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A screw conveyor (also called an auger conveyor) is a mechanical system used to transport bulk materials such as powders, granules, and semi-solid substances by rotating a helical screw blade inside a tube or trough.
The rotating screw pushes material forward in a continuous motion, allowing controlled and enclosed material transfer. It is widely used in industrial production because it is compact, reliable, and suitable for horizontal, inclined, and vertical conveying.
A screw conveyor works by rotating a helical screw inside a fixed housing. As the screw rotates, material is pushed forward along the conveyor trough from the inlet to the discharge point.
The conveying speed depends on screw diameter, pitch, rotational speed, and material properties.
Screw conveyors are used to transport and meter bulk materials in industries such as:
Cement and construction materials
Mining and mineral processing
Food processing (flour, sugar, grains)
Chemical powder handling
Waste treatment and sludge handling
Industrial automation production lines
Also known as: Auger Conveyor, Helical Conveyor
Function: Bulk material transport and dosing
Motion type: Rotating helical screw
System type: Enclosed conveying system
Installation: Horizontal / Inclined / Vertical
Material types: Powder, granules, sludge, semi-solid
A screw conveyor consists of:
A rotating screw shaft
Helical flight (spiral blade)
U-trough or tubular housing
Drive motor and gearbox
Inlet and outlet ports
Support bearings and sealing system
When the motor drives the shaft, the screw rotates and moves material forward through internal friction and displacement.
This design allows both transport and controlled feeding (dosing) in industrial systems.
Used for stable, continuous material transfer.
Used for elevation between different levels.
Used for compact vertical lifting systems.
Used for heavy-duty and high-load applications.
Used for sticky, wet, or viscous materials.
When selecting a screw conveyor, engineers consider:
Material density
Particle size
Moisture content
Abrasiveness
Required capacity (m³/h)
Conveyor length
Inclination angle
Discharge control requirements
Carbon Steel (Q235 / Q355 / ASTM A36)
Stainless Steel 304
Stainless Steel 316
Abrasion-resistant steel (optional)
Food-grade polished stainless steel
Fully enclosed design reduces dust leakage
Compact structure saves space
Easy integration into production lines
Supports dosing and metering
Low maintenance requirements
Customizable for different industries
Suitable for harsh environments
Reliable continuous operation
| Screw Conveyor | Belt Conveyor |
|---|---|
| Enclosed system | Open system |
| Better for powders | Better for large bulk solids |
| Compact design | Requires more space |
| Dosing capability | Limited dosing control |
| Lower throughput | Higher throughput |
Cement plants
Mining systems
Chemical plants
Food production lines
Grain handling systems
Wastewater treatment
Plastic production
Industrial batching systems
Engineering design
Material preparation
Screw flight forming
Shaft welding
CNC machining
Dynamic balancing
Assembly
Surface treatment
Performance testing
Final inspection
They are widely used in cement, food, mining, chemical, and wastewater industries for continuous material handling.
Yes. Shaftless screw conveyors are especially suitable for sticky or wet materials.
They refer to the same mechanism. “Auger” is more common in agriculture, while “screw conveyor” is used in industrial engineering.
Yes. Diameter, length, material, capacity, and drive system can all be customized.
Looking for a custom screw conveyor manufacturer?
MetalKeen provides OEM screw conveyor systems including engineering design, fabrication, screw flight manufacturing, shaft machining, assembly, and testing. We deliver solutions for powder handling, bulk material transport, and industrial automation systems tailored to your production requirements.
