Attributes

Brand	-
Category	Root / Office Equipment, Supplies & Services
Origin	-
Compatibility	Bambu Lab X1, X1-Carbon, P1P, P1S
Nozzle Material	Hardened Steel
Nozzle Diameter	0.4mm (TZ4.0 Standard)
Design Type	Integrated High-Flow Hotend
Max Temperature	300°C
Thermal Conductivity	Optimized for Rapid Melting
Filament Support	PLA, PETG, ABS, ASA, Carbon Fiber, Glass Fiber
Installation	Tool-free Quick Swap
Durability	High Wear Resistance for Abrasive Filaments
Package Contents	1x Mellow TZ4.0 Integrated Hotend

6 reviews

Anonymous

Mar 22, 2026

Rating: 5/5

Easy Installation and Great Flow

The integrated design makes swapping hotends on my X1-Carbon incredibly fast. No more struggling with tiny screws. The high-flow design seems to handle higher speeds without losing quality.

Anonymous

Mar 20, 2026

Rating: 4/5

Good Performance, Runs Hotter

Performance is great for high-speed printing. Just note that because it's hardened steel, it retains heat differently than brass, so ensure your cooling fan settings are optimized for the material you are using.

Anonymous

Mar 16, 2026

Rating: 4/5

Solid Upgrade, Slight Tuning Needed

Great build quality and the hardened steel feels robust. I had to tweak my pressure advance settings slightly to get the corners as sharp as the stock nozzle, but once dialed in, it prints beautifully.

Anonymous

Mar 08, 2026

Rating: 5/5

Reliable for Industrial Prototyping

We use these in our office for rapid prototyping with glass-filled nylon. The durability is outstanding compared to brass nozzles which would clog or wear out quickly. Worth every penny.

Anonymous

Mar 05, 2026

Rating: 5/5

Best Hotend for Bambu Lab Printers

If you plan on printing anything other than basic PLA, get this hotend. The heat distribution is even, and the Mellow brand quality is evident. My P1S has never run smoother.

Anonymous

Mar 01, 2026

Rating: 5/5

Perfect for Carbon Fiber Filaments

I switched to this hardened steel nozzle specifically for printing with carbon fiber filled PLA. The flow is excellent, and there are no signs of wear after several kilograms of print. Highly recommended for abrasive materials.

5 FAQ

Q: What is the expected lifespan compared to a brass nozzle?

A: For abrasive filaments like carbon fiber or glow-in-the-dark, the hardened steel nozzle can last 5 to 10 times longer than a brass nozzle. For non-abrasive filaments, the lifespan is effectively indefinite under normal usage.

Q: Do I need to recalibrate my printer after installation?

A: It is highly recommended to run the full calibration process, including flow rate calibration and vibration compensation, after installing a new hotend to ensure optimal print quality and dimensional accuracy.

Q: Can I use this nozzle with standard PLA at low temperatures?

A: Yes, absolutely. While it is designed for high-temperature and abrasive filaments, it works perfectly fine with standard PLA. You may just need to adjust your temperature profile slightly as steel conducts heat differently than brass.

Q: Does this come with a silicone sock?

A: This specific integrated hotend unit does not include a separate silicone sock as the heating block design differs from the stock version. However, third-party socks compatible with the Mellow TZ series are available if needed for insulation.

Q: Is this compatible with the Bambu Lab A1 mini?

A: No, the TZ4.0 Integrated Hotend is specifically designed for the X1, X1-Carbon, P1P, and P1S series. The A1 mini uses a different hotend assembly.

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