In stockPrusa Research · authorised UK reseller
INDX 4-Tool Conversion Kit for CORE One+ (Gen2)
1 / 11£679inc. VAT
SKU PRUSA-3944-0
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INDX 4-Tool Conversion Kit for CORE One+ (Gen2) · Product information from Prusa Research.
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Bondtech INDX
Eight nozzles. Zero waste. True multi-material.
The INDX replaces your single nozzle with up to eight independent toolheads. Each has its own nozzle and filament. No purging, no waste towers, no material limitations. Combine rigid and flexible, swap nozzle sizes mid-print, use soluble supports that actually work. Designed by Bondtech, sold and supported by Prusa. Fits your existing CORE One+.
CONVERSION KIT
You already own half of it
If you already have a CORE One+ 3D printer, the INDX is a conversion kit, not a new machine. Install the Smart Head, mount the tool docks, load your filaments. Your existing print sheets, filament collection, PrusaSlicer profiles, and Prusa Connect setup carry over unchanged. Same printer, dramatically more capability.
Three Major Benefits for Better 3D Printing
No Wipe Towers / Purge Blocks
Nearly all multi-material systems place a block in the corner of your print sheet where the nozzle purges excess filament. The INDX doesn't do that. You can use up to 248×205×270 mm for your prints!
Doors Closed, at All Times
Many enclosed printers require you to keep the chamber door open when printing PLA or PETG, eliminating the benefits of the closed chamber. The INDX retains the unique ventilation system, so you can keep the doors closed.
Use Any Filament You Want
The INDX is not limited by storage options or proprietary RFID chips. You are completely free to use any spool you like, including all the materials you already know and love.
Stop Wasting Filament!
Cheaper solutions get expensive really quick
![[imageAlt]](/_next/image?url=https%3A%2F%2Fpub-71dfa593f1244e33acff22ad03e73911.r2.dev%2Fproducts%2F53dfc942-327f-4fe0-b82c-cafae655e90d%2F93476d20-4224-41e2-b2c3-eb8ea42b7cbb.jpg&w=3840&q=75)
INDX Does Not Create Excessive Waste
This is how multi-material should be done.
Nearly every multi-material solution on the market produces excessive plastic waste during filament changes. A cheaper machine might save you money on day one, but you'll pay the difference in wasted filament by month six. When INDX swaps materials, it purges around 13 milligrams of plastic (0.013g) to stabilize the pressure inside the nozzle. That means no huge purge structures, no large piles of filament “poop,” and absolute minimum wasted material across long and complex prints. The INDX produces 5× less waste than the most efficient systems and 30× less than standard filament rewinding systems.
![[imageAlt]](/_next/image?url=https%3A%2F%2Fpub-71dfa593f1244e33acff22ad03e73911.r2.dev%2Fproducts%2F53dfc942-327f-4fe0-b82c-cafae655e90d%2Fcae34e13-c8aa-4ca8-aab8-2b5086b46de5.jpg&w=3840&q=75)
new level of reliability
Advanced Nozzle Wiper
Zero attention required even during long print jobs
The advanced nozzle wiper for induction nozzles helps remove any residue left on the nozzle before printing resumes, improving cleanliness during swaps and reducing the risk of stray blobs affecting print quality. The nozzle wiper is located on a purge collector, where the nozzle deposits the micro-blob of plastic, smaller than a grain of rice.
This is all the waste INDX generates during filament change!
The Innovations that Drive the INDX
Only one active component - less complexity, lower price, easier to use.
Smart Active Head
Fast Induction Heating
The INDX Smart Head contains an induction coil - just like an induction cooktop. When it picks up a toolhead, it generates a high-frequency magnetic field that heats the nozzle from cold to printing temperature in seconds. When the tool is parked, it cools rapidly. No oozing, no stringing from idle nozzles.
HIGH-FLOW NOZZLES
Passive Toolheads
Using passive tools without any electronics is a massive advantage: they are less complex and more reliable. Adding a fifth, sixth, or eighth tool means adding a nozzle and a parking dock - not another full print head. By default, the INDX comes with high-flow 0.4 mm nozzles.
The Dynamic Extruder
Self-adjusting grip for different materials
Soft materials need a gentler grip than rigid, fiber-filled ones. The INDX features a unique mechanism that adjusts the drive gear tension automatically, so you can move from TPU to rigid engineering filaments without stopping to retune the extruder.
