Shaftless Screw Conveyor

 

 

 

 

 

A Shaftless Screw Conveyor is a mechanical conveying system designed to transport sludge, solids, and bulk materials using a rotating spiral without a central shaft. Unlike traditional screw conveyors that rely on a rotating screw mounted around a shaft, shaftless conveyors use a heavy-duty spiral that rotates freely inside a U-shaped trough. The absence of a central shaft creates several important advantages:

 

Larger Conveying Space

Without a center shaft occupying the internal space, materials can move more freely through the conveyor. This makes shaftless screw conveyors ideal for:

● Sticky sludge

● High-moisture materials

● Fibrous waste

● Stringy materials

 

Reduced Material Wrapping

Traditional shafted conveyors may experience materials wrapping around the shaft, causing blockage and maintenance issues. The shaftless design eliminates this problem, improving reliability and reducing downtime.

 

Better Handling of Difficult Materials

Shaftless screw conveyors are especially effective for materials that are difficult to transport using conventional systems. Typical materials include:

● Sewage sludge	● Dewatered sludge cake	● Screenings	● Food waste
● Paper pulp	● Biomass	● Industrial residues

 

Compact and Flexible Installation

The enclosed trough design allows installation in:

● Horizontal layouts

● Inclined systems

● Limited-space facilities

● Integrated treatment systems

 

Main Components

A typical shaftless screw conveyor consists of:

1. Heavy-duty shaftless spiral	3. Wear-resistant liner	5. Inlet hopper	7. Supporting structure
2. U-shaped conveyor trough	4. Gear motor drive system	6. Discharge outlet	8. Control system

Together, these components provide continuous, efficient, and low-maintenance material transportation.

 

 

 

A Shaftless Screw Conveyor is a highly efficient mechanical conveying system specifically designed to transport sticky, wet, fibrous, and irregular materials that are difficult to handle with conventional shafted screw conveyors. It is widely used in wastewater treatment plants, industrial processing facilities, recycling centers, and solid waste handling systems. Unlike traditional screw conveyors, a shaftless screw conveyor eliminates the central shaft and uses a heavy-duty shaftless spiral rotating inside a U-shaped trough lined with wear-resistant material. This innovative design significantly reduces material wrapping, clogging, and maintenance while increasing conveying capacity. The conveying process consists of the following steps:

 

Step 1: Material Feeding

The material enters the conveyor through the inlet hopper or feed chute. Typical materials include:

● Dewatered sludge	● Municipal sewage sludge	● Screenings from rotary drum screens
● Organic waste	● Food processing waste	● Paper pulp
● Textile fibers	● Biomass residues	● Industrial solid waste

The open shaftless design allows bulky and irregular materials to enter smoothly without bridging or blockage.

 

Step 2: Spiral Rotation

A gear motor drives the shaftless spiral at a controlled speed. As the spiral rotates inside the trough, friction between the material and the spiral continuously pushes the material forward toward the discharge outlet.

Unlike shafted conveyors, there is no center shaft restricting material flow. Advantages include:

● Larger conveying volume	● Higher transport efficiency
● Reduced resistance	● Improved handling of high-moisture materials

 

Step 3: Material Conveying

The rotating shaftless spiral continuously transports materials along the conveyor. The wear-resistant liner installed inside the trough supports the spiral while minimizing friction and extending equipment life. Even difficult materials such as:

● Long fibers

● Sticky sludge

● Stringy waste

● Plastic strips

● Food residues

can be conveyed efficiently without wrapping around rotating components.

 

Step 4: Material Discharge

The conveyed material reaches the discharge outlet and is transferred to the next processing stage. Typical discharge destinations include:

● Sludge storage hoppers	● Screw press dewatering machines	● Incineration systems	● Landfill containers
● Drying equipment	● Composting systems	● Waste transportation trucks

The process operates continuously, making shaftless screw conveyors ideal for automated wastewater treatment plants.

 

 

 

 

 

Many engineers compare shaftless and shafted screw conveyors when selecting material handling equipment. Understanding their differences helps ensure the best choice for each application.

 

Which Conveyor Is Better?

A shaftless screw conveyor is the preferred choice for wastewater treatment and sludge handling because it minimizes clogging and handles difficult materials with ease.

A shafted screw conveyor is better suited for dry, free-flowing materials such as cement, grain, sand, and powders where a center shaft does not interfere with material flow.

 

 

 

BioCell Shaftless Screw Conveyors are engineered to deliver exceptional reliability, high conveying efficiency, and reduced maintenance costs in challenging operating environments.

