Bondtech INDX: The Complete Guide to Multi-Material 3D Printing (2026)

Last verified: July 6, 2026

The Bondtech INDX is an automatic tool-changing system for FDM 3D printers. It lets a printer switch between small, passive nozzles, so one machine can print with multiple materials, colors, and nozzle sizes while creating very little purge waste.

INDX uses wireless induction heating and contactless temperature sensing. It was publicly shown at Formnext 2025, reached early Founders Edition users in 2026, and is now rolling out through Prusa CORE One kits plus a Development Kit path for DIY and Voron-style printers.

Quick specs

This guide explains how INDX works, what it costs, which printers it supports, and how it compares with systems like the Prusa MMU3, Bambu AMS, and Prusa XL toolchanger.

How INDX works: one smart head, many simple tools

Most multi-material 3D printing systems work in one of two ways.

The first type is a filament switcher, like the Prusa MMU3 or Bambu AMS. These systems use one nozzle for all materials. Every time the printer changes color or material, it has to push the old filament out of the nozzle. This creates waste and slows the print down.

The second type is a full toolchanger, like the Prusa XL. These systems give each material its own full printhead. That helps reduce waste, but it also makes the system heavier and more expensive.

INDX uses a different setup. A simple way to think about it is like an electric shaver. The printer has one main body with the expensive parts, and several small heads that can be swapped in and out.

The Smart Toolhead is the active part of the system. It holds the extruder drive, induction coil, sensors, and electronics. This is the main part that moves above the print bed.

The Thin Passive Tools are the parts that get swapped. Each tool has a filament path, a nozzle, and a heatsink. It does not have a heater cartridge, thermistor, motor, wires, or electrical contacts. The tools park in a row at the front of the printer. They are spaced 35 mm apart, which allows 8 tools to fit inside a CORE One frame.

When the Smart Toolhead picks up a passive tool, the induction coil heats the nozzle directly. It does this without needing physical contact. An infrared sensor reads the nozzle temperature, also without contact.

Because the nozzles are small and have low thermal mass, they heat up very quickly. They also cool down quickly when parked. This helps prevent parked nozzles from oozing plastic onto the print.

The extruder is also designed to handle different materials. Bondtech's Dynamic Dual Drive adjusts its grip on the filament in real time. This helps it print soft materials like TPU and stiff materials like carbon-fiber nylon without needing manual changes between materials.

A full tool change takes roughly 12 to 14 seconds. During that time, the printer parks the current tool, moves to the next one, picks it up, heats it, primes if needed, and starts printing again.

INDX vs. everything else

Here is how INDX compares to the main systems it competes with:

Compared to the Prusa MMU3. The MMU3 is much cheaper and supports 5 filaments. But every color change has to go through one shared nozzle. That means unloading, purging, and reloading filament. It can work well for simple two-color prints, but it becomes slow and wasteful for heavy multicolor printing. INDX costs more upfront, but it avoids most of that purge waste.

Compared to the Bambu AMS. The AMS helped make multicolor printing popular. But it still uses one shared nozzle. That is why Bambu printers often create a pile of purged filament during multicolor prints. INDX uses separate nozzles, so it creates much less waste. The downside is that INDX does not work on Bambu printers.

Compared to the Prusa XL. The Prusa XL is the closest match because it is also a true toolchanger. It uses dedicated nozzles and creates very little waste. The main difference is cost and size. Each XL toolhead is a full printhead, so each added tool costs more. INDX tools are simpler and cheaper. That is how INDX can offer up to 8 tools at a lower price than a 5-tool Prusa XL. The XL still has a larger build volume and fast tool changes.

What INDX actually costs

These prices are for the Prusa Edition conversion kit for the CORE One and CORE One+ as of July 2026.

The most important number is not just the kit price. It is the cost of adding more materials.

Because the passive tools have no electronics, going from 4 tools to 8 tools costs $250 in the US. That works out to about $62 per added material slot. On a full toolchanger, each extra material needs another full printhead, which can cost several hundred dollars.

That low cost per tool is one of the biggest reasons INDX is interesting.

A few pricing details matter before you buy:

• Demand is higher than supply right now. The first Prusa Edition batch sold out during its launch weekend in April 2026. More batches are expected as production grows.
• A 4-tool-to-8-tool upgrade kit is planned, but not available yet. Individual tools are also planned. So if you think you will want 8 tools later, the 8-tool kit is the safer choice.
• The Development Kit is priced separately. This kit is for DIY and Voron-style machines. Bondtech has said it will cost more than the limited Founders Edition.
• You need a CORE One or CORE One+ for the Prusa Edition kit. If you do not already own one, include the printer price in your total cost.

