Bambu Lab Filament Track Switch — H2D

Bambu Lab Filament Track Switch — H2D

Dual-nozzle printing on the H2D is brilliant until the slicer asks for a colour that happens to be sitting on the wrong side of your setup. Normally that means pulling a spool out of the AMS, re-routing a PTFE tube, and starting again. The Filament Track Switch (part SA016) removes that step entirely.

It's a compact motorised routing box that sits between your AMS and the printer, with two inlets and two outlets. It unbinds the AMS from a specific nozzle, so any filament can feed into either hotend according to the assignment in Bambu Studio — no spool swapping, no tube reconnection, and the mapping can change mid-print. Bambu's own documentation puts it plainly: with the Filament Track Switch, a single AMS can support dual-nozzle printing and switch filament between the left and right hotends.

If you run multi-colour work, soluble or dedicated support material on one nozzle, or two different materials in the same job, this is the accessory that makes an H2D feel genuinely automatic.

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Key features

• Frees the AMS from the nozzle it's plumbed to. Load your spools once and let the slicer decide which hotend gets what — including changes partway through a job.
• Fewer failed multi-colour prints. Removes the most common dual-extrusion mistake: a filament physically connected to the nozzle the slicer didn't assign it to.
• Motorised, printer-controlled. A single 6-pin cable handles power and signalling from the printer — no separate supply, no AU plug pack required.
• Everything you need to fit it. Four PTFE tubes in two lengths and both screw types are in the box, so there's no second order to place.
• Works best with two AMS units. Two separate feeds into the two inlets lets the switch keep two filaments loaded at once. A single AMS still works — it feeds alternately rather than simultaneously.

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Who it's for

• Multi-colour makers running four or more colours across an H2D's two nozzles.
• Small businesses and print farms where the operator shouldn't need to re-plumb a printer between jobs — a real time saver if someone other than you loads the machine.
• Schools and makerspaces wanting fewer student-facing steps and fewer mis-routed filament mistakes.
• Dual-material printers pairing a model material on one nozzle with support or a second engineering material on the other.

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What's in the box

• Filament Track Switch × 1
• 6-pin cable × 1
• PTFE tube, 700 mm × 2
• PTFE tube, 400 mm × 2
• ST3×10 screw × 4 (2 used for installation, 2 spare)
• BT2×8 screw × 2

Please note: the mounting holder is not included — Bambu Lab publishes model-specific printable holders (including a dedicated H2C/H2D design) on MakerWorld, so you print your own before fitting. Handy, given what the printer in front of you does for a living.

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Before you fit it — materials & routing

• Update your firmware first. H2D support requires printer firmware v01.04.00.00 or later, released 26 August 2026, along with Bambu Studio v2.8.1.55+ or Handy v3.24.0+.
• Use the correct PTFE. Bambu specifies tube with a 2.5 mm internal / 4 mm external diameter. Off-spec tube is the number-one cause of feeding failures through the switch — the supplied tubes are already the right size.
• Keep tube runs short. AMS-to-switch runs should stay under 700 mm. The switch adds resistance to the filament path, and over-long tubing eats into the buffer's tolerance.
• Go easy on fragile filaments. Bambu advises keeping feed-sensitive materials such as PLA-CF, PLA Glow and PLA Silk off the switch and feeding them by a direct path instead.
• External spools aren't supported. Dynamic mapping doesn't work with an external spool — remove the switch for those jobs.

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Specifications

Part number	SA016
Compatibility	Bambu Lab H2D (same part also listed for H2C and X2D)
Minimum firmware (H2D)	v01.04.00.00
Software required	Bambu Studio v2.8.1.55+ / Bambu Handy v3.24.0+
Routing design	2 inlets / 2 outlets
Materials	Plastic, Metal
Colour	Black
Connection	6-pin cable to printer (powered by the printer — no separate AU plug pack)
PTFE tube specification	2.5 mm ID / 4 mm OD (for 1.75 mm filament)
Max AMS-to-switch tube length	Under 700 mm
Packaging size	150 × 110 × 50 mm
Barcode	6937285513762

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