parts

BEMA has its own engineering department, capable of adapting the design of trough screw conveyors to the specific requirements of each application.

Results for the customer

• Significantly extended service life
  Hardox wear edges and reinforced construction dramatically reduced wear
• Reduced maintenance
  Service intervals were extended, and downtime was significantly reduced
• Stable and predictable operation
  The new trough screw conveyor handles abrasive material without capacity loss or blockages
• Lower total cost of ownership (TCO)
  The investment quickly paid off through reduced maintenance and increased uptime

Why did the customer choose BEMA?

• Proven experience with abrasive materials
• Ability to deliver custom-designed screw conveyor solutions
• Focus on operational reliability, service life, and quality
• Manufacturing in robust materials such as Hardox and stainless steel
• Close dialogue and technical support throughout the project

FAQ: Trough Screw Conveyors for Abrasive Materials

What are trough screw conveyors used for with abrasive materials?

Trough screw conveyors are used to transport highly abrasive materials in industrial processes. When materials cause significant wear, a robust solution is required to ensure stable operation without frequent downtime or capacity loss. BEMA’s trough screw conveyors are specifically developed for such demanding conditions.

Which design elements increase service life?

The conveyor features a large Ø800 diameter for high capacity and a trough made from 6 mm thick steel. The screw rotors are equipped with Hardox wear edges, significantly reducing wear and extending service life. Additionally, spherical roller bearings are used for optimal axial support.

How are serviceability and operational reliability ensured?

The design includes a coupling between the gearbox and screw rotor, making service easier and reducing downtime. The entire construction is developed with a focus on long service life, minimal maintenance, and stable operation – even under constant mechanical stress from abrasive materials.

What documentation and support are included?

BEMA provides full documentation, including drawings, bills of materials, EU Declaration of Incorporation, and datasheets for wear parts, ensuring easy spare part reordering. The design is also customized to meet the customer’s specific requirements through close technical collaboration.