Original Prusa i3 MK3S kit

The Original Prusa I3 MK3S is the successor of the award-winning Original Prusa i3 MK2 3D printer. With the rebuilt extruder, a plethora of sensors and the new magnetic MK52 heatbed with replaceable PEI spring steel print sheet we believe that we've developed our best 3D printer yet!  

This listing is a DIY KIT for self-assembly. We also offer a fully built and tested 3D printer.

Warning for US customers: If you select the combination with both steel sheets, your order will exceed $800 (with shipping) and you may be charged with customs duties. More info.

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IN STOCK! 3 days for preparation, 3-6 days for combined orders



$749.00

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After more than a year of a continuous development of the Original Prusa i3 MK3 we are introducing MK3S - the enhanced and improved revision of the MK3.

WITH THE ORIGINAL PRUSA i3 MK3S WE ARE INTRODUCING:

NEW FILAMENT SENSOR

The previous sensor didn’t work well with some specific filaments. The new sensor is using the optical sensor which is triggered by a simple mechanical lever. This sensor doesn’t care about the optical properties of the filament and cannot die because of mechanical wear.

BETTER SERVICE & PRINTS

Thanks to completely reworked extruder changing the nozzle or PTFE tube is easier than ever before. As a bonus, the nozzle and the extruder motor is much closer to the X axis, this means less resonance and better prints too. MK3S is also better for printing from flexible materials.

DOZENS OF TWEAKS

MK3S includes all the cumulative upgrades from the entire life cycle of the MK3 like genuine Gates belts, textile sleeves, a new Einsy case for easier Raspberry Pi connection, an anti-rust coating on smooth PEI sheets and, of course, dozens of firmware and plastic parts enhancements.


The Original Prusa i3 MK3/S is the "Best 3D printer" according to All3DP.com and MAKE: Magazine, where MK3/S also received "Editor's Choice" as the highest-rated 3D printer in 2019 Digital Fabrication Guide. The MK3S features a rebuilt extruder, numerous sensors, and various smart features. Plus, a new magnetic MK52 heatbed with replaceable PEI spring steel print sheet. Dozens of various tweaks and upgrades improve the reliability and ease of use. MK3S‘s functionality can be further expended with the unique Multi-Material Upgrade 2S addon for printing with up to 5 materials simultaneously.


WHAT WE ARE PROUD OF...

The most significant features of Original Prusa i3 MK3S

REMOVABLE HEATBED

The new MK52 Magnetic HeatBed holds a replaceable alloy spring steel sheet with a PEI surface. You can choose between two types of sheets - smooth PEI sheet (default option, already available) and textured powder coated PEI (this will be available later). 

FRAME STABILITY

With the MK3S we are introducing the reworked Y axis from aluminum extrusion. It provides the same rigidity as some other printers while providing the sleek look of our milled Dural frame. The frame is also optimized to add 10 mm of Z height totaling at 210 mm.

SILENT & FASTER PRINTING

Thanks to the new Trinamic2130 drivers and Noctua fan, the MK3S is extremely quiet in the stealth mode. But the MK3S is quieter than 99 % of the available printers, even in the Normal mode. In normal mode, we have also increased the printing speed. Now you can achieve more than 200 mm/s!

POWER PANIC

Have you ever tripped over the extension cord and lost a 20-hours print? MK3S will save you! The printer can fully recover from the loss of power. It detects power interruption and shuts down the heatbed and extruder heating. After restoring the power, you can continue with printing.

FILAMENT SENSOR

With MK3S we are introducing a completely reworked extruder with a new filament sensor. The new sensor is using the optical sensor which is triggered by a simple mechanical lever. This sensor doesn’t care about the optical properties of the filament (it can be completely invisible) and cannot die because of mechanical wear.

PREVENTS SHIFTED LAYERS

The new EINSY RAMBo motherboard with Trinamic drivers not only makes the MK3S silent but it also can detect skipped steps and layer shifting. This is a big step forward in the reliability of the printer and the user comfort. You can say goodbye to ugly prints!

BONDTECH EXTRUDER

The extruder has now upgraded with Bondtech drive gear. It grips the filament from both sides, increasing the push force and making the printer more reliable. This is useful especially for flexible filaments. Also, the print fan now cools part from two sides, increasing the overall performance.

P.I.N.D.A. 2 PROBE

MK3S has two new thermistors. The first one measures ambient temperature on the electronics, preventing MINTEMP errors in rooms with 15°C or less. The second one is embedded in the new P.I.N.D.A. 2 probe to compensate for temperature drift. So the first layer will always be spot on!

