It is an object of the present invention to provide a single screw extruder with enhanced coupling to a drive shaft to reduce radial movement of the feed screw when subjected to high loading.
 
Other and additional objects will become apparent from the description as set forth in the specification.

In accordance with the present invention, there is provided a single screw extruder of the type having a drive shaft coupled to the screw for rotational movement wherein the improvement comprises coupling the drive shaft to one end of the screw through a plurality of splines on the screw.

According to preferred embodiments, the respective ends of the screw is coaxially aligned with the drive shaft and coupled together with a sleeve having a plurality of serrations matching the respective splines on the screw.