I need to replace my heatbreak on my Anet A6 since I pushed out the PTFE tube when my filament got clogged...

The current heatbreak has a length of 40 mm, but, the shop I'm buying from only sells the 30 mm or 35 mm (the 40 mm is out of stock).

Can I just install a 35 mm heatbreak? Or even a 30 mm? Or is the 40 mm crucial in the design of the Anet A6?


1 Answer 1


This hotend design is called a Mk8 type/style hotend, based on the Mk8 Makerbot design. You should get the 40 mm length heatbreak, this option gives you some extra space, a shorter heatbreak will result in changing the Z-endstop height or raise the bed (if the endstop is fixed).

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The 30 mm will for sure be too short and result in a gap in the heat conducting element, the 35 mm might work. You can source the heatbreaks from typical online market places for about a dollar you get 5 pieces, order these while you try if the 35 mm version works for you (depending on endstop and bed).

  • 1
    $\begingroup$ Thank you for your considerations. I have a BLtouch to probe the bed. This will mean that I need to adjust the Z-offset when I'm going to try the 35 mm. I do need to check if the BLtouch will be high enough for this Z-offset $\endgroup$
    – zwep
    Jan 14 at 13:17
  • $\begingroup$ @zwep Yes, in case you have a touch sensor you need a different bracket or move the sensor up and redefine the Z-offset. $\endgroup$
    – 0scar
    Jan 14 at 15:04

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