The modular shafted screw conveyor system is highly versatile offering numerous solutions for conveying flowable bulk solids. Shafted screw conveyors are manufactured from mild steel, AR (abrasion-resistant) steel, stainless steel and other alloys, with a suitable surface finishing. They are made up from a U or V-shape trough that is equipped with at least one outlet spout, an end plate at each trough end, helicoid or sectional screw flighting welded on a center pipe bushed at each end, end bearing assemblies complete with shaft sealing unit, a certain number of intermediate hanger bearings depending on the overall length of the screw conveyor, and bolted trough cover sections.
Shafted screw conveyors are equipped with a gear drive that suits the application. Screw feeders or live bottom conveyors with multiple screws in a common housing are available for applications such as bin unloading. Depending on the material to be handled, shafted screw conveyors can be fabricated in a CEMA standard Group 1, Group 2, and Group 3 component construction.
Current CEMA standards cover 6”, 9”, 12”, 14”, 16”, 18”, 20” and 24” diameter conveyor sizes with U-trough. Standard shaft sizes are 1-1/2”, 2”, 2-7/16”, 3” and 3-7/16” diameters, with 2-bolt drilling. While other screw sizes, shaft diameters and V-trough (flared) housings are available, there are no established industry standards.
