Ultimaker 2 underextruding, atomic method seems to not help

[gr5 2,027]

The i2k isolator will keep your teflon part at 100C even if without it the bottom of the isolator would have been 250C (nozzle temp). Unless you do retractions - if you do retractions all bets are off because each retraction brings more heat and further distance up the print head.

The 3dsolex isolator should not last any longer but it is a bit slipperier. It is official dupont teflon and not a different name brand. The Ultimaker isolators are glass filled - they are ever so slightly darker in color due to the glass. The glass is supposed to give it some strength but I'm skeptical that they last much longer than the pure PTFE ones.

500 hours seems about right if you are printing at 260C. No one seems to have good data on how long they are expected to last if used at a particular temperature. They last much longer at 210C than at 250C but no matter what temperature you print at they seem to go soft eventually. You can also drill them out and they will last a little longer.

It also seems to depend maybe on the pressure - how hard it is being squeezed by the spring above it and also how hard the bowden is pushing down on it.