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Bambu Lab High-flow Hotend (H3C)
The Bambu Lab High-flow Hotend is a drop-in upgrade for the Bambu Lab H3C printer, engineered to push significantly more plastic through the melt zone without sacrificing surface quality. Available in 0.4 mm, 0.6 mm, and 0.8 mm sizes, it lets you mix high-flow and standard-flow hotends in the same print to balance speed and fine detail.
With an HRC 55+ hardened steel nozzle that's hardened through rather than coated, this hotend stands up to carbon fiber, glow-in-the-dark, metal fill, and other abrasive materials — print after print.
Key Features
Up to 30% faster prints
An optimized melt zone delivers up to 62.5% higher max volumetric speed and reduces print time by up to 30%. The larger your model, the more time you save — especially on parts with extensive infill.
High-speed precision
Unlike typical high-flow hotends, Bambu's design keeps extrusion high and consistent. That means crisp edges, clean textures, and smooth surfaces — no under-extrusion, no loss of detail, even at top speeds.
Built for abrasive filaments
Carbon fiber, glow-in-the-dark, and metal-fill filaments chew through brass nozzles. This hotend uses HRC 55+ hardened steel, hardened through rather than surface-coated, so the orifice holds its shape over the long haul.
Mix and match on one print
The H3C supports mixing hotends of different sizes and flow rates — standard and high-flow — within a single print. Use a 0.4 mm standard nozzle for fine outer walls and a high-flow 0.8 mm for infill to get the best of both worlds.
Max Volumetric Speed by Material
Volumetric speed (mm³/s) by hotend and filament, compared against the standard 0.4 mm hotend.
| Hotend | PLA Basic | PLA Matte | PETG HF |
|---|---|---|---|
| Bambu Standard Flow Hotend (0.4 mm) | 24 mm³/s | 28 mm³/s | 24 mm³/s |
| Bambu High Flow Hotend (0.4 mm) | 40 mm³/s | 48 mm³/s | 32 mm³/s |
| Bambu High Flow Hotend (0.6 mm) | 40 mm³/s | 40 mm³/s | 40 mm³/s |
| Bambu High Flow Hotend (0.8 mm) | 40 mm³/s | 40 mm³/s | 40 mm³/s |
Compatibility
Designed exclusively for the Bambu Lab H3C printer. Not compatible with X1, P1, A1, or H2D hotend mounts.
Filament Compatibility
Recommended material support by hotend size. ✓ = recommended, ✗ = not supported.
| Filament | 0.4 mm HF | 0.6 mm HF | 0.8 mm HF |
|---|---|---|---|
| PLA Basic / Matte / Pure / Lite / Tough+ | ✓ | ✓ | ✓ |
| PETG Basic / Matte / HF / Translucent | ✓ | ✓ | ✓ |
| ABS / ASA | ✓ | ✓ | ✓ |
| PC / PC FR | ✓ | ✓ | ✓ |
| PLA Marble / Metal / Sparkle / Galaxy / Glow / Wood | ✓ | ✓ | ✓ |
| PLA Silk / Silk+ / Silk Dual Color | ✓ | Not recommended | Not recommended |
| PLA Aero / ASA Aero | ✓ | Not recommended | Not recommended |
| PLA-CF | Not recommended | ✓ | ✓ |
| PETG-CF | Not recommended | ✓ | ✓ |
| ASA-CF / PA6-CF / PA6-GF / PAHT-CF / PET-CF / PPA-CF / PPS-CF | Not recommended | ✓ | ✓ |
| ABS-GF | ✓ | ✓ | ✓ |
| TPU for AMS / TPU 95A HF | ✓ | ✓ | ✓ |
| TPU 90A / 85A | Not recommended | Not recommended | Not recommended |
| TPU 75A (2.85 mm) / Generic TPU (2.85 mm) | ✗ | ✗ | ✗ |
| Support for PLA / PLA-PETG / ABS / PA-PET / PVA | ✓ | ✓ | ✓ |
Installation Notes
Installation is quick with the included hardware. Please refer to the Bambu Lab Wiki for the full step-by-step procedure specific to the H3C toolhead.
Note: PLA Silk Dual Color is prone to flipping during multi-color printing, which can cause color bleeding. Avoid using it for multi-color prints. The 2.85 mm hotend is only for 2.85 mm flexible filaments — Bambu Studio currently provides only two presets: Bambu TPU 75A (2.85 mm) and Generic TPU (2.85 mm).
Product Specifications
Hotend
| Compatible Printer | Bambu Lab H3C |
|---|---|
| Nozzle Sizes | 0.4 mm, 0.6 mm, 0.8 mm |
| Nozzle Material | Hardened steel, HRC 55+ |
| Max. Printing Temp. | 350 °C |
| Length | 49.2 mm |
Packaging
| Packaging Weight | 0.026 kg |
|---|---|
| Packaging Size | 60 × 60 × 30 mm |
What's in the Box
- High-flow Hotend
- 3 x M2 × 5 Screw
- Toolhead Motor Unlock Sleeve
