One Toolhead. Countless Possibilities.
You Built Your Freedom.
INDX Expands Your Boundaries.
The automatic tool-changing system that lets you keep your printer, your firmware, and your freedom.
What INDX Does
Bondtech INDX is an automatic tool-changing system using wireless induction heating and contactless temperature sensing to enable thin, passive tools. This architecture delivers rapid filament swaps and contamination-free multi-material printing with adaptive Dynamic Dual Drive technology.
Material Versatility
Unmatched access to materials, colors, and nozzle sizes — all in a single print. Print technical filaments with soluble supports. Switch from 0.4mm to 0.8mm mid-print.
Universal Flexibility
Works with Klipper, Kalico, and RepRapFirmware. Your Voron? Enhanced, not replaced. Your custom firmware? Supported, not locked out. Your community mods? Celebrated, not controlled.
Creative Freedom
Load filaments once, print all day. Adaptive extrusion eliminates per-material tuning. Start with one Smart Toolhead. Expand to as many tools as your build demands.
What You Can Make
INDX gives you access to a wide range of material combinations, nozzle sizes, and colours in a single print. Here's what that looks like.
PLA · 5 colours
Colour changes with near zero waste.
Five distinct colors printed cleanly in a single run with no pile of purged plastic in your printer.
5 toolsPLA · 8 colours
Colour precision on functional parts.
Colour-coded functional prints that are as useful to read as they are to use without any post-processing.
8 toolsPLA · 4 colours
Hard base, detailed sculpture, single print.
Structural base and intricate colour detail printed together — no assembly, no painting required.
4 toolsPrint photography courtesy of Prusa Research. Printed with INDX for Core One.
Open by Design.
No proprietary plugins. No closed ecosystem. No hidden lock-in. INDX is built to work with your printer, your community, and your vision — not the other way around.
Supported printers
Official integrations
Prusa Core One
Available now
Sold by Prusa Research. Up to 8 tools. Plug and play.
Prusa Core One L
Coming later
First-party Prusa integration — timeline TBD.
Community integrations
RatRig V-Core
Community
Config contributions welcome
Custom CoreXY
Community
Any CoreXY with open firmware
Minimum requirements for Dev Kit
Full compatibility list and printer configs on github.com/BondtechAB/INDX →
Prime. Don't Purge.
Most multi-material systems share a single hotend, so every color change purges the old material into a wipe tower. It's filament you print only to discard. INDX doesn't share a melt zone. Each material has its own dedicated tool with its own thermal zone and filament path, so there's nothing to flush. INDX still uses a prime tower, but it only re-primes each tool's flow — priming, not purging.
✓ Near zero purge waste
Each tool holds its own material at temperature, ready to go.
✓ Zero cross-contamination
Dedicated thermal zones keep materials completely isolated.
How It Works
No wiring. No complexity.
— Induction heating powers the nozzle
— Infrared sensing monitors temperature
— No wiring in passive tools
— Thin tools, low cost, zero complexity
Every material in its own world.
— Each material in a dedicated tool
— Own thermal zone and filament path
— Zero cross-contamination
— Minimal material waste
Fast enough to not matter.
— Nozzle heat-up: 4–12 seconds
— Complete tool change incl. heat-up: ~14s
— System ready when you are
Any material. No tuning.
— Auto-adjusts to filament properties
— Fully mechanical solution — no sensors required
— Soft TPU to rigid composites
— No manual tuning needed
Your printer. Your setup.
— Klipper, Kalico, RepRapFirmware
— Simple tool-changing routines
— Configuration examples on GitHub
— No vendor lock-in
Start small. Grow freely.
— Start where you need
— Grow when you're ready
— Begin with any number of tools, expand freely
— Modular design for flexibility
Community Builds
Real printers. Real makers. Real builds. These are the machines running INDX in the community.
Voron Trident · 6 Tools
Steve
Steve is the designer of the Voron Trident. Here, his own integration of INDX is being shown on his Trident R2 250. It sports state-of-the-art PTFE routing and spool management for the 6 tools.
Sovol SVO8 (OG & MAX) · 8 tools+
3DPrintDemon
3DPrintDemon – The person behind Demon Macros (DKEU) for Klipper is the designer of the official INDX integration on the SV08 family of printers.
Voron v2.4 · 6 Tools
Hartk
Hartk designed a custom reverse gantry that mounts all tools on the rear, keeping the front open and clear for unobstructed access to the build plate.
Want to be featured? Share your build in our Discord community.
Where to Buy
INDX is available in two configurations. Choose the one that fits your setup.
● Available at bondtech.se
For builders, tinkerers, and anyone who wants full control of their tool-changing setup. Start with one Smart Toolhead and as many tools as your build requires.
Includes
✓1 Smart Toolhead ✓Tools to your choice ✓Part cooling to your choice ✓Generic printer documentation
Shipping starts late August/September.
Sold and supported by Bondtech.
Available at prusa3d.com
A conversion kit designed for the Prusa Core One. 4-tool and 8-tool configurations. Your existing print sheets, filament, and PrusaSlicer profiles carry over unchanged.
✓Smart Toolhead · 4 or 8 tools · Filament management
✓Tool holders, toolbar, runout sensor · Full installation manual
✓Chamber ventilation retained — doors stay closed
Bondtech product.
