Bill of materials

This BOM is still a work-in-progress, if you will find anything incompatible feel free to contact me.

Printed plastic parts

You can find all the stl’s on github:

Metal parts

  • 2x Threaded rod M10x380 (property class 8.8 or higher)
  • 4x Threaded rod M8x210 (property class 8.8 or higher)
  • 2x linear shaft Φ8 370mm (hardened steel, HRC >60, tolerance 8h6)
  • 2x linear shaft Φ8 350mm (hardened steel, HRC >60, tolerance 8h6)
  • 2x linear shaft Φ8 320mm (hardened steel, HRC >60, tolerance 8h6)
  • 10x ball bearing LM8UU
  • 12x M10 nut
  • 12x M10 washer
  • 16x M8 nut
  • 16x M8 washer
  • 3x M3 self-locking nut
  • 27x M3 nut
  • 6x M3 washer
  • 4x M3x40 screw
  • 7x M3x30 screw
  • 2x M3x25 screw
  • 3x M3x20 screw
  • 24x M3x18 screw
  • 6x M3x12 screw
  • 16x M3x10 screw
  • 2x GT2 idley pulley
  • 2x GT2-16 pulley
  • 1x MK8 pulley
  • 1x 625ZZ or 625 2RS bearing
  • 6x Spring dia. ~4,8mm, length 8mm


  • 1x Power Supply 12V/240W + 2×2,5mm ~2m cable + power cable (eg. IEC C13)
  • 3x NEMA17 stepper motor with cables and ramps connector
  • 2x NEMA17 stepper motor with integrated trapezoidal screw Tr8x8 with cables and ramps connector
  • 2x Microswitch + 2×0,5mm ~1m cable (x2) + 2x 3pin ramps connector
  • 1x Arduino Mega 2560
  • 1x RAMPS 1.4
  • 3x A4988 motor driver (X, Y and E axis)
  • 1x DRV8825 motor driver (recommended for Z Axis)
  • 1x RepRap Discount Smart Controller LCD 2004
  • 2x 70cm IDC 10 pin cable
  • 1x 5015 turbine fan + 2×0,5mm ~1m cable
  • 1x 30x30x10 fan + 2×0,5mm ~1m cable
  • 1x LJ8A3-2-Z/BX-5V sensor + 3pin ramps connector
  • 1x 200×200 MK3 aluminium heatbed with cables and beta thermistor


  • 1x Prusa i3 vanilla frame (plywood: at least 9 mm thickness, or aluminium: 6mm, recommended with side supports, mounting holes for Arduino MEGA and in case of aluminium – holes for mounting power supply)
  • 1x Chinese E3D Bowden Hotend v6 with beta thermistor and 40W heater
  • 1x PTFE tube 4/2mm (< 10cm)
  • 2x GT2 belt
  • (at least) 12x zipties
  • (optional) 4x felt pad
  • (optional) 4x zipties
  • (optional) 1x nylon filament dia 3mm, 50cm length
  • (optional) 1x spiral wrap

Tools needed

  • soldering iron
  • small pliers
  • flatheat screwdriver (~3,6mm)
  • hex keys (depending on what screws are you using)
  • 13/17mm spanners
  • scissors (recommended for metal cutting)
  • (optional) power drill and 3mm drill bit

The overall cost of all the needed items (excluding tools and printed parts) is around $200 (its less than 30% of Original Prusa i3 MK2 price, however it depends how cheap you will find the printed parts, and if you already had the needed tools)

Printed parts done from ABS with layer height 0.2mm should cost around $50, depending on how expensive 3D services are near you place. You can also use PET-G for the parts. but PLA are not recommended for extruder parts.



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