 

Clog-Free Shaftless Design

The absence of a center shaft eliminates the primary cause of material wrapping and blockage. This allows the conveyor to transport:

● Sticky sludge

● Long fibers

● Organic waste

● Screenings

● High-moisture solids

 

Excellent Performance with Difficult Materials

Unlike conventional conveyors, BioCell Shaftless Screw Conveyors maintain smooth operation even when handling materials that are:

● Wet

● Sticky

● Fibrous

● Irregularly shaped

● Abrasive

This versatility makes them ideal for municipal and industrial wastewater treatment.

 

High Conveying Efficiency

The open spiral design increases the effective conveying area, enabling larger material volumes to be transported with lower energy consumption. Benefits include:

● Improved productivity

● Faster material transfer

● Reduced operating costs

 

Heavy-Duty Spiral Construction

Manufactured from high-strength alloy steel, the shaftless spiral offers excellent resistance to wear, fatigue, and deformation, ensuring reliable long-term operation in demanding applications.

 

Low Maintenance Requirements

With fewer moving parts and no center shaft to trap materials, maintenance is significantly reduced. Routine service mainly includes:

● Inspecting the spiral

● Checking the liner condition

● Lubricating bearings

● Verifying motor performance

This minimizes downtime and lowers lifecycle costs.

 

Wear-Resistant Liner System

Replaceable liners protect the trough from abrasion while reducing friction between the spiral and the trough. Advantages include:

● Longer equipment lifespan

● Reduced replacement costs

● Easier maintenance

 

Corrosion-Resistant Construction

BioCell offers SS304 and SS316 stainless steel options for corrosive wastewater environments, ensuring long-term durability and reliable performance.

 

Fully Enclosed Operation

Optional covers prevent:

● Odor emissions

● Dust generation

● Material spillage

● Environmental contamination

This improves workplace safety and supports environmental compliance.

 

Flexible Installation

BioCell Shaftless Screw Conveyors can be configured for:

● Horizontal conveying

● Inclined conveying

● Vertical conveying

● Indoor installations

● Outdoor installations

This flexibility allows seamless integration into new or existing treatment systems.

 

Intelligent Automation

Optional PLC control, VFD speed regulation, remote monitoring, and SCADA integration enable intelligent operation, improved process control, and reduced manual intervention.

 

Customized Engineering Solutions

Every project is unique. BioCell provides tailored conveyor designs based on material characteristics, conveying distance, installation conditions, and process requirements. From compact units for small treatment plants to heavy-duty systems for large industrial facilities, our engineering team delivers optimized solutions that maximize performance and long-term value.

 

 

 

BioCell Shaftless Screw Conveyors are designed to provide reliable and efficient conveying solutions for challenging materials, including sludge, screenings, fibrous waste, and high-moisture solids. With a robust shaftless spiral design, corrosion-resistant materials, and customizable configurations, BioCell conveyors meet the demanding requirements of municipal wastewater treatment plants and industrial applications worldwide.

 

The following specifications represent typical design capabilities. Customized solutions are available according to material characteristics, conveying capacity, installation conditions, and project requirements.

 

Model	Flowrate (m³/h)	Power (KW)	A (mm)	B (mm)	H (mm)	L1 (mm)	L2 (mm)	Recommended Length L(mm)	Installation Angle
LSY260	2.2	1.1~1.5	260	370	270	150	600	≤12	≤30°
LSY320	5.5	1.5~2.2	320	430	340	200	700	≤15	≤30°
LSY355	8	2.2~3.0	355	465	380	250	800	≤15	≤30°
LSY420	11	3.0~5.5	420	530	430	250	800	20	≤30°

 

Customized Technical Design

BioCell provides engineering customization according to:

Conveying Material	Conveying Capacity	Installation Conditions
Different materials require different conveyor designs. We evaluate: ● Moisture content ● Density ● Viscosity ● Abrasiveness ● Fiber length ● Particle size ● Corrosion characteristics	The conveyor size is customized based on: ● Required throughput ● Operating hours ● Upstream equipment capacity ● Peak material loading	BioCell can design conveyors according to: ● Available installation space ● Conveyor length ● Height difference ● Existing equipment layout ● Civil construction requirements

 

 

 

Shaftless Screw Conveyors are widely recognized as one of the most reliable solutions for transporting difficult materials. Their unique shaftless spiral design allows them to handle sticky, wet, and fibrous materials that traditional conveyors often struggle with.

BioCell Shaftless Screw Conveyors are widely applied in the following industries:

 

1. Municipal Wastewater Treatment

Municipal wastewater treatment plants generate large quantities of sludge and screening residues that require efficient transportation.