Which printers support INDX?

Prusa CORE One and CORE One+ are the main supported printers. Bondtech and Prusa worked together on this system. Bondtech made the Smart Toolhead and passive tools. Prusa handled the printer hardware, firmware, and PrusaSlicer support.

On a CORE One, INDX should feel more like a built-in feature than a random add-on. But it is still a conversion kit, not a simple plug-in accessory. Early users and Prusa comments point to installation taking several hours, and Prusa provides a step-by-step guide for the supported kit.

Prusa CORE One L support is planned for later in 2026. Fully assembled printers with INDX already installed are also planned. These may be worth waiting for if you do not want to convert the machine yourself. Prusa has said the larger CORE One L may physically support up to 10 tools, but the final plan is still being worked out.

Voron, RatRig, and other DIY printers are supported through the INDX Development Kit. Orders for that kit opened on July 3, 2026. Bondtech designed INDX to work with open firmware like Klipper, Kalico, and RepRapFirmware.

This DIY path is for experienced builders. It is not the same as buying a polished consumer upgrade.

Bambu Lab printers are not supported. INDX needs deep control over the printer's motion system, firmware, and slicer. Closed systems like Bambu do not give outside hardware makers that level of access.

There is also one build-volume tradeoff. The tool parking row takes up some space inside the printer. On the CORE One, community reports say the Y axis loses about 28 mm. Most prints will not be affected, but large bed-spanning parts may be.

Setting up INDX: what to expect

On the CORE One, setup follows a guided process.

1. Install the hardware. You replace the stock toolhead with the INDX Smart Toolhead. You also install the tool parking docks, a new front panel, and spool management for up to 8 filaments. This is the longest part of the process.
2. Run the first setup wizard. The firmware walks you through the first setup steps. Prusa also has a video guide for this part.
3. Let the printer calibrate the tools. INDX measures the exact position of each tool automatically. It uses the loadcell for Z height and an inductive or eddy-current sensing system for X and Y. It scans several times to reduce errors.
4. Slice the print. PrusaSlicer and Prusa EasyPrint handle tool assignment. They also support ColorMix, which can blend colors using CMY, black, and white filaments.

The automatic tool calibration is important. Older toolchanger systems often needed careful manual calibration. If the tools were not lined up correctly, the print could fail or look messy. INDX does this calibration automatically at the start of each print after cleaning the nozzle.

That removes one of the biggest maintenance problems with toolchangers.

The waste problem INDX solves

If you have seen a Bambu printer with an AMS make a multicolor print, you have probably seen the pile of purged filament behind the printer.

That waste is not just a Bambu problem. It is a shared-nozzle problem. When one nozzle prints every material, the printer has to flush out the old material before the new one is clean. On prints with hundreds of color changes, the waste can sometimes weigh more than the model itself.

INDX avoids this problem by giving each material its own tool and nozzle. When the printer switches materials, it switches tools. The old material does not need to be flushed out of the new material's nozzle because they do not share the same melt path.

This means less waste and less color contamination. It also helps when printing different types of materials, because leftover material from one nozzle does not mix with the next one.

"Near-zero waste" is more accurate than "zero waste." The system still does small wipe and prime moves. It also uses a nozzle cleaner during calibration. But compared with purge towers and purge bins, the difference is major.

What can you actually print with it?

Multicolor prints are the most obvious use, but INDX can do more than that.

Rigid and flexible materials in one part. You could print a strong carbon-fiber nylon part with TPU grips, gaskets, or hinges built in. The Dynamic Dual Drive extruder helps handle both stiff and soft materials.

Soluble supports. PVA or BVOH support material can be printed under PLA or PETG parts. After printing, the supports dissolve in water. This can leave cleaner surfaces on difficult shapes. Since the support material has its own nozzle, there is less risk of contamination.

Different nozzle sizes in one print. INDX can use one nozzle size for fine outer details and another larger nozzle for fast infill. For example, a 0.4 mm nozzle could print the outside walls, while a 0.8 mm nozzle prints the inside faster. This can save time without hurting surface quality.

Cleaner multicolor prints. INDX can print up to 8 colors with clean material changes. Prusa's ColorMix mode can also blend colors using translucent CMY filaments, black, and white.

