0.8mm High Flow Hardened Steel Hotend for Bambu Lab H2 & P2S

Name: Bambu Lab High Flow Hotend for H2 / P2S / X2D - 0.8mm Hardened Steel Nozzle – Speed & Durability
Brand: Bambu Lab
SKU: 34003
Price: 52.99 USD
Availability: InStock

Bambu Lab High Flow Hotend for H2S / H2D / P2S - 0.8mm Hardened Steel Nozzle

Bambu Lab High Flow Hotend for H2 / P2S / X2D - 0.8mm Hardened Steel Nozzle – Speed & Durability

$52.99

SKU 34003 MPN FAH065

Confirmed fit

H2D
H2D Pro
H2S
H2C
P2S
X2D

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The Bambu High Flow Hotend (0.8mm Hardened Steel) is the heavyweight for speed and volume. Combining the 0.8mm nozzle diameter with an optimised high-flow melt zone, it delivers maximum throughput for large-scale models and abrasive industrial materials.

This is a fully integrated, high-performance unit — nozzle, heater and heat break are inseparable — designed for a seamless, toolless installation into your toolhead.

Features

Extreme High Flow Performance: Engineered for maximum volumetric speed. The 0.8mm bore is the choice for industrial-scale parts, thick layer heights, and slashing print times on your largest projects.
Hardened Steel Durability: Extreme wear resistance against abrasive engineering filaments like Carbon Fiber (PA-CF), Glass Fiber (PA-GF) and glow-in-the-dark materials, without widening or clogging.
Integrated Quick-Swap Design: Replace the whole hotend without messy wiring or thermal paste.

Before You Buy

Dual-nozzle machines (H2D / H2D Pro): Both installed hotends must be the same size — two 0.8mm units; mixing a 0.4mm and a 0.8mm is not supported.
H2 Changer (H2C): This hotend fits the Left (Lifting) hotend position ONLY.
H2D Pro owners: Your machine ships with tungsten carbide nozzles from the factory. Hardened steel fits and performs well, but it is a step down in wear resistance — a change of specification, not a like-for-like replacement.
Not compatible with Bambu Lab P1 or X1 series printers — those use a different toolhead entirely.

Compatibility Table

Printer Model	Works with this Hotend?	Notes
H2S	Yes	Full compatibility
H2D	Yes	Works on both Left & Right slots
H2D Pro	Yes	Both slots — but replaces the factory tungsten carbide nozzle
H2C	Partial	Left (Lifting) hotend ONLY
P2S	Yes	Full compatibility
X2D	Yes	Full compatibility

Real-World Maker Tips (Large Format Printing)

Strength Over Detail: The 0.8mm nozzle isn't just about speed — thicker walls and wider extrusion lines create significantly stronger bonds, making this the go-to for functional, load-bearing parts.
Dial in Your Cooling: You are pushing a lot of molten plastic, so make sure the cooling fans are performing at their peak. With PLA you may need to slow down slightly on fine details to let the plastic set.
Check Your Slicer: Select the correct "0.8mm Nozzle" profile after swapping. Layer heights can now safely go up to 0.6mm for fast prototyping.

Specifications

Feature	Specification
Nozzle Diameter	0.8 mm
Material	Hardened Steel
Flow Tech	Optimised High Flow melt zone
Assembly Type	Integrated (nozzle + heater + throat)
Colour	Black / Metal

What's in the Box

1x High Flow Hotend — 0.8mm Hardened Steel

High Flow hotend

More flow, same tool-free swap

Bambu rates the 0.4 mm High Flow hotend at 40 mm³/s in PLA Basic, against 24 for Standard Flow. It latches into your H2 Series, P2S or X2D toolhead the same way: by hand, once cooled.

Heatsink Marked HF.8HF = High Flow. Standard Flow units carry the size alone.

Heat block Latches into the toolhead heaterHeater and thermistor stay in the printer, so swaps are tool-free.

Nozzle Hardened steel · 0.8 mmFastest option for large CF/GF and engineering parts.

Heatsink Marked HF.8HF = High Flow. Standard Flow units carry the size alone.
Heat block Latches into the toolhead heaterHeater and thermistor stay in the printer, so swaps are tool-free.
Nozzle Hardened steel · 0.8 mmFastest option for large CF/GF and engineering parts.

About this product

Can I install this on just one side of my H2D, or do both hotends need to match?

On dual-nozzle machines like the H2D and H2D Pro, both installed hotends must be the same size — Bambu is explicit that mixing a 0.4mm and this 0.8mm unit is not supported. If you want the 0.8mm's speed and strength benefits, plan to order two units for a matched pair rather than upgrading a single slot.

I own an H2D Pro — will this hotend actually be an upgrade for me?

Not exactly an upgrade — it's a tradeoff. The H2D Pro ships with tungsten carbide nozzles from the factory, which have superior wear resistance to hardened steel. This 0.8mm hardened steel hotend fits and performs well, but Bambu frames it as a change of specification rather than a like-for-like replacement, so expect somewhat faster wear on abrasive filaments than your factory tungsten carbide setup.

Does this work on the H2C changer setup?

Only partially — per Bambu's compatibility table, this hotend fits the H2C's Left (Lifting) hotend position only, not both slots. If you're outfitting an H2C for large-format or fiber-filled printing, confirm which slot you're upgrading before ordering, since the changer's two positions aren't interchangeable for this part.

What's the real benefit of an 0.8mm nozzle over a standard 0.4mm?

It's built for volume, not fine detail: the wider bore dramatically increases volumetric flow for large-scale parts and thick layer heights, cutting print time significantly on big projects. The thicker walls and wider extrusion lines also create stronger layer bonds, making it the better choice for functional, load-bearing parts over highly detailed miniatures or fine-feature prints.

Do I need to change any slicer settings after installing this?

Yes — select the correct '0.8mm Nozzle' profile in your slicer after swapping, since running the old 0.4mm profile will badly under-extrude or misjudge your line widths. With the wider nozzle you can also safely push layer heights up to 0.6mm for fast prototyping, and you may need to slow down slightly on fine details with PLA to let plastic set properly given the higher flow volume.

Is this compatible with my P1 or X1 series printer?

No — this hotend is explicitly not compatible with Bambu Lab's P1 or X1 series printers, which use a completely different toolhead design. It's built specifically for the H2-series and X2D/P2S platforms (H2S, H2D, H2D Pro, H2C left slot, P2S, X2D). Don't order this expecting it to fit an older Bambu printer family.

Good to know

Ordering & Shipping

We currently ship within the United States. Most in-stock orders placed before 12:00 PM CT ship the same business day.

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Need to change or cancel an order? Email us right away and we'll do our best to help before it ships.

Returns & Refunds

Unused, unopened parts can be returned within 30 days in their original packaging. A flat $4.99 return shipping fee applies — email us first and we'll send return instructions.

Received the wrong item or something arrived defective? Contact us right away and we'll make it right with a replacement or full refund, no return fee in that case. Full details on our return policy page.

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