Shaftless spiral screw conveyors are available in standard diameters of Ø168, Ø219, Ø273, Ø325, etc., or made to order, with lengths of up to 8 m.
Shaftless spiral screw conveyors are used to convey materials such as coal fines, ash and slag, stone dust, crushed stone, sawdust, rice husk, nut shells, wood chips, grains such as coffee beans, corn (maize) and paddy rice, biomass pellets, etc.
Without a central shaft, the shaftless spiral screw conveyor is highly resistant to jamming and can convey high-temperature materials such as hot slag.