Continuous Cold-Rolled Screw Flights

What is a Continuous Cold-Rolled Screw Flight?

A continuous cold-rolled screw flight is a steel spiral component formed from a flat steel strip into a continuous helical shape through a cold-rolling process. It is widely used in screw conveyors and auger systems to efficiently and reliably transport bulk materials such as grain, cement, powder, granules, coal, and sludge.

Seamless Continuous Construction

Manufactured from a single steel strip, ensuring superior strength and durability without welded joints.

Precision Cold-Rolled Forming

Cold-rolling technology guarantees consistent thickness, smooth surfaces, and accurate spiral geometry for optimal performance.

Heavy-Duty Reinforcement

Optional welding and reinforcement ensure the ability to handle high loads and abrasive materials in demanding environments.

Strict Dimensional Accuracy

Rigorous quality checks on straightness, diameter, and pitch ensure reliable performance and uniformity in every flight.

Increased Material Strength

Cold-rolling enhances tensile strength and surface hardness, improving wear resistance and extending service life.

Efficient Material Conveying

The smooth surface and precise spiral pitch reduce friction and material buildup, ensuring efficient conveying performance across various bulk materials.

Auger Shafts Designed for Your Equipments

At Sanwei, all auger shafts are fully custom-designed to suit your equipment and operational needs.

Agricultural Equipment

Augers are widely used in combine harvesters and grain processing equipment to ensure efficient conveying of crops and cereals during harvesting and post-harvest handling.

Combine Harvester

Spiral components used in header, feeder and unloading systems to ensure stable crop and grain conveying during harvesting operations.

Rice Harvester

Spiral flighting applied in rice handling equipment for smooth material transfer throughout harvesting and post-harvest processes.

Grain Handling Equipment

Auger components support continuous feeding, conveying, and material transfer in grain dryers, conveyors, silos, and packaging systems.

Grain Dryers

Auger components designed for continuous grain feeding and discharge under elevated temperature and long operating cycles.

Grain Conveyors

Spiral solutions for horizontal and inclined grain conveying, providing consistent flow and reliable operation.

Bin & Silo Sweep Systems

Heavy-duty spiral components used for residue dleaning and material recovery in silos and storage bins.

Weighing & Packing Systems

Precision spiral parts are applied in controlled feeding and dosing systems for accurate grain packaging.

Industrial & Engineering Equipment

Screw conveyors are used for bulk material handling, drilling support, and discharge processes across various industrial applications.

Drilling & Excavation Machinery

Spiral components used for material lifting, discharge and debris removal in drilling and excavation applications.

Bulk Material Handling Systems

Custom spiral solutions for conveying industrial bulk materials with varying densities and flow characteristics.

Food Processing Equipment

Augers enable uniform conveying and controlled feeding in food processing lines and dosing systems.

Screw Conveyors

Spiral components designed for continuous and uniform material conveying in food processing lines.

Screw Feeders

Customized spiral flighting for controlled feeding applications, supporting stable and repeatable dosing processes.

Environmental & Wastewater Equipment

Screw conveyors are used for transporting, feeding, and dewatering sludge and solid materials in environmental treatment systems.

Sludge Screw Conveyors

Reinforced spiral components suitable for transporting high-moisture and high-viscosity sludge materials.

Screw Press Dewaters

Spiral elements designed for compression and dewatering processes under heavy load conditions.

Sludge Thickening Systems

Spiral components applied to sludge concentration processes, supporting continuous and stable operation.

Feeding Systems

Customized spiral solutions for controlled feeding of sludge and solid waste materials in treatment systems.

Technical Specifications (Updated with True Production Range)

We manufacture continuous screw flights within the following precision boundaries. For requirements exceeding these standard ranges, please consult us.

参数表格

Plate thickness(mm)	Minimum Inner Diameter(mm)	Maximum Outer Diameter(mm)	Maximum Blade Radial Depth(mm)	Pitch-to Diameter Ratio	Diameter Ratio
3.0	20	500	165	0.6-1.3	40
3.5	20	500	165	0.6-1.3	40
4.5	28	500	165	0.75-1.3	40
5.0	28	500	165	0.8-1.3	40
6.0	40	500	165	0.8-1.2	40

Tips 1: If the internal diameter exceeds the minimum by up to 5mm, the external diameter must not be more than three times the internal diameter.

Tips 2: Orders with plate thicknesses outside the specified ranges must have a total weight exceeding 15 tons due to material constraints.

Comprehensive Customization to Match Your Exact Requirements

We don’t offer one-size-fits-all solutions. Every custom screw conveyor flight is engineered to your unique specifications including diameter, pitch, material, and surface treatment, backed by 30+ years of expertise to deliver exactly what your application requires.

Materials

Diameter

Pitch

Thickness

Surface Treatment

Materials

· Q235 Carbon Steel: Standard structural steel for general applications
· Q345 Carbon Steel: Higher strength for heavy-duty conveying
· Wear-Resistant Steel (NM400): Ideal for abrasive materials
· Stainless Steel (304/321/430): Corrosion resistance for chemical or food processing

Diameter

· Outer: 100 mm – 1,200 mm range
· Inner: Minimum 28 mm and above
· Custom sizes available

Pitch

50 mm – 300 mm standard range | custom specifications supported

Thickness

3 mm – 12 mm (standard: 3.0, 3.5, 5.0, 6.0mm, or custom thickness)

Surface Treatment

· Anti-corrosion coatings: For protection in harsh, corrosive environments
· Wear-resistant hard-facing: For extreme abrasion and heavy-duty demands
· Custom for your needs

Send us your drawings or specifications, and we will manufacture precisely to your requirements.

Where Our Continuous Screw Flights Work

Agricultural Machinery

Grain augers, combine harvesters

Bulk Material Conveyors

Feed, fertilizer, coal, sand conveyors

Wastewater Treatment Equipment

Sludge handling screw convoyers

Industrial Conveyors

Cement, mining, chemical processing

Why Partner Sanwei as Your Screw Conveyor Components Company?

From application review and design support to production, inspection, packaging, and delivery, Sanwei helps simplify sourcing and reduce coordination effort.

Dimensions, materials, and structures can be tailored to OEM and non-standard needs, ensuring screw conveyor components match real operating conditions.

Dedicated CNC machining, forming lines, and straightness inspection equipment support heavy-duty, long-length screw flight production.

ISO 9001–certified processes and full-stage inspections ensure consistent performance, durability, and long service life of every component.

Sample lead times are short, with in-stock samples ready in as fast as 3 days and new samples in about one week. Standard screw flights are typically delivered within 2–4 weeks.

A 12-month warranty, 24/7 service support, and professional engineering consultation are provided to support long-term and reliable operation.

Need More Help? Contact Us

Frequently Asked Questions

What material is used for continuous cold-rolled flights?

SPHC carbon steel, the optimal grade for continuous cold-rolling and long-term conveyor performance.

What is the maximum outer diameter?

For continuous cold-rolled flights, the standard maximum outer diameter is 600 mm. Custom sizes available beyond this range.

What is the smallest inner diameter?

Minimum 28 mm. Custom specifications are fully supported.

Which thicknesses are available?

Standard options: 3.0, 3.5, 4.5, 5.0, 6.0 mm. Custom thicknesses up to 12 mm for heavy-duty applications.

Can you provide replacement flights for existing equipment?

Yes, we manufacture based on your drawings, dimensions, or specifications to ensure seamless compatibility.

Can flights be integrated into complete screw conveyor assemblies?

Yes, flights can be welded onto auger shafts for fully balanced, ready-to-install systems.