{"product_id":"mellow-nf-ctd-bi-metal-heat-break-chimera-hotend-1-75mm-1","title":"Mellow NF-CTD Bi-Metal Heat Break for Chimera Hotend 1.75mm","description":"\n\u003ch2\u003eMellow NF-CTD Bi-Metal Heat Break for Chimera Hotend\u003c\/h2\u003e\n\u003cp\u003eUpgrade your 3D printer's hotend with the \u003cstrong\u003eMellow NF-CTD Bi-Metal Heat Break\u003c\/strong\u003e — engineered for the Chimera dual-extrusion hotend and compatible with popular printers like the Sidewinder X1 and Genius. This precision-crafted throat combines a \u003cstrong\u003ecopper M6 thread\u003c\/strong\u003e, a \u003cstrong\u003ehigh-precision titanium (TC4) mid-tube\u003c\/strong\u003e, and a \u003cstrong\u003ecopper 7mm heat-sink end\u003c\/strong\u003e to deliver superior thermal performance, smoother filament flow, and more reliable printing sessions.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Upgrade to a Bi-Metal Heat Break?\u003c\/h3\u003e\n\u003cp\u003eStandard all-steel heat breaks can transfer too much heat upward into the cold zone, leading to jams and inconsistent extrusion. The NF-CTD solves this with a \u003cstrong\u003edual-material design\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCopper M6 thread end:\u003c\/strong\u003e Conducts heat efficiently into the melt zone so filament softens quickly and flows smoothly.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTitanium (TC4) mid-tube:\u003c\/strong\u003e Acts as a thermal barrier, dramatically reducing heat creep up into the cold zone. Better heat resistance than stainless steel alternatives.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCopper 7mm heat-sink end:\u003c\/strong\u003e Rapidly transfers heat away to your cooling block, keeping the cold zone cold and improving heat-dissipation efficiency.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHigh-Precision CNC Manufacturing\u003c\/h3\u003e\n\u003cp\u003eThe titanium mid-tube is CNC machined to an internal surface finish of \u003cstrong\u003eless than 0.3µm\u003c\/strong\u003e. This ultra-smooth bore reduces friction on the filament path and minimises the risk of clogs. The proprietary tube structure also prevents the titanium section from separating from the copper ends — giving you a durable, long-lasting component.\u003c\/p\u003e\n\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e NF-CTD (11CTDT)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Hotend:\u003c\/strong\u003e Chimera (DCrazy variant)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Printers:\u003c\/strong\u003e Sunrise Extruder, Sidewinder X1, Genius, and other Chimera-based setups\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilament Diameter:\u003c\/strong\u003e 1.75 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeat End:\u003c\/strong\u003e 7mm copper\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeating End Thread:\u003c\/strong\u003e M6 copper\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTotal Length:\u003c\/strong\u003e 22 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Copper \u0026amp; Titanium TC4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAssembly Required:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHeat Break Performance Test Results\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;max-width:500px;\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:4px 8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eHotend Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px;border:1px solid #ddd;\"\u003e212.3 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:4px 8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTest Duration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px;border:1px solid #ddd;\"\u003e10 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:4px 8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eAmbient Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px;border:1px solid #ddd;\"\u003e28.5 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:4px 8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTemperature Sensor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px;border:1px solid #ddd;\"\u003eK-Type thermocouple\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:4px 8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eCooling Fan\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px;border:1px solid #ddd;\"\u003e3010 axial fan\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:4px 8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTest Assembly\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px;border:1px solid #ddd;\"\u003eV6 hotend\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:4px 8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eHeating Block Insulation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px;border:1px solid #ddd;\"\u003eThermal insulation cotton\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:4px 8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eHeater Cartridge\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:4px 8px;border:1px solid #ddd;\"\u003e12V 40W\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× Mellow NF-CTD Bi-Metal Heat Break (CTD Heat Break)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10-pack-65mm-oscillating-multi-tool-saw-blades-high-carbon-steel\"\u003e10-Pack 65mm Oscillating Multi-Tool Saw Blades | Carbon Steel\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/nitrile-work-gloves-anti-slip-full-finger-5-pair\"\u003e5-Pair Nitrile Work Gloves – Anti-Slip Full Finger Safety\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/ball-end-hex-screwdriver-bit-magnetic-reduced-shank-steel\"\u003eBall End Hex Screwdriver Bit – Magnetic Reduced Shank Steel\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What 3D printers is the Mellow NF-CTD heat break compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: The NF-CTD bi-metal heat break is designed for the \u003cstrong\u003eChimera dual-extrusion hotend\u003c\/strong\u003e (DCrazy version) and is compatible with the \u003cstrong\u003eArtillery Sidewinder X1\u003c\/strong\u003e, \u003cstrong\u003eArtillery Genius\u003c\/strong\u003e, \u003cstrong\u003eSunrise Extruder\u003c\/strong\u003e, and other 3D printers that use a Chimera-style hotend with 1.75mm filament.\u003c\/p\u003e\n\u003ch4\u003eQ: What makes a bi-metal heat break better than a standard all-stainless one?\u003c\/h4\u003e\n\u003cp\u003eA: A bi-metal heat break uses two materials optimised for their respective roles. The \u003cstrong\u003etitanium TC4 mid-tube\u003c\/strong\u003e provides superior thermal insulation compared to stainless steel, reducing heat transfer upward into the cold zone. The \u003cstrong\u003ecopper ends\u003c\/strong\u003e handle fast heat conduction where it is needed — at the melt zone and at the heat sink — resulting in improved filament flow, fewer clogs, and more consistent extrusion quality.\u003c\/p\u003e\n\u003ch4\u003eQ: What filament diameter does this heat break support?\u003c\/h4\u003e\n\u003cp\u003eA: This heat break is designed specifically for \u003cstrong\u003e1.75mm filament\u003c\/strong\u003e. It is not compatible with 2.85mm or 3mm filament setups.\u003c\/p\u003e\n\u003ch4\u003eQ: Does this heat break require any special tools to install?\u003c\/h4\u003e\n\u003cp\u003eA: Assembly is required. You will need basic hotend assembly tools (e.g. a spanner or adjustable wrench). It is recommended to install the heat break while the hotend is at operating temperature so you can torque it correctly and achieve a good seal between the heat break and nozzle, minimising the risk of leaks.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What 3D printers is the Mellow NF-CTD heat break compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The NF-CTD bi-metal heat break is designed for the Chimera dual-extrusion hotend (DCrazy version) and is compatible with the Artillery Sidewinder X1, Artillery Genius, Sunrise Extruder, and other 3D printers that use a Chimera-style hotend with 1.75mm filament.\"}}, {\"@type\": \"Question\", \"name\": \"What makes a bi-metal heat break better than a standard all-stainless one?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A bi-metal heat break uses two materials optimised for their respective roles. 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