Prusa i3 MK2

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Prusa i3 MK2 Documentation
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Prusa i3 MK2

Release status: working

Prusa i3 MK2 is a design by Josef Prusa.
CAD Models
External Link

The Prusa i3 (iteration 3) MK2 is the newest and most current 3D Printer design by RepRap Core Developer Prusajr. The i3 MK2 incorporates lessons learned from the previous three Prusa designs. See also Prusa Mendel (iteration 2).

Infobox info icon.svg.png Derivates
The Prusa i3 is a very popular design, which led to many people creating derivates. We list these derivates in Category: Prusa i3 Derivate. Also check the Prusa i3 Variants page, as well as the Prusa i3 Development page


Main improvements

The following is a list of the main improvements made upon the Prusa Mendel Iteration 3

  • Enhanced frame rigidity by conection the Y axis to the PSU cover.
  • Easy assembly
  • Bigger build area (250x210x200mm)
  • Zoned PCB heatbed MK42
  • Better Z motors


The development of the Prusa i3 MK2 is hosted on github:


Offical kit available (May 2016)

In May 2016, the official kit became available from Prusa.

Printed Parts

OpenSCAD files for the printed parts are available on the Github repository.


Stepper Motors

The Prusa i3 MK2 uses, including the extruder, 5 NEMA17 stepper motors. Two of these motors, the Z axis motors, are connected to the same stepper driver of the electronics and have integrated trapezoid leadscrews.

Controller Electronics

In it's original configuration Prusa i3 MK2 is using RAMBo mini board from Ultimachine.



Prusa i3 MK2 extruder is designed around E3D V6 hotend.

Heated Bed

The Prusa i3 MK2 was release together with PCB Heatbed MK42.