{"product_id":"mellow-nf-ctc-bimetal-heat-break-copper-titanium-v6-hotend-1-75mm","title":"Mellow NF-CTC Bimetal Heat Break – Copper \u0026 Titanium V6 1.75mm","description":"\n\u003ch2\u003eMellow NF-CTC All-Metal Bimetal Heat Break for V6 Hotend – 1.75mm\u003c\/h2\u003e\n\u003cp\u003eUpgrade your 3D printer's hotend with the \u003cstrong\u003eMellow NF-CTC Bimetal Heat Break\u003c\/strong\u003e — engineered from a premium combination of \u003cstrong\u003ecopper and titanium (TC4)\u003c\/strong\u003e for superior thermal performance, reduced clogging, and improved print quality. Designed as a direct upgrade for the popular \u003cstrong\u003eV6 hotend\u003c\/strong\u003e platform with 1.75mm filament compatibility.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Upgrade to the Mellow NF-CTC Bimetal Heat Break?\u003c\/h3\u003e\n\u003cp\u003eTraditional single-material heat breaks make compromises — either conducting too much heat upward or dissipating too little at the ends. The NF-CTC solves this with a \u003cstrong\u003ethree-zone bimetal design\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eM6 Copper Heating End:\u003c\/strong\u003e Copper's excellent thermal conductivity helps filament transition into the melt zone faster, boosting flow rate and melting efficiency compared to pure titanium designs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCentral Titanium (TC4) Tube:\u003c\/strong\u003e The titanium mid-section acts as a thermal barrier, minimizing heat creep upward into the cold zone — dramatically reducing jams and heat-related clogs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eM7 Copper Heat-Sink End:\u003c\/strong\u003e Copper rapidly transfers heat to the heat sink, maximizing cooling efficiency and keeping the cold zone cold where it matters most.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePrecision Manufacturing\u003c\/h3\u003e\n\u003cp\u003eThe central titanium tube is produced by \u003cstrong\u003ehigh-precision CNC machining\u003c\/strong\u003e, with an internal surface finish of \u003cstrong\u003eless than 0.3μm\u003c\/strong\u003e. This ultra-smooth inner wall reduces friction and ensures consistent, reliable filament feeding. The proprietary tube structure also prevents separation between the titanium tube and the copper M6\/M7 end fittings.\u003c\/p\u003e\n\n\u003ch3\u003eTested Performance\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eHotend Temperature: \u003cstrong\u003e212.3°C\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eTest Duration: \u003cstrong\u003e10 minutes\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eAmbient Temperature: 28.5°C\u003c\/li\u003e\n  \u003cli\u003eTemperature Sensor: K-Type thermocouple\u003c\/li\u003e\n  \u003cli\u003eAssembled on: V6 hotend with 3010 fan \u0026amp; 12V 40W heating tube\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Copper \u0026amp; Titanium (TC4)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilament Diameter:\u003c\/strong\u003e 1.75mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeat End Thread:\u003c\/strong\u003e M7 (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 25mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInternal Finish:\u003c\/strong\u003e \u0026lt;0.3μm (high-precision CNC)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel Number:\u003c\/strong\u003e 11V6CTCT\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eMade in Mainland China\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Installation Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAssembly is required.\u003c\/li\u003e\n  \u003cli\u003eAfter installation on a V6 heat sink, the heat break will sit \u003cstrong\u003e3mm longer\u003c\/strong\u003e than the original version — you may need to adjust your nozzle fan distance or duct accordingly.\u003c\/li\u003e\n  \u003cli\u003eCopper naturally oxidizes in air and may develop dark spots over time. \u003cstrong\u003eThis is cosmetic only and does not affect performance.\u003c\/strong\u003e If surface oxidation is not acceptable to you, please consider this before purchasing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× Mellow NF-CTC Bimetal Heat Break (Copper \u0026amp; Titanium)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cp\u003eLooking for more workshop and hardware tools? Check out these popular picks:\u003c\/p\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: Is the Mellow NF-CTC heat break compatible with standard V6 hotends?\u003c\/h4\u003e\n\u003cp\u003eA: Yes, the Mellow NF-CTC bimetal heat break is designed specifically for the V6 hotend platform. It uses an M7 thread on the heat sink end and an M6 thread on the heating block end — standard V6 sizing. Note that after installation it will extend approximately 3mm longer than the stock heat break, so minor adjustments to your nozzle fan duct or part cooling setup may be required.\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 for 1.75mm filament. The internal bore is CNC-machined to a surface finish of less than 0.3μm, ensuring smooth, low-friction filament feeding for reliable extrusion.\u003c\/p\u003e\n\u003ch4\u003eQ: Why does the copper section have dark spots? Is the heat break defective?\u003c\/h4\u003e\n\u003cp\u003eA: No — copper naturally oxidizes when exposed to air, which can produce dark or black surface spots. This is a normal property of copper and is purely cosmetic. It has absolutely no effect on the heat break's thermal performance or function. If surface appearance is a concern for you, please keep this in mind before purchasing.\u003c\/p\u003e\n\u003ch4\u003eQ: How does the bimetal design improve printing performance over a standard stainless steel heat break?\u003c\/h4\u003e\n\u003cp\u003eA: The NF-CTC combines copper's high thermal conductivity at both ends with titanium's excellent heat-resistance in the middle. The copper M6 end helps filament melt more efficiently in the hot zone, while the titanium central tube limits heat transfer upward into the cold zone — reducing heat creep, improving retraction performance, and lowering the chance of jams or clogs compared to stainless steel heat breaks.\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\": \"Is the Mellow NF-CTC heat break compatible with standard V6 hotends?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, the Mellow NF-CTC bimetal heat break is designed specifically for the V6 hotend platform. It uses an M7 thread on the heat sink end and an M6 thread on the heating block end — standard V6 sizing. Note that after installation it will extend approximately 3mm longer than the stock heat break, so minor adjustments to your nozzle fan duct or part cooling setup may be required.\"}}, {\"@type\": \"Question\", \"name\": \"What filament diameter does this heat break support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This heat break is designed for 1.75mm filament. The internal bore is CNC-machined to a surface finish of less than 0.3μm, ensuring smooth, low-friction filament feeding for reliable extrusion.\"}}, {\"@type\": \"Question\", \"name\": \"Why does the copper section have dark spots? Is the heat break defective?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No — copper naturally oxidizes when exposed to air, which can produce dark or black surface spots. This is a normal property of copper and is purely cosmetic. It has absolutely no effect on the heat break's thermal performance or function. 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