This complete line of vibrating tube conveyors moves virtually any bulk material without internal parts to wear or break. The machines are available in capacities up to 300 cu ft/hr, with single unit lengths up to 25 ft. They can be linked together for longer conveying distances and are available in carbon and stainless steel, with finishes to meet virtually any sanitary specification. Optional controls provide a 5:1 feed range and, when connected to a bin activator or bulk bag unloader, feed accuracies of 2-3% are possible for most materials. They also have the ability to handle fragile particles without degradation. A flexible connection at either end makes the machines entirely dust-tight.