Typical applications include:	Benefits:	BioCell conveyors are commonly integrated with:
● Transporting dewatered sludge cake ● Moving screenings from mechanical screens ● Feeding sludge drying systems ● Transferring waste to containers	√ Prevents sludge blockage √ Handles high-moisture materials √ Reduces manual handling √ Improves plant automation	● Rotary Drum Screens ● Screw Press Sludge Dewatering Machines ● MBBR Treatment Systems

 

2. Industrial Wastewater Treatment

Industrial wastewater often contains challenging solids such as fibers, organic residues, and process waste.

Applications include:	Advantages:
● Chemical wastewater plants ● Pharmaceutical wastewater ● Manufacturing facilities ● Industrial recycling systems	● Corrosion-resistant construction ● Stable operation ● Customized material selection

 

3. Food Processing Industry

Food production generates sticky and organic waste materials that require hygienic and reliable transportation.

Applications include:	Benefits:
● Meat processing waste ● Vegetable residues ● Fruit pulp ● Food sludge ● Organic by-products	● Handles wet materials effectively ● Reduces material loss ● Supports automated production lines

 

4. Pulp & Paper Industry

Paper manufacturing produces large amounts of fibrous waste and pulp residues. Shaftless Screw Conveyors are used for:

● Paper sludge transportation

● Fiber recovery systems

● Waste pulp conveying

The shaftless design prevents long fibers from wrapping around the conveyor system.

 

5. Textile Industry

Textile factories generate wastewater containing:

● Fabric fibers

● Yarn waste

● Textile residues

BioCell Shaftless Screw Conveyors provide reliable transportation of fibrous materials without frequent clogging.

 

6. Solid Waste Management

Applications include:	The conveyor effectively handles:
● Municipal solid waste facilities ● Recycling plants ● Organic waste treatment	● Screenings ● Packaging waste ● Compost materials ● Biomass residues

 

7. Agricultural & Biomass Processing

Suitable for conveying:

● Agricultural waste

● Straw materials

● Biomass fuel

● Organic residues

The shaftless design provides excellent performance with lightweight but fibrous materials.

 

 

 

Choosing the correct shaftless screw conveyor is essential for achieving stable operation, minimizing maintenance, and maximizing equipment lifespan. The following factors should be carefully evaluated before purchase.

 

1. Identify the Conveying Material

The first step is understanding the material properties. Important characteristics include:

Moisture Content	Wet sludge requires a different design compared with dry materials.
Viscosity	Sticky materials benefit from a shaftless structure because it reduces material accumulation.
Fiber Content	Long fibers, textiles, and organic materials can easily wrap around traditional conveyors.
Abrasiveness	Highly abrasive materials require stronger spiral materials and wear-resistant liners.

 

2. Determine Required Conveying Capacity

Capacity calculation depends on:	An undersized conveyor may cause:
● Material density ● Feeding rate ● Operating time ● Conveyor diameter ● Spiral speed	● Material accumulation ● Overflow ● Reduced efficiency

An oversized system may increase unnecessary investment and energy consumption.

 

3. Consider Conveyor Length and Layout

Important design factors include:

● Horizontal distance

● Vertical lifting requirements

● Installation angle

● Available space

BioCell engineers can optimize conveyor dimensions according to your facility layout.

 

4. Select Proper Material Construction

Material selection directly affects equipment durability.

SS304 Stainless Steel	SS316 Stainless Steel
Suitable for: ● Municipal wastewater ● Food processing ● General industrial applications	Recommended for: ● Chemical wastewater ● Marine environments ● High-corrosion applications

 

5. Evaluate Maintenance Requirements

A good shaftless screw conveyor should provide:

● Easy access

● Replaceable wear liners

● Reliable drive components

● Simple inspection procedures

BioCell designs conveyors for long service life with minimal downtime.

 

 

 

Before selecting a supplier, international buyers should prepare the following information:

Material Information	Capacity Requirements	Installation Requirements
Provide: ● Material name ● Moisture percentage ● Density ● Temperature ● Particle size ● Corrosion characteristics	Confirm: ● Required conveying capacity (m³/h) ● Daily operation hours ● Peak loading conditions	Consider: ● Conveyor length ● Inclination angle ● Available space ● Indoor or outdoor installation
Automation Requirements	Environmental Requirements
Determine whether you need: ● Manual operation ● Automatic start/stop control ● PLC integration ● Remote monitoring	For harsh environments, consider: ● Stainless steel construction ● Waterproof motors ● Corrosion protection ● Outdoor protection covers

 

 

To meet different industrial requirements, BioCell provides various optional configurations.