E3D V6 NOZZLE

E3D V6 is market-leading all metal hotend well known for its high-temperature performance. The MK3S utilizes a custom heatbreak developed together with E3D. The reliability has proved in our Multi Material upgrade and continues to deliver great performance in surprisingly small form factor.

Read more about features of our brand new Original Prusa i3 MK3S in the article at PrusaPrinters.org


Check out the official announcement video!


THE INTERNET ABOUT MK3/S

"MK3 - highly recommended. I'm really looking forward to everything this printer does becoming standard everywhere." - more infoThomas Sanladerer
"In short. What I don't like about this printer? The rubber feet. What I like? Absolutely everything else!" - more info 3D Maker Noob
"With it's combination of useful new features, along with the reliability and quality of the prints, this is a 3D printer that, especially in the kit form, offers a great price-performance ratio." - more info GreatScott!
"Using this 3D printer has been a joy and an education. (...) The Original Prusa i3 MK3 is highly, thoroughly, and unreservedly recommended." - more info ALL3DP.com

SEE THE MK3/S IN ACTION!

MK3 interview with Josef by Thomas Sanladerer

MK3 interview with Josef by 3D printing nerd

Josef's improvised presentation of MK3 features

EINSY RAMBO interview with Josef


FULL FEATURES LIST (MAY 2019 EDITION)

NEW FEATURES

  • Removable magnetic spring steel sheet with PEI surface (*)
  • Brand new EINSY RAMBo motherboard
  • Silent Trinamic drivers with 256 microstepping
  • Faster printing: 200+ mm/s
  • Sensorless homing for X and Y axes
  • Detection and recovery of shifted layers
  • Improved frame rigidity with aluminium extrusions
  • Power loss detection and recovery
  • Better cooling from both sides of the object
  • Optional WIFI with Octoprint interface included
  • Bondtech extruder drive - filament is driven from both sides
  • IR filament sensor
  • Automatic loading of filament when filament is inserted
  • Both extruder cooling fan and print cooling fan detect RPM. When extruder fan is blocked, the printer will stop to prevent damage of extruder. Same applies for the print cooling fan.
  • Extra silent Noctua fan
  • New P.I.N.D.A. 2 probe with included thermistor - faster temperature calibration
  • Room ambient temperature sensor

* Consumable parts, such as PEI sheets (smooth, textured, etc.) are not covered by warranty as the coatings are designed to diminish over time unless failure has occurred due to a defect in materials or workmanship. Cosmetic damage, including but not limited to scratches, dents, cracks or other cosmetic damage is also not covered by the warranty. Only defective sheets on arrival are covered by warranty.

BASIC FEATURES

  • Great build volume11,025 cm3 (25 x 21 x 21 cm or 9,84 x 8,3 x 8,3 in)
  • Integrated LCD and SD card controller (8GB included)
  • 0.4mm nozzle (easily changeable) for 1.75 mm filament
  • Layer height from 0.05 mm
  • Automatic mesh bed levelling
  • Heatbed with cold corners compensation – for warpless 3D printing from any material
  • Automatic skew axes compensation
  • Hassle free PEI print surface - no glass, no glue, no ABS juice
  • Supported materials – PLA, ABS, PET, HIPS, Flex PP, Ninjaflex, Laywood, Laybrick, Nylon, Bamboofill, Bronzefill, ASA, T-Glase, Carbon-fibers enhanced filaments, Polycarbonates...
  • Easy multicolor printing based on layer height
  • 1 kg (2 lbs) silver PLA filament included
  • Kit box dimensions: 11 kg, 42×43×24 cm; 16.5×16.9×9.5 in (D×H×W)
  • Printer dimensions (without spool): 7 kg, 55×40×50 cm; 21.6x15.7x19.6 in (D×H×W)
  • Power consumption: PLA settings: 80W / ABS settings: 120W

WHY DO YOU WANT ORIGINAL PRUSA I3 MK3S?

Great support

We are an established company founded in 2012, and we work hard to help you start 3D printing as soon as possible. We are providing full 24/7 customer support with live chat and e-mail in several languages. There are also unofficial user groups on Facebook, where makers help each other. You will never be alone in the big world of 3D printing!

The MK3S comes along with a forum support where our ever-growing community can always help, or you can even get in touch with Jo Prusa himself at the very same spot! Check out the forum and regularly updated Knowledge Base!

With 3D printing, buying a printer is just a beginning!


Fun to assemble

Assembling the kit is an excellent first step to the world of 3D printing. You will understand the principles of printer construction and get a huge advantage when you need to solve possible problems and replacements later.