Sold and supported by Prusa Research.
TCT Award Winner
Boston, April 2026.
We're incredibly proud to win the award. A big thank you to everyone who continues to support and believe in what we do. This one belongs to the community that believed in INDX before it shipped.
From Our Beta Testers
They volunteered to test alpha units, work through the rough edges, and clear the path for everyone who comes after them.
I am impressed with the simplistic design and overall versatility of the INDX kit.
Beta Tester 01
United States
Been testing for a few weeks, the simplicity and robustness of the design has blown me away. Both in terms of the hardware and the software side.
But truly, the whole nozzle swap mechanism is so elegant to me, and the fact that it's all vanilla macros is just amazing.
I really hate abstracting tool changing/multi material behind a plugin.
Beta Tester 02
Australia
Bondtech's approach to multimaterial printing is clever and innovative. INDX is easier to build, setup, and operate than the systems that have come before it.
Print quality and speed are both good.
Beta Tester 03
United States
Technical Specifications
| Maximum Nozzle Temperature | 300°C |
| Maximum Operating Temperature | 60°C Ambient environment. |
| Max Flow Rate | 40mm³/s Measured @ 220°C with 25°C ambient. Lower rates achievable depending on nozzle size. |
| Nozzle Sensor Type | Loadcell Bi-directional sensitivity. *Shown with PINDA during Formnext 2025. |
| Heater Type | Induction Coil |
| Temperature Sensor Type | Wireless & Contactless |
| Extruder Chassis Material | Aluminium |
| Cowling Material | SLS Printed PA12 GF |
| Minimum Tool CC Distance | 35mm Chosen part cooling solution may have an impact. |
| Toolhead Weight | 345g Includes one tool. |
| Nozzle Properties | Steel with CHT |
| Nozzle Standard | Proprietary INDX Nozzle, steel and CHT |
| Nozzle Sizes | 0.25 ; 0.4 ; 0.5 ; 0.6 ; 0.8 ; 1.0+ |
| Filament Pre-tension System | Self-adjusting Uses DDD (Dynamic Dual Drive). |
| Extrusion System | Direct Drive |
| Filament Diameter | 1.75mm |
| Tool Change System | Mechanical, Maxwell coupling |
| Tool Change Time (Swap) | ~14s Highly dependant on temperature, priming, travel, etc. |
FAQ
Bondtech INDX is an automatic tool-changing system for FDM/FFF 3D printers that uses wireless rapid induction heating and contactless infrared temperature sensing to enable thin, passive tools with no electrical or data connections. This architecture allows rapid filament swaps and contamination-free multi-material, multi-nozzle, and multi-color printing.
In multi-material and multi-color printing, INDX solves the high marginal investment required for each additional tool, long printing times, and hardware, material, and energy waste associated with traditional approaches. The result: more materials, less waste, and no wipe towers.
INDX is for anyone who wants to make 3D prints with several materials, colors, and/or nozzle diameters in the same print or print job. You can also prepare and park tools to quickly pick up and use on later prints.
The INDX Development Kit is available now at bondtech.se — Smart Toolhead at $390, tools at $40 each. The INDX for Core One (also known as the INDX Conversion Kit for CORE One/+) is available exclusively at prusa3d.com, sold and supported by Prusa Research.
You need a compatible FDM/FFF 3D printer running Klipper, Kalico, or RepRapFirmware, along with a suitable build volume and a mounting solution for the Smart Toolhead. Generic tool holder CAD files and purchasable accessories are available. Configuration examples are provided on GitHub. INDX is designed for builders — familiarity with your printer's firmware and mechanical setup is recommended.
Yes. Both the INDX Smart Toolhead ($390) and INDX Passive Tools ($40 each) are available to purchase individually at bondtech.se.
INDX supports Klipper, Kalico, and RepRapFirmware (RRF). Configuration examples are available on GitHub. Simple routines mean low complexity to get started — no vendor lock-in, no proprietary plugins required.
Yes. INDX is protected by patents on the specific, novel technologies at its core, without targeting existing tool-changing features or limiting others from creating tool changers. Commercial use of INDX's IP-protected aspects requires proper licensing.
DX stands for Dynamic eXtruder. INDX uses Dynamic Dual Drive technology that self-adjusts to the optimal pre-tension required to print any material, at any requested volumetric flow, and under any 3D printing conditions — from soft TPU to rigid composites, with no manual tuning. Click here to know more
Stay Connected
INDX is a community-built product. Join the conversation, share your builds, and help shape what comes next. Pick your channel — or join them all.
Newsletter
Be the first to know and get detailed updates, technical deep-dives, directly in your inbox.
Discord
Join real-time discussions with other makers, beta testers, and the Bondtech team.
YouTube
Build guides, tech deep-dives, community showcases, and the full INDX reveal video. Subscribe for the latest drops.
Follow for visual updates, behind-the-scenes content, and community showcases.
Facebook Group
Connect with the INDX community, share your builds, and get support from fellow makers.
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Real-time updates, announcements, and direct engagement with makers and the Bondtech team.
Can't decide? Join all channels. Each platform offers unique content and community interaction.
Ready to Build?
Start with one Smart Toolhead. Expand to as many tools as your build demands.
What's Included
