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I am trying to replace a Mk8 heatbreak on my printer. But which orientation do I need to put into the heatblock? The left image or the right image? Note that this specific heatbreak is missing a PTFE tube.

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I quickly looked at the other questions on this forum but could not find a clear result with images.

zwep
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The PTFE liner should be in contact with the nozzle, and is normally cut half a millimetre over-size to ensure that it remains in contact.

Mick
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  • Thanks! That makes sense. To make it absolutely clear, that means that the right picture should be screwed into the heatblock, right? – zwep Jan 19 '22 at 08:08
  • @zwep Yes. That end should be partially stopped, so that the PTFE tube cannot pass through it (but the filament can). – Mick Jan 19 '22 at 09:22