Shaftless Screw Conveyors

The unique features of the SPIRAC Shaftless Screw Conveying Systems present new possibilities when designing materials handling systems.

The goal at SPIRAC is to provide customisable and durable conveying equipment for those industries that demand the highest-quality solid material handling systems available. There is an array of equipment that can help to make that goal a reality, but at the centre of our offering lies our unique shaftless screw conveyor.

SPIRAC's horizontal, inclined and vertical shaftless screw conveyors - with no intermediate or end bearings, low RPMs and low power usage - are an extremely reliable conveying option. For many facilities, space is at a premium, which is why the shaftless screw conveyor is designed to integrate into many configurations.

Material handling can place a lot of pressure on equipment, as many of the industries SPIRAC serves feature harmful, possibly corrosive substances. With a shaftless screw conveyor, however, maintenance is significantly reduced when compared to traditional conveying methods. The elimination of a central shaft allows a much higher fill rate meaning solutions are more efficient when it comes to conveying, and consequently suffer less wear and power usage.

Shaftless screw conveyor

The unique design of the shaftless screw allows for higher filling rates and lower RPMs - resulting in less wear, and consequently less demands for repair and down time. The spirals themselves can be made of many different materials, however the primary material is high tensile micro-alloyed steel (HTMAS) - a special steel from Sweden with mechanical properties that deliver incredible strength to the SPIRAC spiral.

No intermediate or end bearings

The more moving parts in a piece of equipment, the more faults that can occur. By eliminating intermediate and end bearings, the need for major maintenance work is reduced. It also allows for more efficient and direct transfer into another conveyor - whether that be horizontal, inclined or vertical.

DURAFLO® Type SPX liners

SPIRAC's proprietary liner - DURAFLO® Type SPX - has been designed specifically to ensure low wear and a long life. A combination of material thickness and formulation gives DURAFLO® Type SPX its unique wearing characteristics. DURAFLO® Type SPX has been developed over many years, and is one of the key features which ensures that SPIRAC conveyors stand as the industry leader. The DURAFLO® Type SPX liner also has a built-in wear indicator with a snap-in, snap-out feature, making it as painless as possible when the time comes to replace it.

Totally enclosed troughs

SPIRAC shaftless screw conveyors come in horizontal, vertical and inclined configurations, and options for either a U-trough or octagonal (OK) trough. All varieties are totally enclosed with elastomeric seals and gaskets, ensuring there is no spillage of the material being conveyed and that odours are completely contained.

Direct drive

Further reducing the downtime and expense that comes along with regular repairs and service, SPIRAC's direct-drive design allows a clean and efficient transmission - without the required maintenance of belt and chain drives.

Features and Benefits:

  • Low RPMs for long life expectancy and minimal wear of components, making the system virtually maintenance free.
  • Low power usage for greater energy savings.
  • Less wear means less down time, and greater productivity for your facility.
  • Configuration flexibility makes the handling of large objects possible, no matter how tight space restrictions are.
  • Fully sealed troughs and gasketed joins for effective odour and mess containment.
Shaftless Conveyor System
Horizontal (OK trough) and Vertical (U trough) shaftless screw conveyor from SPIRAC
Shaftless Screw Conveyor Liner, DURAFLO SPX
Shaftless Screw Conveyor, Gearbox mount, Keyed Shaft