Loaded material stations. Even when printing one material at a time, having several tools loaded can save time. You can keep different materials or nozzle sizes ready and switch between jobs with less manual work.

Availability and release timeline

INDX has been released in stages.

• November 2025: INDX was publicly shown at Formnext. Founders Edition pre-orders opened through Bondtech. This was a limited run and sold out.
• Q1 to May 2026: Founders Edition production moved through final QA after a short delay.
• April 23, 2026: Prusa Edition conversion kit orders opened for the CORE One and CORE One+. The first batch sold out over the launch weekend.
• July 3, 2026: Prusa said Founders Edition units were in early users' hands, and standard CORE One / CORE One+ INDX kits were scheduled to start leaving the factory by the end of July, with the full first batch targeted by the end of August.
• July 3, 2026: INDX Development Kit orders opened for DIY and Voron-style printers.
• Later in 2026, planned: CORE One L conversion kits, fully assembled INDX printers, a 4-to-8-tool upgrade kit, and individual tools are expected.

Where to buy: The Prusa Edition kit is sold through Prusa's e-shop. The Development Kit is sold through Bondtech's site. Since batches have sold out quickly, stock notifications are useful if a batch is not available.

Verdict: who should buy INDX?

Buy it if you own a CORE One or CORE One+ and want multi-material printing. INDX offers low waste, native Prusa support, and lower per-tool costs than a full toolchanger. The 8-tool kit is the better value if you think you may want more than 4 materials.

Wait if you want a CORE One L or a pre-built INDX printer. Both are planned for later in 2026. If you do not want to convert a printer yourself, waiting may make sense.

Use caution if you are on Voron or another DIY printer. The Development Kit exists, and firmware support is real. But this is still an early builder path. It is not as simple as buying a finished consumer product.

Skip it if you use a Bambu printer. INDX will not work on Bambu machines. If low-waste multicolor printing matters a lot to you, INDX may be a reason to consider a different platform for your next printer.

Skip it if you only print one material on a budget printer. INDX solves multi-material problems. If you mostly print single-color PLA, it is probably not worth the money.

INDX still has first-generation limits. Demand is higher than supply. Individual tools and upgrade kits are not available yet. Early units also had a shipping delay because of a component fix. That delay may be a good sign for quality control, but it is still a reminder that this is a new product.

Even with those limits, INDX is one of the most important new multi-material systems in desktop FDM printing. It brings toolchanger-style printing closer to filament-switcher pricing.

FAQ

Does the Bondtech INDX work with Bambu Lab printers?

No. INDX needs deep firmware and motion-system support. Bambu's closed ecosystem does not allow that. INDX supports the Prusa CORE One and CORE One+ natively. It also supports open-firmware DIY printers through the Development Kit.

Can I upgrade a 4-tool INDX kit to 8 tools later?

An official 4-to-8 upgrade kit is planned, but it is not available yet as of July 2026. Until it ships, choose your tool count carefully. If you think you may want 8 tools, the 8-tool kit is the safer choice.

How fast is an INDX tool change?

A full tool change takes roughly 12 to 14 seconds, depending on the temperature target, priming, travel moves, and printer setup.

Does INDX reduce the CORE One's build volume?

Yes, slightly. The tool parking row takes up some space. Community reports say the CORE One loses about 28 mm on the Y axis. Most prints will not be affected, but very large prints might be.

Do I need to calibrate tool offsets manually?

No for the supported Prusa CORE One workflow. INDX automatically calibrates tool offsets at the start of each print. It uses the loadcell for Z and a sensing system for X and Y.

Is INDX open source?

Partly. The core technology is patented. Bondtech says it supports open-source collaboration and non-commercial projects, and INDX supports open firmware like Klipper, Kalico, and RepRapFirmware. Commercial use of the patented parts of the system requires licensing.

How long does installation take?

Expect several hours for the CORE One conversion. It is a real hardware upgrade with a new Smart Toolhead, dock panel, tool holders, and filament management. Follow Prusa's official setup guide.

Sources

• Bondtech INDX official page and FAQ
• Prusa Research blog: Prusa CORE One INDX orders open
• Prusa Research blog: State of INDX, July 2026 update
• Prusa e-shop: Bondtech INDX product page
• TCT Magazine: Bondtech and Prusa unveil multi-material upgrade
• All3DP: INDX Development Kit orders open

Spot an outdated price or availability detail? INDX is moving fast. Check the official sources above for the current status. We re-verify this page quarterly.