Spoon augers were eventually replaced by an improved tool - the screw auger, although chair-makers used spoon augers into the 19th century. A spoon auger like this one requires a starting hole ...

The Helix flexible screw conveyor (photo) features a helicoid screw that rotates within a fixed tube to transport materials efficiently from one point to another. It supports horizontal conveying up ...

We’ve seen lots of homebrew plastic extruders before, most of which use repurposed auger-type drill bits as compression screws. Those lack the variable geometry of a proper compression screw ...