What Is a Shaftless Screw Conveyor?
A shaftless screw conveyor which Is also known as a shaftless spiral conveyor or flexible auger conveyor that is an advanced material handling system engineered to move sticky, viscous or fibrous materials that tend to clog or wrap around a traditional shafted screw. Unlike conventional screw conveyors, the shaftless design eliminates the central shaft, allowing the spiral to rotate freely within a fully enclosed U-trough or tube.
The conveyor which manufactured by a chinese manufacturer Hebei OuTai Environmental Protection Equipment Co., Ltd. This innovative structure provides smooth including continuous and clog-free transportation of challenging materials such as wastewater sludge, food waste, biomass and industrial residues. Our xLS Series Shaftless Screw Conveyors are widely recognized for delivering higher efficiency with reliability and easy maintenance in harsh operating environments.
Some cause of Choosing Shaftless Screw Conveyor
You should choose shaftless screw conveyor because choosing a shaftless screw conveyor ensures seamless handling of difficult materials that bind and wrap or compact in traditional conveyors. Its key benefits include:
No center shaft –and no clogging: The conveyor is best for sticky and fibrous materials such as sludge, pulp and municipal solid waste.
Higher capacity and efficiency: This special edition Offers 1.5 times the throughput of shafted models.
Reduced maintenance: For maintainance part it have fewer moving parts with no intermediate bearings and self cleaning spiral operation.
Fully enclosed transport: The conveyor Prevents leakage, odor emissions and contamination.
Energy-saving design: This design operates with low power input and higher torque for heavy-duty applications.
Senotay have CE and ISO 9001:2015 certified systems assure durable, safe and environmentally friendly performance.
Technical Specification Table
Physical Dimensions | Performance Ratings | Material & Construction | Operational Data | Certifications & Lifecycle |
Length: 2,000–40,000 mm | Operating Pressure: 0.3–1.0 Bar | SS304 / SS316 / Mn Steel | 180–450 Nm | 18,000–25,000 hrs |
Trough Width: 260–1,200 mm | Max Pressure: 1.5 Bar | Carbon Steel / SS304 | 45–120 kg/m | 8–15 months |
Trough Height: 300–1,500 mm | Operating Temp: 0–60 °C | UHMW-PE / Hardox | 8–16 holes, Ø18–24 mm | Up to 1,000 cycles/year |
Flange Size: Ø200–Ø800 mm | Max Temp: 120 °C | SS304 / CS with coating | 2–6 reinforced points | ISO 9001 / CE / GB/T 10595 |
BCD: Ø160–Ø750 mm | Capacity: 3–90 m³/h | 20–35 mm | 1.5–22 kW | ANSI / ASME B20.1 |
Inlet Opening: 200–700 mm | Conveying Efficiency: 85–92 % | NBR / EPDM | 20–60 rpm | Heavy-Duty Industrial |
Outlet Opening: 250–750 mm | Max Incline Angle: 0–35° | 4–10 mm | ≤ 2.5 mm/s | 10–15 years
|
Detailed Table: Types of Shaftless Screw Conveyors (10 Rows, 7 Columns)
Type No. | Spiral Diameter (mm) | Capacity (m³/h) | Max Length (m) | Spiral Thickness (mm) | Motor Power (kW) | Application Material |
SC-100 | 100 | 1–5 | 6 | 10 | 0.75–1.5 | Food waste, light solids |
SC-160 | 160 | 3–15 | 10 | 12 | 1.5–3 | Sludge, screenings |
SC-200 | 200 | 8–20 | 12 | 12–14 | 2.2–4 | Biomass, organic waste |
SC-250 | 250 | 12–35 | 20 | 14 | 3–5.5 | Paper pulp, chemical slurry |
SC-300 | 300 | 18–45 | 25 | 16 | 4–7.5 | Sand, grit, aggregates |
SC-350 | 350 | 25–60 | 28 | 18 | 5.5–11 | Industrial sludge, ash |
SC-400 | 400 | 30–75 | 30 | 20 | 7.5–15 | Cement, high-density solids |
SC-500 | 500 | 40–90 | 32 | 22 | 11–18.5 | Mining tailings, minerals |
SC-600 | 600 | 55–110 | 35 | 25 | 15–22 | Heavy sludge, biomass |
SC-700 | 700 | 70–150 | 40 | 25–30 | 18.5–30 | Municipal waste, bulk solids
|
Product Description & Material Properties
Our Shaftless Screw Conveyors are designed for industrial-grade, continuous operation and are available in several models ranging from SSC150 to SSC600. Each system is custom-built to meet specific project requirements.