But don't worry. Assembling is quite easy! You don't have to solder at all to build our kit. You don't even have to own a soldering iron. All our cables are cut to length and with professionally crimped connectors. And from the electronics standpoint, the hardest thing will be plugging the connectors to the motherboard.

All of this makes the kit very friendly to younger builders :-)


Best assembly instructions and free 3D Printing handbook

We didn't want to leave anything to chance, so our assembly instructions are pictured to the smallest detail.

See the assembly manual for yourself!

All fasteners and mechanical parts have 1:1 drawing so you can easily find them, and there is no chance of you picking a wrong one. You don't have to be MIT graduate to assemble our kit ;-)

Our fastest customer built the kit in 4 hours! Will you beat him?


Ready to print settings

We provide high print settings with the printer, so you don't have to dive into complex new programs the second you finish the build. You can start printing right away, and this gives you a great head start!

These settings are great for all kinds of objects, not just for a couple of prepared showpieces. After a while, when you're familiar with the printer, you can, of course, dive into tinkering ;-)

We are developing our own slicing software. PrusaSlicer is a feature-rich, frequently updated tool that contains everything you need to export the perfect print files for your Original Prusa 3D printer. But of course, we also have the settings for the third party slicers like Simplify3D, Cura, etc.


Upgradability

One of the most popular features of Original Prusa i3 concept is upgradability. If you buy our 3D printer, you can upgrade it later to the new version, so you don't need to buy the whole new model every two years as you get used to for example with your phone or laptop. :-)

Upgrades are a great way not only for saving money, but also to learn about the construction of the printer's hardware. We are constantly improving our technology. A few years ago there was the Original Prusa i3 3mm which was upgradable to the Original Prusa i3 Plus 1.75mm (MK1). MK1 printer can become MK2S thanks to the next big upgrade and then you can go even for the latest MK3S (or MK2.5S if you wish).


Ready for the Multi Material Upgrade 2S

Original Prusa i3 MK3S Multi Material 2S is the unique consumer option to print with up to 5 different materials simultaneously. MMU2S comes with a redesigned body and a new filament loading mechanism. Instead of the previous Bowden system. The motorized selector head has a F.I.N.D.A filament sensor and a built-in blade, which prevents filament jamming.

Multi-material could be your next step in the 3D printing world and MK3S is completely ready for the upgrade.

BTW: Do you know, that you can easily print soluble interface supports with Multi Material upgrade? We have a pretty smart solution for you - check out the video!


Quality guaranteed by Josef Prusa & Prusa Research

Prusa Research is a 3D printing company based in Prague, Czech Republic. It was founded by Josef Prusa, one of the core developers of the Open Source project RepRap, in 2012 as a one-man startup and grows to a 160+ team now.

The open-sourced Prusa i3 design is according to 3DHubs the most used 3D printer in the world.

Today we are shipping more than 6000 Original Prusa i3 printers per month to over 120 countries directly from Prague.


Original Prusa i3 MK3S Original Prusa i3 MK2S Original Prusa i3 MK3S Multi Material Upgrade 2S

Build volume

25 x 21 x 21 cm | 9.84 x 8.3 x 8.3 in25 x 21 x 20 cm | 9.84 x 8.3 x 825 x 21 x 21 cm | 9.84 x 8.3 x 8.3 in

Layer height

0.05 – 0.35 mm0.05 – 0.35 mm0.15 – 0.35 mm

Speed

200+ mm/s100 mm/s200+ mm/s

Max hotend/heatbed temp.

300 °C / 120 °C (572 °F / 248 °F)300 °C / 120 °C (572 °F / 248 °F)300 °C / 120 °C (572 °F / 248 °F)

Print surface

removable magnetic heatbed /
PEI spring steel sheets

heated with cold corners compensation /
PEI hassle free

removable magnetic heatbed /
PEI spring steel sheets

Number of materials (simultaneously)

115

Supported materials

Any thermoplastic including Nylon and Polycarbonate

Any thermoplastic including Nylon and Polycarbonate

Any thermoplastic including soluble supports - PVA, BVOH...

