Phaetus Dragon UHF Hotend – Ultra‑High‑Flow for VORON, Prusa & High‑Speed 3D Printing
The Phaetus Dragon UHF is the high-flow evolution of the beloved Dragon hotend, purpose-built for high-speed 3D printing where volumetric flow is the bottleneck. With an extended plated-copper heatblock and a Volcano-style extension nut, the Dragon UHF achieves flow rates up to 70.5 mm³/s — making it ideal for fast VORON builds, speed-focused Prusa upgrades, and engineering-grade filament work.
DigMach is an authorized US reseller for Phaetus. Every Dragon UHF sold here is genuine, warranty-backed, and ships from our Seattle, WA warehouse. No customs delays, no grey-market risk, no counterfeits.
Compatible with standard V6-thread nozzles, so there's no proprietary ecosystem to lock into. Swap nozzles one-handed using the low-conductivity titanium screws — no tools, no burns.
Key Specs
- Flow rate: up to 70.5 mm³/s
- Heatbreak: titanium alloy, 0.25 mm wall thickness
- Nozzle compatibility: V6 thread (standard)
- Printer compatibility: VORON 2.4, VORON Trident, Prusa MK3/MK3S, any V6-mount toolhead
- Extruder compatibility: BMG, Titan, Orbiter, and most direct-drive/bowden setups
- Filament compatibility: PLA, ABS, ASA, PETG, TPU, Nylon (PA), PC, PEEK, PEI, PA-CF, PLA-CF, PETG-CF, and other fiber composites
- Max Operating Temperature: 500°C
- Heater: 24V / 40W cartridge
- Thermistor: NTC 100K (ATC Semitec 104GT-2 or Generic 3950 — confirm your variant)
- Nozzle Thread: M6 (E3D V6 standard)
- Toolhead Fit: VORON StealthBurner, VORON AfterBurner (Dragon mount, no adapter needed)
All-metal construction makes this one of the best hotends for abrasive and high-temperature filaments. No PTFE in the melt zone means no off-gassing and no degradation above 240°C.
Pair the Dragon UHF with a Phaetus hardened steel nozzle for abrasive filaments, or complete your build from our hotend parts collection. Building a VORON? Start with our VORON 2.4 kit or VORON Trident kit.
Open-Box Available — Save $10
These units are customer returns or customs-opened packages. All are fully inspected and include all accessories. Use code OPENBOX10 at checkout.
Frequently Asked Questions
Is the Dragon UHF compatible with my VORON 2.4 or Trident?
Yes. The Dragon UHF uses a standard V6 mount and fits directly into VORON 2.4 and Trident toolheads without modification. It's one of the most popular hotend upgrades in the VORON community.
What's the difference between the Dragon HF and Dragon UHF?
The UHF (Ultra-High-Flow) features an extended Volcano-style heatblock that roughly doubles the melt zone length compared to the standard Dragon HF. This allows flow rates up to 70.5 mm³/s versus ~30 mm³/s on the HF — a major difference for high-speed printing. The tradeoff is a slightly longer hotend assembly, so check toolhead clearance before swapping.
What nozzles work with the Dragon UHF?
Any standard V6-thread nozzle. This includes brass, hardened steel, and ruby-tipped nozzles from most major brands. No proprietary nozzles required.
Can I print abrasive filaments like PA-CF or PETG-CF?
Yes, but pair it with a hardened steel or wear-resistant nozzle — brass nozzles will wear quickly with fiber-filled filaments. The all-metal, PTFE-free design handles high-temp abrasive materials without issue.
What thermistor type should I configure in Klipper for the Dragon UHF?
Set your sensor_type in Klipper's printer.cfg to either Generic 3950 or ATC Semitec 104GT-2 depending on the variant shipped. Check the thermistor lead color or included documentation to confirm. Both are NTC 100K class thermistors. Set max_temp to 300 for most materials; raise to 500 only for high-temp engineering filaments.
Does the Dragon UHF work well with Klipper input shaping and pressure advance?
Yes — the Dragon UHF is purpose-built for high-speed Klipper printers running input shaping. The extended melt zone means you may need to tune your pressure advance value slightly higher than with a standard Dragon or V6. Run a pressure advance calibration print after installation. The all-metal construction has no thermal limitations that interfere with sustained high-acceleration printing.
Do you ship from the US?
Yes. All orders ship from our Seattle-area warehouse or US fulfillment centers. No customs delays, no overseas transit times.