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Helical Augers Sectional helical screw flights, called augers, are formed, from a flat disc with a hole in the middle, with a press. A . The helical sections are welded to standard carbon steel pipe. Continuous helical auger flights are also available at a higher cost. Standard Auger Diameters 4, 6, 9, 10, 12, 14, 16, 18, 20, 24 inches.
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