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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.
We have temporarily disabled new orders of kits with powder-coated sheets until all orders from long-waiting customers will be shipped. More info
The lead time is 1-2 weeks for preparation of orders.
More info
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
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
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
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 (FEBRUARY 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 whenfilament 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 appliesfor 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
BASIC FEATURES
- Great build volume – 11,025 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. In Slic3r Prusa Edition you can set everything you want. PrusaControl on the other side is focusing on casual users, and it's very easy to use. 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 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
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 in | 25 x 21 x 20 cm | 9.84 x 8.3 x 8 | 25 x 21 x 21 cm | 9.84 x 8.3 x 8.3 in |
Layer height | 0.05 – 0.35 mm | 0.05 – 0.35 mm | 0.15 – 0.35 mm |
Speed | 200+ mm/s | 100 mm/s | 200+ 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 / | heated with cold corners compensation / | removable magnetic heatbed / |
Number of materials (simultaneously) | 1 | 1 | 5 |
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, | - | 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, | 2 thermistors | 4 thermistors, fans sensor, |
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 | - |
E-shop link |  |  |
Data sheet
| 3D printers | MK3 kit |
Reviews
Amazing printer!
I have it for 3 months now and it can not be compared with any other printer!It is an A+++ for everything.It is worth every penny!Good job.Keep it up!
- 3 out of 4 people found this review useful.
Make the life Easier
Several month ago I've bought a CR10S to discover 3D Printing. Ok, I've made some nice print but I've also spent a lot of time in tuning, set up and calibration.... The CR10 is noisy so I've change the fans... Fine, I've discover 3D Printing, Marlin firmware, Octoprint.... Then I've decided after watching videos and reading reviews to buy the MK3S.
I've received the Kit very quickly, I've enjoy to assemble it (with no problem).
First Start, auto test, calibration, 1st layer calibration.... What a surprise for the first try the result is quite perfect !!!
The printer works since 3 days without any problem.
This printer is definitively the best one !!
Thanks PRUSA Research.
- 7 out of 7 people found this review useful.
Super Fast Delivery and Support
These folks AWESOME. Have a few printers already but the most excited to assemble and use the new I3 MK3S. Yay!!!
- 1 out of 1 people found this review useful.
Technologically Advanced
I came from a cheap printer kit and that time prusa still has the classic mk1 that uses the typical mk2a heatbed, Then MK2 came out that offers bigger platform than normal 20^3cm as well as auto skew correction, I immediately bought that thing. Reason I owned this printer not because of its print volume, it is because of its accuracy. Probably MK3S will be the final printer that I'm able to own even if there will be MK4 coming soon.
The assembly manual are good and they introduced several things that I never thought of before for example leveling the z gantry via top z bracket, loosening the motor screw to have a good belt tension.
- auto skew correction
- auto detect for mis-aligned z-axis during bed probing
- belt tension compensation
- silent mode available.
The only downside is the motor, I personally think they should've opted in for a detachable wire nema17 motor instead of having motor with fixed cable length.
- 2 out of 3 people found this review useful.
Pretty Amazing Printer.
I already owned three other 3D printers. Two from a very closed-source company (in hindsight, not a good choice) and one from a kickstarter. I always had problems from bad bed leveling and adhesion, slow time, and excessively loud printing! However, after a couple weeks of browsing across different companies, I thought this was the best choice.
I bought the kit for $750. Got the MMU2 pre-emptively but that's a different story. My kit was equipped with the double-sided PEI steel sheet, and everything in the instructions was crystal-clear in a shiny book. All parts were included in the kit (nothing missing or broken) and the only broken part was my fault, but luckily I had a spare printer to make a new printed part.
Instructions are very clear; it's not hard, just time consuming! Make sure you're extra careful with the extruder assembly, but nothing else was notably difficult.
The features on this machine sure were delivered! The loudest part is the cooling fan, quieter than any of my other printers without a fan running. The sheet printbed is amazingly convenient, and even though it isn't plug-and-play, once you have it set up once it requires minimal maintenance.
I have amassed 750+ printing hours in 4 months on this machine. I've had maybe 2 or 3 prints that failed not because of filament. That power panic/recovery comes in handy!
If this is in your price range, I HIGHLY suggest getting this printer, or a higher model if you're reading this in 2025 or something. You will not get a better machine for this price.
