Screw flight
Shaftless Auger Flight Assembly
Open-centre shaftless auger flight assemblies made to a confirmed helix, overall length and connection drawing.
Engineering fit
Built around the dimensions, material and production target that matter
A self-supporting open-centre helix for projects where the finished screw is specified without a continuous centre pipe.
Use the stated range as a practical starting point. We confirm the final configuration against your drawing, material and operating conditions.
Discuss this product
- Replacement shaftless screw sections
- Open-centre conveying assemblies
- Drawing-based conveyor screw projects
Product data
Product Specifications
| Parameter | Specification |
|---|---|
| Helix geometry | Confirm outside diameter, inside opening, pitch, section profile and hand |
| Assembly definition | Confirm overall length, number of pitches, joints and end interfaces |
| Construction | Open-centre flight assembly without a continuous centre tube |
| Material | Specify the required grade and operating environment for review |
| Supply condition | Straight sections, joined assemblies or drawing-defined end preparation |
Workshop reference
Product and process views
What it is
A shaftless auger flight assembly is an open-centre helix supplied as a finished or partly finished screw section. It does not use a continuous pipe through the centre of the flight. That construction makes the assembly, its joints and its end interfaces part of the product definition.
Geometry review
The flight profile alone is not enough for quotation. The drawing should state outside diameter, inside opening, pitch, section width and thickness, hand and overall length. If diameter or pitch changes, provide a schedule showing where each change begins and ends.
Assembly and connection details
Identify whether the order is for individual straight sections or a joined assembly. Show joint positions, end plates, drive stubs, support points and any orientation marks needed during installation. The final scope is confirmed from the approved assembly drawing.
When to choose this option
Choose a shaftless assembly when the conveyor or process design specifically requires an open centre. If the flight will be welded to a tube or solid shaft, use a shafted auger assembly instead. For loose single-pitch segments, review the sectional spiral blade.
Quote checklist
- Outside diameter, inside opening, pitch and hand
- Flight section width, thickness and profile
- Material grade and operating environment
- Overall length and number of sections
- Joint positions and joining requirements
- Drive, support and end-interface drawings
- Quantity and required supply condition
- Photos or measurements from the existing installation
Before quotation
Frequently asked questions
Use these answers as a starting point. Final geometry, material and equipment scope are confirmed from the project information.
What makes this different from loose screw flighting?
The quotation covers an open-centre helical assembly rather than only a loose flight profile. Overall length, joints and end connections therefore need to be defined.
Which dimensions are required?
Provide outside diameter, inside opening, pitch, section width and thickness, hand, overall length and any change in geometry along the assembly.
Can an existing shaftless screw be replaced from a sample?
A sample and photographs are useful, but a dimensioned drawing is still recommended so pitch, end interfaces and installed length can be checked before production.
How should the end connection be specified?
Show the drive or support interface, connection plate or stub details, hole pattern, weld preparation and the datum used to control total length.
Square-Bar Flexible Auger
A flexible auger made from a square-section profile, with the bar section, coil geometry and installed tube route reviewed as one system.
View details
Cold-Rolled Continuous Screw Flight
Cold-formed strip flighting for applications that need continuous, seamless geometry and controlled pitch, diameter and thickness.
View details
Continuous Constant-Thickness Auger Flight
A continuous mould-winding route for multi-pitch flights where material utilization and consistent wall thickness are priorities.
View details
Rounded-Edge Spiral Flight
A helical flight whose rounded edge is part of the specified section, requiring profile dimensions as well as the normal helix geometry.
View detailsEngineering review
Discuss your Shaftless Auger Flight Assembly requirement
Share the diameter, pitch, thickness, material, quantity and application. Our team will review the manufacturing route before quoting.