8 materials conveniently loaded
Always Ready to Print
Load eight filaments, install different nozzle sizes from 0.25 to 0.8. When you start a print, everything's already ready and loaded. Just pick the right tool. If you like to use different filaments and nozzles, and hate constantly swapping everything around, the INDX is the solution for you.
Effortless Start
Start Printing in No Time
Once you install the INDX, the printer will perform a quick calibration, so it can pick up and park all eight tools with absolute precision.
Any model can be colorful
It's Easy with EasyPrint and PrusaSlicer
EasyPrint and PrusaSlicer are two free tools you can use to prepare any 3D model for printing. Both feature easy-to-use tools for virtual painting, so you can turn any model you download into a beautiful, color-rich 3D print. EasyPrint works in your browser or on your phone/tablet and PrusaSlicer is a fully featured software package for Windows, Mac and Linux.
Highly precise physical sensor, no guesswork
Always Perfect First Layer
Even with multiple nozzles, the INDX achieves a beautiful first layer without lengthy calibration thanks to the LoadCell sensor. Simply hit Print and let the machine do the rest!
Keep your filaments dry
Works Perfectly with Prusa USS Drybox
INDX spoolholders are fully compatible with the Prusa USS Drybox and you can attach all eight of them. This way, you can keep your advanced, hygroscopic materials neatly stored and dry - and have them always ready for a new print job.
One nozzle is a limit
Why single-nozzle multi-material has a ceiling
Shared Melt Zone
Every single-nozzle multi-material system has the same fundamental problem: one melt zone for multiple materials. Every color change means unloading the old filament, loading the new one, and purging everything in between.
Expensive Waste
On complex prints, the waste usually weighs more than the finished object. That's a physical limitation baked into the architecture, not a design choice. You can optimize it, but you can't eliminate it. Even with cheap filaments, you are effectively throwing away your money.
Trouble with Mixing Materials
You can't combine materials that create an incompatible environment in the nozzle. Try running TPU through the same hotend as PLA and watch the jams pile up. Different nozzle sizes in one print? Impossible with only one nozzle.
INDX Toolchanger
- Each tool has its own nozzle, no need to purge
- Virtually zero waste, no wipe towers or filament "poop"
- No cross-contamination between materials
- TPU, PVA, Carbon Fiber and PETG in one print
- Works with any filament brand, any spool size
Single-Nozzle Systems
- Single nozzle must purge old material before loading new
- Purge tower can weigh more than the finished print, large filament "poops" require frequent management
- Residual material causes color bleeding and contamination
- TPU jams in shared hotends
- Space limitations, some systems lack profiles for filaments without proprietary RFID chips
What's in the Box
The INDX is available as a conversion kit - that means you need to start with a CORE One+ 3D printer. Then, follow our detailed and illustrated assembly guide that will walk you through the entire installation process, step-by-step. Everything's in the box Both include everything needed to install INDX on your CORE One+, with a few differences based on the printer generation.
| Feature | Prusa CORE One+ | Prusa CORE One+ (Gen 2) |
|---|---|---|
| INDX Head | Included | Included |
| INDX Tools | 4× or 8×, depending on selected version | 4× or 8×, depending on selected version |
| Plastic Parts | Included | Included |
| Top Cover | Included | Included |
| Spoolholders | 4× or 8×, depending on selected version | 4× or 8×, depending on selected version |
| Fasteners & Other Accessories | Included | Included |
| Nozzle Cleaning System | Advanced nozzle wiper made for induction-heated nozzles | Advanced nozzle wiper made for induction-heated nozzles |
| GT 1.5 belts and matching pulleys | Included - smoother surfaces | Not included - already present on the printer |
| Thermal Expansion Joints | Included - faster print starts | Not included - already installed on the printer |
What's in the Box
Choose the INDX Conversion Kit version that matches your printer. Both include everything needed to install INDX on your CORE One+, with a few differences based on the printer generation.
| Feature | Prusa CORE One+ | Prusa CORE One+ (Gen 2) |
|---|---|---|
| INDX Head | Included | Included |
| INDX Tools | 4× or 8×, depending on selected version | 4× or 8×, depending on selected version |
| Plastic Parts | Included | Included |
| Top Cover | Included | Included |
| Spoolholders | 4× or 8×, depending on selected version | 4× or 8×, depending on selected version |
| Fasteners & Other Accessories | Included | Included |
| Nozzle Cleaning System | Advanced nozzle wiper made for induction-heated nozzles | Advanced nozzle wiper made for induction-heated nozzles |
| GT 1.5 belts and matching pulleys | Included - smoother surfaces | Not included - already present on the printer |
| Thermal Expansion Joints | Included - faster print starts | Not included - already installed on the printer |
Questions & Answers
Does the INDX work with my existing CORE One (without the plus upgrade)?
