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  1. This guide is dedicated to the PTFE trimming both for single and multi-material Original Prusa i3 printers, supported models are listed later on.
    • This guide is dedicated to the PTFE trimming both for single and multi-material Original Prusa i3 printers, supported models are listed later on.

    • Read all these instructions before proceeding with the actual trimming and drilling! First few steps explain necessary tools, exact dimensions are given later.

    • Where to get the PTFE tubes?

    • Trimmed and drilled tubes are available as spare parts at our eshop (shop.prusa3d.com), in case any tube is missing, please contact our support via the live-chat window.

    • Alternatively, you can purchase the PTFE tubes from other suppliers. Make sure the PTFE tube has the desired dimensions (diameter), the lowest possible tolerances and also the hole is properly centred.

    • Regarding the brands, we have very good experience with FESTO. You can also get PTFE tubes from E3D.

  2. ATTENTION!!! Please read all instructions at least twice! If you trim or drill the tube improperly, you will have to order it again! READ CAREFULLY instructions for the tools before you proceed further. Prusa Research is not responsible for any harm or injury.
    • ATTENTION!!! Please read all instructions at least twice! If you trim or drill the tube improperly, you will have to order it again!

    • READ CAREFULLY instructions for the tools before you proceed further. Prusa Research is not responsible for any harm or injury.

    • For trimming get a cutting tool with a thin blade. Use either razor or carpet knife. DON'T use kitchen knife.

    • For drilling is recommended to use a drill bit with conic head or you can use a drill bit with diameter 3,5 - 4 mm. The point is to make a conical entrance in the tube.

  3. Take the razor or knife and carefully trim the tube.
    • Take the razor or knife and carefully trim the tube.

    • Don't press too hard during the cutting on the tube, you can deform the circular shape and this will lead to filament jam!

  4. After cutting the tube to the appropriate length, you need to create the conical entrance. Use the drill bit you've prepared in the beginning. You can use an electric drill, but set it to low RPM and press very gently.
    • After cutting the tube to the appropriate length, you need to create the conical entrance.

    • Use the drill bit you've prepared in the beginning. You can use an electric drill, but set it to low RPM and press very gently.

    • For the other end, it is possible to use a pencil sharpener.

    • It is important to achieve smooth entrance, so the filament will slide in. Clean the tube from any particles, which might prevent it.

  5. Latest printers:
  6. This an ideal shape of the PTFE tube for Original Prusa i3 printer. Given dimensions and angles are recommended values. HOTEND PTFE PTFE HOLDER
    • This an ideal shape of the PTFE tube for Original Prusa i3 printer. Given dimensions and angles are recommended values.

    • HOTEND PTFE

    • PTFE HOLDER

    • EXTRUDER TO MMU2 UNIT

    • See the next step for the other PTFE tubes for the MMU2S printer.

    • All dimensions are in millimetres.

  7. This an ideal shape of the PTFE tube for Original Prusa i3 printer. Given dimensions and angles are recommended values.
    • This an ideal shape of the PTFE tube for Original Prusa i3 printer. Given dimensions and angles are recommended values.

    • MMU2 UNIT TO BUFFER

    • All dimensions are in millimetres.

  8. This an ideal shape of the PTFE tube for Original Prusa i3 printer. Given dimensions and angles are recommended values.
    • This an ideal shape of the PTFE tube for Original Prusa i3 printer. Given dimensions and angles are recommended values.

    • This PTFE is compatible only with Single Material version, for Multi Material you need different size, see the other steps.

    • HOTEND PTFE

    • All dimensions are in millimetres.

  9. This an ideal shape of the PTFE tube for Original Prusa i3 printer. Given dimensions and angles are recommended values. HOTEND PTFE PTFE HOLDER
    • This an ideal shape of the PTFE tube for Original Prusa i3 printer. Given dimensions and angles are recommended values.

    • HOTEND PTFE

    • PTFE HOLDER

    • SPOOL HOLDER

    • See the next step for the last PTFE tube for the MMU2 printer.

    • All dimensions are in millimetres.

  10. This an ideal shape of the PTFE tube for Original Prusa i3 printer. Given dimensions and angles are recommended values.
    • This an ideal shape of the PTFE tube for Original Prusa i3 printer. Given dimensions and angles are recommended values.

    • EXTRUDER TO MMU2 UNIT

    • All dimensions are in millimetres.

  11. This an ideal shape of the PTFE tube for Original Prusa i3 printer. Given dimensions and angles are recommended values. HOTEND PTFE
    • This an ideal shape of the PTFE tube for Original Prusa i3 printer. Given dimensions and angles are recommended values.

    • HOTEND PTFE

    • EXTRUDER TO MULTIPLEXER

    • All dimensions are in millimetres.

  12. This an ideal shape of the PTFE tube for Original Prusa i3 printer. Given dimensions and angles are recommended values. HOTEND PTFE
    • This an ideal shape of the PTFE tube for Original Prusa i3 printer. Given dimensions and angles are recommended values.

    • HOTEND PTFE

    • EXTRUDER PTFE (MK3/MK2.5 only)

    • All dimensions are in millimetres.

Finish Line

22 other people completed this guide.

Jakub Dolezal

Member since: 02/20/2017

225 Guides authored

Team

Prusa Research Member of Prusa Research

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3 Members

367 Guides authored

8 Comments

Nice process update. I think the pencil sharpener and drill ideas make this much easier and safer to complete than the previous method. The additional photos and diagram are excellent as well.

Douglas Shelfoon - Reply

What is the precise length of the PFTE tube for a MK2 ?

Andre Laurendeau - Reply

Hi Andre,

MK2 and MK2S share the same hotend, therefore 50 mm and shape according to the step 2.

Jakub Dolezal -

Any chance we can get an updated how to replace the PTFE tube? The only information/guide I can find is obsolete, and seemingly requires cutting/trimming of the tube, which would render the tapering redundant.

Trevor Tennison - Reply

Hi Trevor,

yes the manual is on its way. First, we need to finish the new MMU upgrade.

Jakub Dolezal -

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