What is a heatbreak in a hotend?
A heatbreak is a thin metal tube in the hotend that separates hot and cold zones. Prevents filament from melting in the cold-end before the extruder.
Why heatbreak
Without heatbreak, heat spreads from the heater block throughout the hotend tube. Filament would melt before the extruder - clogged nozzle, heat creep. Heatbreak interrupts heat flow.
Materials
- Stainless steel - standard, cheap
- Titanium - better insulation, for high-temp
- Bimetal (copper + steel) - premium, best thermal isolation
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