1. Material Options	2. Conveyor Design Options	3. Drive System Options
Available materials include: Carbon Steel Suitable for ● General industrial applications; ● Dry materials; ● Cost-sensitive projects   SS304 Stainless Steel Suitable for ● Wastewater treatment; ● Food industry; ● General corrosion environments   SS316 Stainless Steel Suitable for ● Chemical wastewater ● Marine applications ● Highly corrosive environments	BioCell provides: ● Horizontal Shaftless Screw Conveyor ● Inclined Shaftless Screw Conveyor ● Vertical Shaftless Screw Conveyor ● Custom Multi-Discharge Conveyor ● Compact Integrated Conveyor System	Available options: ● Standard gear motor ● Variable Frequency Drive (VFD) ● Energy-efficient motor ● Explosion-proof motor ● Customized electrical standards
4. Control System Options	5. Additional Accessories	6. Integrated Wastewater Treatment Package
Customers can choose: ● Manual control panel ● PLC automatic control ● Touch screen HMI ● SCADA integration ● Remote monitoring system	Optional accessories include: ● Protective covers ● Inspection openings ● Level sensors ● Overflow protection ● Spray cleaning system ● Customized inlet hopper ● Customized discharge chute	For complete wastewater solutions, BioCell can combine the Shaftless Screw Conveyor with: ● Rotary Drum Screen ● Screw Press Sludge Dewatering Machine ● MBBR Integrated Wastewater Treatment Equipment ● MBBR Bio Media ● Media Retention Screen This integrated approach helps customers simplify procurement, reduce installation complexity, and achieve better overall system performance.

 

 

 

At BioCell, we understand that different industries have different conveying challenges. Sludge characteristics, material properties, installation conditions, and process requirements can vary significantly from one project to another. A standard conveyor design is not always the best solution. As a professional Shaftless Screw Conveyor Manufacturer, BioCell provides comprehensive OEM and ODM manufacturing services for wastewater treatment companies, environmental engineering contractors, system integrators, and global distributors.

 

From initial engineering consultation to final production and delivery, BioCell supports customers with customized solutions designed for reliable performance, easy integration, and long service life.

 

OEM Manufacturing Services - Manufacturing According to Your Technical Requirements

BioCell provides flexible OEM production based on customer specifications, drawings, and project requirements. OEM customization includes:

Customized Conveyor Dimensions	We can customize: ● Conveyor diameter ● Conveyor length ● Spiral thickness ● Trough dimensions ● Installation height ● Inclination angle ● Discharge position This ensures the conveyor fits perfectly into your existing wastewater treatment system or production line.
Customized Material Selection	Different applications require different construction materials. Available options: ● SS304 Stainless Steel Recommended for: Municipal wastewater treatment; Food processing; General industrial applications ● SS316 Stainless Steel Recommended for: Chemical wastewater; Marine environments; High-corrosion applications ● Carbon Steel Suitable for: General industrial material conveying; Cost-effective projects
Customized Drive Systems	BioCell provides different drive solutions according to application requirements: ● Standard gear motor ● High-efficiency motor ● Variable frequency drive (VFD) ● Explosion-proof motor ● Customized voltage and frequency
Customized Control Systems	Available automation solutions include: ● Manual control ● PLC automatic control ● Touch screen HMI ● SCADA integration ● Remote monitoring These options help customers achieve intelligent and automated operation.

 

ODM Design Services - Complete Engineering Support from Concept to Production

For customers who need a complete product solution, BioCell provides ODM services including:

● Product design	● Mechanical engineering	● Structural optimization	● 3D modeling
● Technical drawings	● Prototype development	● Performance testing	● Production support

 

Our engineering team evaluates:

● Material characteristics

● Conveying capacity

● Installation conditions

● Environmental requirements

to develop the most suitable shaftless screw conveyor solution.

 

 

 

 

 

Whether you are upgrading a wastewater treatment plant, designing a new industrial facility, or sourcing reliable environmental equipment for your market, BioCell provides customized Shaftless Screw Conveyor solutions engineered for performance, durability, and long-term value.

 

With professional wastewater treatment expertise, advanced manufacturing capabilities, and global project experience, BioCell helps customers solve challenging sludge and solid material conveying problems efficiently.

Request Your Customized Shaftless Screw Conveyor Solution Today

Send us your project details and receive:

● Equipment recommendation

● Technical specifications

● Customized drawings

● Project consultation

● Factory quotation

 

BioCell is ready to provide the right conveying solution for your wastewater and industrial applications. Contact BioCell today and build a more efficient, reliable, and automated material handling system.