This is an update of a previous design. This one has been updated to allow the filament end to be held in place without a clip. Can be used on rack or roller style holders.
I recommend printing a layer height no more than 50% of your nozzle size(ex. no more than .20mm layer height for .40mm nozzle). Printing any higher can result in overhang issues on the threads.
Update 04/21/2024: Added version with increased outer diameter to 202mm from 195mm.
The author remixed this model.
Updated my previous design to make it easier to print and added filament end holders.