I hope this helps, and good luck!
Mathieu
- 11 out of 11 people found this review useful.
Amazing DIY machine
It is now 9 month when it's printing day by day with no holidays. The original parts really does it's job. You will not find magnetic bed like this in other printer. Although if esthetics isn't really best for a home machine, instead of this you get best access to repair. If something broke just change it and go !
- 4 out of 4 people found this review useful.
Blown away by this kit!
This is my 2nd 3D printer. The first was a pre-assembled/pre-calibrated under $200 printer I received as a Christmas give and have been hooked ever since!
I researched the best printers under $1000 and found the Prusa brand. For all the features it delivers and reliability, I knew I found my next 3D printer.
Ordered it on 1/3/19 and received it on 1/14/19. Took me three days working on it after work to complete the build. The instructions were clear and concise and when I did have questions or issues, the comments by other buyers for each section were very helpful and saved my butt a few times.
Was very nervous turning it on the first time but it booted right up, calibrated everything just fine, and had no setup issues.
Ran my first test calibration print, the 3D Benchy, and holy carp did it print basically perfect! Josef, you have an amazing printer AND company!
- 38 out of 38 people found this review useful.
Amazing
I received my kit a week ago and had fun building it, it came out perfect! When printing it basically takes care of itself, no more frustration with bed leveling or bed surface issues. I was thinking $750 was a lot to spend but even though it is twice the price of my first printer it is worth every cent.
Bill
- 4 out of 4 people found this review useful.
Excellent kit and machine
I assembled it slowly but the instructions were clear and complete. The kit instructions are the best I have ever seen. The machine worked without a hitch and makes great prints without any special tuning.
My only comments are (1) the spares kit could include one heated bed spacer - that was the one part I dropped and dearly lost & it does not match anything from my extensive junk pile, and (2) perhaps the design could use an additional zip tie at the base where wires come very close to the x-axis bearings, and (3) perhaps add a warning to keep fingertips to the far edges of the build plate - first time I did not realize how strong the magnets are and got a pinch.
- 3 out of 3 people found this review useful.
I was ready to give up and then I got a Prusa.
I don't usually write reviews, You know, I'm a guy and reviews seem a bit like sharing feelings and thoughts, so its not my "Safe zone". Anyway, I just had to write this review because I was completely blown away by the entire experience in purchasing my Prusa i3 MK3 kit. Checkout was simple and the communication on order status and shipping was top notch. When I got the printer it was packaged in a very secure way. Noway these things come damaged. The instruction... wow.. such nice instructions. The people who wrote them should get an award for technical writing or something. I couldn't have asked for a more complete and easy to follow assembly. Don't get me wrong, it takes awhile (several hours) but it is so easy and fun because you really learn how the thing works in the process of putting it together. You can really tell a lot of engineering went into this. Such innovation and really an impressive design. It is so easy to use and this thing, is smart. So smart, I would say its smarter than the average user. It self calibrates and walks you thru all of the settings needed to get everything going. Anyone can use it. So before I got the Prusa, I bought a popular model from Asia. Everything went wrong. No support, missing parts, over priced, I still haven't gotten it to work right. I was ready to give up on the hobby as I started to realize I had more failed prints than successful ones. So I decided to try the MK3 and boy I am so glad I did. Now I finally know how awesome this hobby really is. I just ordered the MMU 2.0 upgrade and I can't wait to use it. One of the things that helped me decide on getting the Prusa was all of the videos on youtube of Mr Prusa and his staff. I am very impressed with everyone and their new facility. From the bottom of my heart. BTW Mr Prusa, your print farm is sooo cool. I wish I could visit and see it in person.
Thank you for such a great product and service
Chris
- 8 out of 8 people found this review useful.
Best Printer Ever
I am new to 3D printing but this is my second printer. I originally purchased a cr10s 500. I had bed adhesion and bed leveling issues. It was poorly constructed. The Prusa however was amazing. Putting it together was a lot of fun for me. The instructions were super clear. The print quality is completely dominating in comparison to other printers. I have not had a single failed print after getting my z adjusted correctly. I love this printer and I will probably always purchase Prusa printers from here on out.
- 5 out of 5 people found this review useful.
It's a Ferrari
Coming from a CR-10, this thing is a Ferrari! I'm going to order several more
- 7 out of 7 people found this review useful.