Parameter | Description |
Capacity Range | 5 m³/h to 150+ m³/h |
Length per Unit | Up to 25 meters |
Trough Fill Rate | 40–45% efficiency |
Torque Capacity | Up to 4000 Nm |
Operating Temperature | Up to 200°C |
Certifications | ISO 9001:2015, CE, JB/T 12636-2016 |
Material Composition
Spiral: Here we use Q345B high-tensile steel or 304/316 stainless steel (thickness: 6–16 mm).
Trough: 5–8 mm carbon or stainless steel with 12–25 mm UHMW-PE wear liner.
Drive: 1.1–45 kW motor with XWD/ZJ-type high-torque gear reducer for smooth startup and stable performance.
Shaftless Screw Conveyor Working mechanism
The shaftless spiral rotates inside a U-shaped or tubular housing. As the spiral turns, material is driven along the trough by friction between the spiral and the material itself. Unlike shafted conveyors, there are no intermediate bearings or central support, reducing friction and preventing material accumulation.
The enclosed system ensures odor control, containment of hazardous materials, and cleaner work environments that ideal for waste treatment and food industries.
Uses Of a Shaftless Screw Conveyor
Shaftless screw conveyors are widely used across multiple industries, including:
Wastewater treatment plants (in sludge and screenings).
Food and beverage processing (In pulp, by-products organic waste).
Mining and minerals (FOR coal slurries, fine ash).
Pulp & paper mills (FOR fibrous residues).
Municipal waste handling (FOR solid waste and recyclables).
Agricultural sectors (For grain, compost, feed materials).
Key Features of Shaftless Screw Conveyors
High capacity material handling: The capacity is Up to 150 m³/h throughput.
Compact and modular design: It has a Flexible layout for plant integration.
Low maintenance: the maintainance is Long-lasting UHMW liners and smooth operation.
Corrosion and wear resistance: The conveyor is Suitable for aggressive materials.
Fully sealed structure: It also Prevents leakage and odor emission.
Continuous, low-noise performance: It is Ideal for enclosed installations.
Core Components Overview
Component | Material | Function | Lifespan | Maintenance Schedule |
Shaftless Helical Spiral | Q345B or SS304/316 | Transports materials with high torque | 4–8 years | Inspect every 500 hours |
U-Trough | Carbon or Stainless Steel | Housing structure | 15+ years | Annual corrosion check |
Wear Liner | UHMW-PE | Reduces friction and wear | 3–6 years | Quarterly inspection |
Drive Unit | Motor (1.1–45 kW) | Provides rotation torque | 6–10+ years | Oil change every 2,500 hrs |
Seals & Bearings | High-quality alloy | Prevents leakage | 2–4 years | Re-lubricate every 3–6 months |
Installation & Maintenance Guidelines
Install on a rigid horizontal support base.
Ensure alignment between the drive assembly and trough.
Connect inlet and outlet flanges securely for airtight operation.
Run empty startup tests before loading material.
Follow a preventive maintenance schedule for optimal lifespan.
Technical Advantages in Manufacturing – Senotay Quality
As a leading shaftless screw conveyor manufacturer, Hebei OuTai Environmental Protection Equipment Co., Ltd. (Senotay) guarantees precision engineering and enhanced durability through:
Advanced CAD & CNC fabrication technology.
High-torque gear drive assemblies (up to 4000 Nm).
ISO 9001:2015 certified production system ensuring consistent quality.
Custom engineering for every industry application.
Strict QC and testing standards per Chinese manufacturing benchmark JB/T 12636-2016.
Expert after-sales service and technical support worldwide.
Frequently Asked Questions (FAQs)
1. What materials can a shaftless screw conveyor handle?
Answers:Sticky, viscous or fibrous materials such as sludge, food waste, biomass and recyclables.
2. What is the maximum length of a single conveyor?
Answers:Up to 25 meters in one section, and longer lengths possible through series connection.
3. Is the system customizable?
Answers:Yes, Senotay manufactures conveyors to match specific capacities, materials, and plant layouts.
4. What are the typical maintenance requirements?
Answers:Inspect spirals and liners regularly; lubricate bearings every 3–6 months; replace worn parts as per lifetime schedule.
5. What certifications do Senotay conveyors comply with?
Answers:All systems are ISO 9001:2015 and CE certified also complying with JB/T 12636-2016 standards.