Yes, you will end up with CORE One+ with INDX. The INDX was co-developed with Prusa specifically for the CORE One architecture. It is not compatible with MK4S, MK3S+, or other printers.
Should I get the 4-tool or 8-tool kit?
Start with the 4-tool kit if you want to try multi-material without committing to the full 8. You can add individual passive tools later. The 8-tool kit gives the best per-tool value and you can print truly complex objects right from the start.
How much build volume do I lose?
About 15 mm in the Y-axis and 2mm in X-axis due to the docking station and purge collector additions. On the CORE One+ (250 × 220 × 270 mm base volume), the total build volume with the INDX mounted is 248×205×270 mm.
Does it work with third-party filament?
Yes. the INDX can be used with 1.75 mm filament from any manufacturer. No RFID, no proprietary spools, no vendor lock-in. Use Prusament, third-party brands, or whatever you have on the shelf.
How does this compare to the Prusa XL toolchanger?
The XL is our large-format toolchanger with a 360 x 360 x 360 mm build volume. If you need big parts, fast swaps, or upcoming specialty toolheads (silicone printing, pick-and-place for embedded inserts), the XL is the right machine. The INDX on a CORE One+ gives you a smaller footprint (248 x 205 x 270 mm effective), more tools (8 vs 5), an enclosed chamber with elevated temperature (55°C), and a significantly lower total price. Think of it this way: the XL is for people who need the build volume and a full-scale active toolchanger. The INDX is for people who want the most material flexibility in a compact, enclosed format. Both are toolchangers with negligible purge waste. They just serve different use cases.
Does the INDX work with CORE One L?
The dedicated kit for the CORE One L is coming at a later point. The CORE One+ version is not compatible with the L.
Is there a fully-assembled pre-installed version?
We will offer at a later time - a 3D printer with the INDX already installed.
How does the nozzle calibration work?
We initially used the automatic nozzle calibration system from the Prusa XL. It relies on a metal pin mounted in the middle of the print bed which each nozzle taps from various sides.Newly, the INDX conversion kit includes a brand new toolhead offset calibration system, which is permanently mounted outside the print area. And if you are wondering why there are two targets, one is always reading the background noise to get extremely precise readings from the main sensor in any environment. The result is an easier and faster setup with improved repeatability.
What are the CORE One dimensions with INDX installed?
With doors closed and spools attached, Width 620 mm, Height 690 mm, Depth 470 mm.
INDX at a Glance
A toolchanger that turns your CORE One+ into an 8-material machine. One Smart Head drives up to eight lightweight passive tools, each with its own nozzle, its own filament, and no shared melt zone.
Independent toolheads
Up to 8
Print one object with up to eight colors, materials, or nozzle sizes.
Purge waste per swap
Just 13 miligrams
Instead of wipe towers or huge piles of filament flushed to the side.
Tool swap time
~12 to 16 sec
Including induction heating from cold
Max nozzle temperature
300 °C
Contactless induction, no wires on passive tools
INDX vs Snapmaker U1 vs Bambu Lab X2D
The INDX costs more but doubles the tool count, adds an enclosed chamber that goes up to 55 °C, and works with the Prusa ecosystem you may already own. Looking for a larger build volume? See our Prusa XL (360 x 360 x 360 mm, 5 tools).
| Feature | CORE One+ with INDX | Snapmaker U1 | Bambu Lab X2D |
|---|---|---|---|
| What it is | 8-tool passive toolchanger (upgrade kit) | 4-tool toolchanger (standalone printer) | Dual nozzle on shared carriage (standalone printer) |
| Max materials per print | 8 | 4 | 2 nozzles (up to 16 with AMS, but AMS uses purge) |
| Purge waste | Zero | Small prime tower (minimal) | None for 2 materials; full purge tower with AMS for 3+ |
| Tool swap time | ~12 to 16 sec (incl. induction heating) | ~5 sec (nozzles stay hot) | ~2 sec (mechanical lift, both nozzles on carriage) |
| Mix nozzle sizes in one print | Yes (0.2 to 1.0 mm) | No (all 0.4 mm stainless) | No |
| Heating method | Contactless induction. Nozzle heats in seconds, no wires on tools | Conventional heater cartridge per toolhead | Conventional heater cartridge per nozzle |
| Auto-adjusting filament grip | Yes. Dynamic Dual Drive adapts tension per material automatically | No. Fixed drive tension | No. Fixed drive tension |
| Enclosed chamber | Yes. CORE One+ chamber, 55 °C | No enclosure standard (optional add-on, extra cost) | Yes. 65 °C active heating |
| Engineering materials (PC, PA, ASA) | Yes. Enclosed chamber keeps temps stable | Risky without enclosure: warping, fumes | Yes. Enclosed chamber |
| Open-source firmware | Yes. GitHub, no locked bootloader | Klipper-based (partially open) | No. Proprietary, cloud-connected |
| Filament lock-in | None. Any 1.75 mm filament | RFID auto-detect (third-party works, manual config) | RFID (third-party works, manual config) |
What INDX unlocks on CORE One+
The enclosed, actively heated chamber of CORE One+ already prints the full material range. INDX adds the ability to mix them in a single job - without a purge tower, and without swapping spools mid-print.
