What wears out first?

The liner strips, which are deliberately sacrificial and replaceable from outside the trough. Coil life depends on the abrasive fraction of the material; heavier coils are available for sludge and grit duties.

Can it run inclined or around corners?

Yes. Because there is no intermediate shaft, one conveyor can rise, bend and continue, which often removes a transfer point and the dust emission that goes with it. The achievable rise depends on the material and is confirmed by a test.

Conveying

Shaftless Screw Conveyor

Name: Shaftless Screw Conveyor
Brand: CYprocess
Availability: InStock

CYprocess shaftless screw conveyors — also called spindleless conveyors or shaftless augers — move sticky, stringy and compactible materials through a lined trough with no centre pipe. With only one spiral coil doing the work, there is no shaft for material to build up on.

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Shanghai-built. Drawings come with the quotation, and material certificates are available on request. Factory and documents

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Overview

About Shaftless Screw Conveyor

How this equipment works in powder handling lines and what to consider when selecting it.

Working principle

A heavy-gauge spiral coil runs the full length of a steel trough lined with low-friction liner strips. Because there is no centre tube, the coil bears directly on the liners and the effective filling cross-section is larger than in a shafted screw of the same size. Material is pushed along as one continuous bed, which keeps fibrous and sticky products moving instead of winding around a shaft.

Options and integration

Liner material, coil thickness and trough cover are selected from the material and the duty. Troughs can be dust-tight for powders or open with drainage for wet cake, and horizontal, inclined and bent layouts are combined to follow the plant route. Discharge gates, breakers and load cells can be added at the outlet.

Where it fits in the process

Material Intake

Conveying

Dosing

Mixing

Packaging

Features

Key Features

Design points that make the Shaftless Screw Conveyor practical for industrial powder plants.

No centre pipe — nothing for sticky or stringy material to wrap around

Large effective filling cross-section in a compact trough

Horizontal, inclined and 3D-bent layouts in one conveyor

Replaceable low-friction liner strips protect the trough

Fully enclosed cover with inspection ports for dusty products

Heavy-gauge spiral for sludge, filter cake and compactible waste

Standard models from 100 to 300 mm spiral diameter

Specifications

Typical Specifications

Final sizing depends on material properties, capacity and plant layout. Request a project review for a tailored proposal.

Type	Shaftless spiral in lined trough
Spiral diameter	About 100 - 315 mm (standard range)
Layout	Horizontal / inclined / bent combinations
Liners	UHMW-PE, steel or wear-resistant composite
Trough	Dust-tight, weather cover or open-drain
Sizing	From material test and required rate

Materials

Suitable Materials

Powder and granule categories typically specified with a shaftless screw conveyor. Suitability is confirmed per project from bulk density, particle size, moisture and process conditions.

Wet cake & sludge

filter cake, dewatered sludge, gypsum paste

Sticky powders

titanium dioxide paste, pigment filter cake

Fibrous material

fibre waste, biomass, baghouse fines

Food residues

peelings, pomace, wet spent grain

Compactible waste

powder bags' rejects, mixed dry waste

Not sure whether your material will convey? Send us a sample description and we will confirm before quotation.

Applications

Process Applications

Process points where this equipment is typically installed, from bulk intake through to packing.

Filter cake and sludge from dewatering units

Sticky and moist powders that bridge in shafted screws

Fibrous and stringy by-products

Compactible waste and bag-house discharge

Food processing residues and biomass

Chemical paste-like intermediates

Inclined transfer where a shafted screw would clog

Downloads

Catalogs & Datasheets

Technical documents related to this product and our powder handling range.

All downloads

Product Catalog

CYprocess Powder Handling Product Catalog (2026)

PDF · 3.5 MB

Download

Technical Datasheet

Trough Screw Conveyor Datasheet

PDF · 126 KB

Download

Technical Datasheet

Tubular Screw Conveyor Datasheet

PDF · 123 KB

Download

Technical Datasheet

Shaftless Screw Conveyor Datasheet

PDF · 150 KB

Download

FAQ

Shaftless Screw Conveyor FAQ

Common questions about selection, integration and quotation.

When the material is sticky, stringy or wet enough to build up on a centre pipe and hanger bearings. Removing the shaft eliminates the two places where such products normally clog, and the larger filling section lets a smaller conveyor carry the same rate.

More FAQ