You might visit the lyman again and read the design files as an auger design (non drill bit) is included. Otherwise you could also buy the usd 630 filabot feed screw.
However and if wrong I'm sure others will correct me, the auger is not about speed but about filament diameter consistency. It's rather easy to get the lyman (or any other filament extruder) to do 1kg/hour or faster just throw in a more powerful motor.
PS For the record, I have a lyman (heavily modified) doing 1kg 3mm ABS in 54min and that is not really pushing it yet. However all my research is concentrated on improving the diameter consistency which is the hardest part at these speeds. Currently around +/- 0.20mm
However and if wrong I'm sure others will correct me, the auger is not about speed but about filament diameter consistency. It's rather easy to get the lyman (or any other filament extruder) to do 1kg/hour or faster just throw in a more powerful motor.
PS For the record, I have a lyman (heavily modified) doing 1kg 3mm ABS in 54min and that is not really pushing it yet. However all my research is concentrated on improving the diameter consistency which is the hardest part at these speeds. Currently around +/- 0.20mm