Vortex Extruder Knob

thingiverse

I designed this updated Extruder Knob specifically for the Ender 3, but it will fit any compatible stepper motor without a hitch. I made sure to create it extra tight so that it fits snugly onto the shaft - unlike previous models I tried, which eventually loosened up and started slipping out of place. If you want to fine-tune the fit, you can simply scale the model down or up to suit your needs, but at 100% it's a perfect fit on a well-calibrated printer. In the photo, I performed a filament change on the Extruder Knob - just for kicks! But feel free to print it in any PLA material of your choice. Update: March 30, 2019 - I've added another version with an extended shaft, giving you even more clearance to view when performing filament changes.