The file 'Yet Another Bowden Coupler (PC4-M6, PC4-M10) 3D Printer Model' is (stl) file type, size is 1.8MB.
All of PC4-M6 I tried have some flaws:
So I designed that one with flat transition from 4mm to 2mm which works better even without countersinking the tube.
And since tapered thread was actually hardest part I did PC4-M6 with countersink and PC4-M10 with tube pass-through too.
So you have:
When printing:
For better search: pneumatic fitting, bowden fitting adapter, extruder coupling
PC4-M10.stl | 1.3MB | |
PC4-M6_Countersink.stl | 1.1MB | |
PC4-M6_Flat.stl | 1.1MB | |
Tightening_Nut.stl | 572.1KB |