//RecycleBot Modification - Auger Shaft $fn=100; union() { cylinder(h=100, r1=5, r2=5); difference() { cylinder(h=1, r1=15, r2=15); translate([0,0,-0.5]) cylinder(h=2, r1=10, r2=10); } translate([0,-13,0]) cube([1,26,1]); rotate([0,0,90]) translate([0,-13,0]) cube([1,26,1]); }