Mellow NF-CTC Bimetal Heat Break – Copper & Titanium V6 1.75mm
Mellow NF-CTC Bimetal Heat Break – Copper & Titanium V6 1.75mm
Mellow NF-CTC All-Metal Bimetal Heat Break for V6 Hotend – 1.75mm
Upgrade your 3D printer's hotend with the Mellow NF-CTC Bimetal Heat Break — engineered from a premium combination of copper and titanium (TC4) for superior thermal performance, reduced clogging, and improved print quality. Designed as a direct upgrade for the popular V6 hotend platform with 1.75mm filament compatibility.
Why Upgrade to the Mellow NF-CTC Bimetal Heat Break?
Traditional 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 three-zone bimetal design:
- M6 Copper Heating End: Copper's excellent thermal conductivity helps filament transition into the melt zone faster, boosting flow rate and melting efficiency compared to pure titanium designs.
- Central Titanium (TC4) Tube: The titanium mid-section acts as a thermal barrier, minimizing heat creep upward into the cold zone — dramatically reducing jams and heat-related clogs.
- M7 Copper Heat-Sink End: Copper rapidly transfers heat to the heat sink, maximizing cooling efficiency and keeping the cold zone cold where it matters most.
Precision Manufacturing
The central titanium tube is produced by high-precision CNC machining, with an internal surface finish of less than 0.3μm. 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.
Tested Performance
- Hotend Temperature: 212.3°C
- Test Duration: 10 minutes
- Ambient Temperature: 28.5°C
- Temperature Sensor: K-Type thermocouple
- Assembled on: V6 hotend with 3010 fan & 12V 40W heating tube
Key Specifications
- Material: Copper & Titanium (TC4)
- Filament Diameter: 1.75mm
- Heat End Thread: M7 (copper)
- Heating End Thread: M6 (copper)
- Total Length: 25mm
- Internal Finish: <0.3μm (high-precision CNC)
- Model Number: 11V6CTCT
- Made in Mainland China
Important Installation Notes
- Assembly is required.
- After installation on a V6 heat sink, the heat break will sit 3mm longer than the original version — you may need to adjust your nozzle fan distance or duct accordingly.
- Copper naturally oxidizes in air and may develop dark spots over time. This is cosmetic only and does not affect performance. If surface oxidation is not acceptable to you, please consider this before purchasing.
What's in the Box?
- 1× Mellow NF-CTC Bimetal Heat Break (Copper & Titanium)
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Frequently Asked Questions
Q: Is the Mellow NF-CTC heat break compatible with standard V6 hotends?
A: 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.
Q: What filament diameter does this heat break support?
A: 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.
Q: Why does the copper section have dark spots? Is the heat break defective?
A: 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.
Q: How does the bimetal design improve printing performance over a standard stainless steel heat break?
A: 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.
Production & Packaging Notice
To 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.