Special features

Bondtech gears, Noctua fan,
extra silent Trinamic drivers

-

Direct drive extruder, filament cutter, reduced wipe tower - wipe into infill/object, manual controls, finishing filament scraps

Filament sensor

Yes (IR)

No

Yes (mechanical)

Power panic

Yes

No

Yes

Octoprint compatibility

Yes

Yes

Yes

Advanced sensors

4 thermistors, fans sensor,
shifted layers

2 thermistors

4 thermistors, fans sensor,
shifted layers

Calibration

automatic 9 points XYZ / skew axes compensation

automatic 9 points XYZ / skew axes compensation

automatic 9 points XYZ / skew axes compensation

Kit price

769€ VAT incl. or $749

619€ VAT incl. or $599

299 € VAT incl. or $299

Assembled printer price

999€ VAT incl. or $999

919€ VAT incl. or $899

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E-shop link

Data sheet

3D printersMK3 kit

Reviews

Grade 
05/13/2018

i3MK3 kit

This is my third printer but my first Prusa. I constructed it following the online manual simply because I could zoom in on any detail I wasn't sure about. The hardest part on the build was getting the frame level. It wasn't difficult it just took the longest time compared to every other part of the build. I was after a printer that could print with a whole range type of filaments, currently I'm loving the results from PETG.
I'll be looking at the multiple filament system in the near future to upgrade the MK3. would I purchase another Prusa? Sure would!

    Grade 
    05/03/2018

    My Original Prusa i3 MK3 kit after a while. Still the best in th

    Hi! I am the proud owner of one of the i3 MK3 kits for a couple of months now. After heavy use in this period i can tell you that i'm even more in love with the machine then i was before it arrived at my doorstep. I own a few 3d printers but the mk3 is by far the best one in the fleet. Some people complain that if you buy a Prusa you are not buying a good tested machine but they feel like they are part of a beta testing program. To be honest that's what i like so much about projects like this. The technology is fairly new and i love the fact that we as makers can help developing and things like that. After the build of the mk3 i had some issues with perfecting the bed settings but after that i did not encounter any problems anymore. There are a few great stl files that can help you calibrate the printer for the first and hopefully last time. I am trying to save money for the new and awesome mmu 2.0 also. I am a huge Prusa enthusiast and can't wait to see what Josef Prusa is coming up with next. I personally will support the Prusa community in any way i can.

      Grade 
      03/10/2018

      Astonishing

      Great print quality, speed, almost without noise. My previous experience with 3d printers was with a cheap chinese kit. Cannot compare, this is other world. Amazing

        Grade 
        03/01/2018

        The BEST

        Don't think if you are looking for a printer in this price range...Its is the best and suits absolute beginner too.

          Grade 
          02/25/2018

          Simple build with exceptional quality

          This was one of the best builds I have ever done. The kit came very organized with everything I needed to build. The instructions were very good. You should follow the online manual and read some of the comments. I was pleasantly surprised that I was up an running with beautiful prints after 5 hours. One of the first things I plan to print is spare parts for the printer. Very impressed with the quality and the prusa control software does a great job for quick prints where detailed configuration is not required. I am excited to get my multicolor upgrade soon.

            Grade 
            02/05/2018

            Marco Dias

            What an amazing printer.
            Arrived one week ago, took me about 8 hours to assemble my MK3 perfectly using the provided and the online manual.
            Being a lego lover and an electronics technitian, i could feel both passions at the same time while building from scratch.
            Soooooooooo much fun.
            Once calibrated, it has been working almost non-stop all week.
            Just finished printing my first 3d piece made of 40+ pieces. Againg, so much fun.
            Going to order MMU right now :p
            Thank you Josef Prusa.

              Grade 
              02/01/2018

              Amazing

              Super fun to assemble and very detailed instructions.Loved the suprise! best quality prints, no noise. The heatbed made my life easier, made by makers for makers.

                Grade 
                01/22/2018

                The logical next step

                I bought a i3 MK2 kit 1 year ago and was very pleased with the results.

                The MK3 has lots of meaningful improvements, I really enjoyed assembling it, it was a lot easier than the MK2.

                The first print calibration got a lot easier.
                The print quality is still the same or even better.

                But I can't stress enough how quiet it is, I own a Makergear M2 and the Power Supply Fan is actually louder than most of the sounds the Prusa MK3 produces.

                If someone is looking for a desktop printer to put next to his workplace, I doubt you will find a quieter machine.

                  Write a review

                  Original Prusa i3 MK3S kit

                  Original Prusa i3 MK3S kit

                  The Original Prusa I3 MK3S is the successor of the award-winning Original Prusa i3 MK2 3D printer. With the rebuilt extruder, a plethora of sensors and the new magnetic MK52 heatbed with replaceable PEI spring steel print sheet we believe that we've developed our best 3D printer yet!  

                  This listing is a DIY KIT for self-assembly. We also offer a fully built and tested 3D printer.

                  Warning for US customers: If you select the combination with both steel sheets, your order will exceed $800 (with shipping) and you may be charged with customs duties. More info.

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