Original Prusa i3 MK3S kit

New product

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! Clearing backlog of orders. 5-7 business days for preparation!



$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 (L×H×W)
  • Printer dimensions (without spool): 7 kg, 50×55×40 cm; 19.6×21.6×15.7 in (L×H×W)
  • Power consumption: PLA settings: 80W / ABS settings: 120W

WHY DO YOU WANT ORIGINAL PRUSA I3 KIT?

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 kit 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 
05/15/2019

Best Investment I've ever made

So 3D printing was something of a dream for me. I'm a scale modeler at heart and also a tabletop war gamer and mini painter. So wanting to make my parts, terrain and minis sounded great, but was deterred form the complexity of it all from the hardware, software and design aspects. My feelings were, "Oh Well, leave up to the experts who understand this stuff...
Well, thank you Prusa I've jumped in feet first on an excellent platform that can grow with me as my expertise and knowledge grows. Building the kit is a must as that's the best way to know your printer part by part and understand it's mechanical workings and takes the fear out of taking it back apart for maintenance or replacing a part or upgrading.

The features and built in calibration tools again make it so easy operate and the Slic3er PE software makes it easy for me to learn about the slicer as well as watching many YouTube videos by Prusa and 3D printing enthusiasts where they take you from their failures to solutions and then to completion of their product.

Thank you Prusa for an excellent Machine and a wonderful support team.

  • 6 out of 7 people found this review useful.
Grade 
05/07/2019

World class printer

Comming from a Anet A8 - acrylic I3 printer also as a kit. After more than a year printing I am hooked this amazing tech.
My choice for a new printer came on the Mk3s kit.
Not only was it fun to assembly, but the well written manual and the online portal made it very easy to put this beast of a machine together.
Its prints very very nice, and it still amazes me. The slicer software is very easy to use. Great for a start printer, but also for pro's. Why, because it works every time.
thumbs up.

  • 4 out of 5 people found this review useful.
Grade 
05/06/2019

BIG Fun to build. Prints perfect

It took me one Day to build the Kit. Very good Assembly Instructions. The printer makes from first switch on perfect prints!

  • 1 out of 2 people found this review useful.
Grade 
05/01/2019

Prusa i3 mk3s kit

I just want to say this printer is awsome, this is my second printer and i bought kit version and i order printer and received exact in 2weeks.kit took almost 10 hours and then some calibration process and then first print awsome.this is quality product and PEI metal sheet is great, layer is sticking very good and after finish the print very easy to remove from sheet.
Perfect printer !!

    Grade 
    04/21/2019

    Strepitosa

    Comprata più di un anno fa, e oggi aggiornata ad MK3S con MMU2. Lavora quasi tutti i giorni ed è sempre precisa, anzi migliora con gli aggiornamenti ogni volta. Credo di poter affermare che sia il miglior acquisto che abbia fatto, sono entusiasta. Grazie Josef Prusa.

      Grade 
      04/15/2019

      Best printer hands down

      I currently own 4 printers and this the Prusa i3 Mk3s is absolutely the best printer I own, and the second cheapest at that. I couldn't believe how easy it was to assemble and get printing. I have printed about 1000 hours on this printer since I recieved it and have only had two failed prints, and both were my fault. The printer has performed amazingly and I look forward to thousands more hours of printing. This printer is great for everyone and well worth the money!

      • 1 out of 1 people found this review useful.
      Grade 
      04/13/2019

      Fun to build an use!

      I recieved my MK3S KIT a little over a week from purchase. I must say that this kit was the most organized and impressive kit I've ever assembled! Everything was labeled and bagged according to component. The online instructions were very detailed and I really liked the user comments. Assembling the printer was an absolute joy! Word of advice, TAKE YOUR TIME! Also read each step multiple times to ensure you're doing it correctly, otherwise you'll have to disassemble and fix some things.

      I've logged about 15hrs on my printer so far and have been very impressed! I also really like the Prusa Slic3r program. It's easy to use and allows fine tuning and inspection prior to printing. I will likely buy another one in the future.

      Adam Boyd
      AL, USA

      • 1 out of 1 people found this review useful.
      Grade 
      04/08/2019

      One of the best printers I've ever had!

      Having used this printer after coming from a heavily modified CR10S. This printer beats that printer in reliability, quality, and ease of use in every way. With 1224 cumulative hours printed (50 days) and 1600 cumulative meters of filament (1 mile) in my first 4 months of ownership. It still is a joy to use! The kit was fun to build and was a fun experience. I also love how Prusa printers are upgradable via firmware (really easy) and hardware wise!

      • 1 out of 1 people found this review useful.
      Grade 
      03/29/2019

      A great experience

      I received my kit two days ago (I ordered last Tuesday) and finished the assembly today. What can I sayit is really a great experience to go through the assembly procedure. I never experienced such a good detail instruction and a goodie to eat while the process ????. I now going to print my first print. That far I can say that the printer is so silent and the auto leveling is also Amazing. So thank you Josef for that great experience. DEFINITELY CAN RECOMMEND THE PRINTER.

      • 2 out of 2 people found this review useful.
      Grade 
      03/29/2019

      Best of the best...Great Looking and Awesome Performing!

      I left an earlier review but think I submitted it without checking 5 stars. This is definitely a 5 star machine. The Prusa was my first 3d printer. My friends actually tried to talk me out of buying it. The said I could get 2 Ender 5's for the same cost as a Prusa. But after reading reviews and watching numerous youtube videos I made up my mind to get the Prusa. BEST decision ever! This thing is amazing! I bought the kit and really enjoyed assembling it so I could get to know my new printer and all of its inner workings. Printed a benchy that was nearly flawless. Even my buddy that told me not to get it was very impressed with how well it did on its first print. I am hooked! So much so that I bought another printer, an Ender 5. Well I am not impressed in the slightest. Granted it's a lot cheaper, but its a LOT cheaper compared to my Prusa. I will eventually buy another MK3S because once you own a Ferrari it's hard to own a Yugo.

      • 1 out of 1 people found this review useful.

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      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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