Planetary roller extruder

A planetary roller extruder comprising:

• a housing comprising an internal housing toothing;
• said housing comprising an extruder section and a feed section;
• a central spindle being disposed in said extruder section and comprising an external central spindle toothing;
• a plurality of planetary spindles being disposed about said central spindle and in said housing;
• each of said planetary spindles comprising an external planetary spindle toothing configured to mesh with said internal housing toothing and said external central spindle toothing;
• a single screw being disposed in said feed section;
• a drive being configured to rotate said single screw;
• said single screw comprising a first end being connected to said drive, and a second end being connected to said central spindle to permit said drive to rotate both said single screw and said central spindle together;
• said first end of said single screw and said drive being screwed together;
• said second end of said single screw comprising a bore;
• and
• said bore comprising internal projections configured to engage with said external central spindle toothing to secure said central spindle and said single screw together by a screw-type connection.