Every nozzle
PLA
Eight PLA spools at once means eight-color models without a purge block. Every CHT nozzle is high-flow, so color swaps stay fast even on detailed prints.
- Nozzle
- 210–220 °C
- Bed
- 50–60 °C
Functional
PETG
Functional parts with color-coded or material-coded sections. Assemblies that would normally need post-bonding print as a single job.
- Nozzle
- 230–250 °C
- Bed
- 70–90 °C
Flexibles
TPU
TPU grips molded directly into rigid parts. The Dynamic eXtruder relaxes its grip automatically - no manual tension adjustment between materials.
- Nozzle
- 220–240 °C
- Bed
- 50–60 °C
Abrasives
PA-CF / PC-CF
Every INDX nozzle is hardened steel as standard. Carbon-fiber and glass-fiber reinforced filaments print without grinding the nozzle through in a weekend.
- Nozzle
- 270–290 °C
- Bed
- 90–110 °C
PVA
Soluble Supports
A dedicated tool for water- or limonene-soluble supports means overhangs and internal geometry that no single-nozzle machine can clean up. Dissolve and done.
- Nozzle
- 210–230 °C
- Bed
- 60–70 °C
Enclosed chamber
ASA / ABS
The CORE One+ chamber already handles warp-prone styrenics. With INDX, mix ASA shells with ABS internals - or vice versa - for outdoor assemblies that hold up in the sun.
- Nozzle
- 240–265 °C
- Bed
- 100–110 °C
What can you achieve with 8 nozzles?
Multi-material goes beyond color. It lets you build functional parts that combine properties no single filament can deliver.
Professional prototyping
Multi-color without the usual mess
This is where the INDX makes the biggest difference for most people: multi-color printing with almost no wasted filament and far less time lost to purging. Your filament goes into the model, not into a purge tower.
Complex geometry unlocked
Supports that are easier to remove
Print the main part in one material and the supports in another that separate more easily. That means cleaner overhangs and less post-processing.
The #1 request from the community
Rigid + Flexible in One Print
Print a hard housing with a soft seal, grip, bumper, or hinge in the same job. The INDX keeps each material in its own nozzle. No jams, no shared hotend fighting soft vs. rigid filament.
Speed meets detail
Mix Nozzle Sizes Mid-Print
Keep a variety of nozzle sizes loaded in and ready instead of stopping to swap them by hand. Use 0.25 mm for miniatures, 0.6 or 0.8 mm for brackets and shop parts, and keep a few 0.4 mm nozzles as your everyday printing. You can even mix them in one print.
The details that matter
Technical specifications
Manufacturer figures, with plain-English notes where useful.
14 specifications
Printing
- Diameter
- 1.75 mm
- Max tools
- 8 on CORE One/+
- Nozzle type
- High-flow (CHT), nitrocarburized steel
- System type
- Passive toolchanger with induction-heated nozzles
- Tool coupling
- Mechanical Maxwell coupling
- Heating system
- Contactless induction coil (on Smart Head)
- Extrusion system
- Dynamic Dual Drive (DX) auto-adjusting grip
- Compatible printer
- Prusa CORE One/+
- Build volume impact
- 2mm reduction in X-axis, 15 mm reduction in Y-axis
- Compatible nozzle sizes
- 0.25, 0.4, 0.5, 0.6, 0.8, 1.0 mm
- Build volume with indx installed
- 248×205×270mm (X×Y×Z)
Materials & environment
- Supported materials
- PLA, PETG, ASA, ABS, PC, PA, TPU, PVA, BVOH, and other non-abrasive materials - up to 300°C
- Temperature sensing
- Wireless and contactless
- Max nozzle temperature
- 300 °C
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