PTFE tubes in Original Prusa i3 printers
What is PTFE and where do I find it?
Polytetrafluoroethylene (PTFE) is a synthetic material, which is mostly known as Teflon. Tubes from this material are used to guide filament in all Original Prusa i3 printers. In case your printer is jammed and the tube is damaged, we've prepared following step-by-step guides to making new ones.
Prusa Research recommends purchasing PTFE tubes from company Festo, which provides the highest quality. You can also use tubes from E3D, but in case of Multi Material printer please check the internal dimensions. You can also find certain PTFE tubes on our eshop shop.prusa3d.com, log in using your account and look for a section with the spare parts.
Original Prusa i3 MK2 and MK2S
On the printer, there is only one PTFE tube, which is located inside the hotend. Outside diameter is 4 mm and inside diameter is 2 mm. The same tube fits MK2.5 and MK3 hotend.
Original Prusa i3 MK2.5 and MK3
On the printer, there are two PTFE tubes. The longer tube with outside diameter 4 mm and inside diameter 2 mm is located in the hotend. The same tube fits MK2 and MK2S hotend.
The second tube is located on the top of the extruder and shares the previously mentioned diameters but is shorter. See the guide below on how to create a new one, afterwards follow the MK3 extruder assembly.
Original Prusa i3 MK2/S Multi Material (1st gen)
The Multi Material version of the MK2/S utilizes three kinds of PTFE tubes.
First tube is used inside the hotend. WARNING, the PTFE tube for the first generation of the Multi Material is different from the others! While sharing the same outside 4mm diameter, the internal is smaller with only 1.85-1.9 mm! Make sure you use the correct dimensions, or there is a risk of frequent filament jams.
The second tube is used to guide filament from the extruders on the top of the frame to the multiplexer. It is recommended getting a wider 2.0 mm diameter, but you can use the same as for the hotend. Make together two or four pieces depending on your type of Multi Material (Dual/Quad).
Third kind of the PTFE tube is used in the spool holders. Again, it is recommended getting a wider 2.0 mm diameter, but you can use the same as for the hotend. Make together two or four pieces depending on your type of Multi Material (Dual/Quad).