Snappy 3

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Crystal Clear action run.pngSnappy 3
Snappy small v3.0.png
Snappy RepRap v3.0
Description A cheap, printable 3d printer that snaps together with almost no screws, rods, belts, or strings, and uses only one bearing.
License GPL
Team Members RevarBat
Based-on Snappy
Files GitHub
Forum Snappy RepRap Dev Forum
Categories Category:3D printers
Machine Specifications
Current Version 3.0.3
Dimensions Length: 480mm [19"]
Width: 680mm [27"]
Height: 640mm [25"]
Build Envelope Length: 198mm [7.8"]
Width: 198mm [7.8"]
Height: 220mm [8.6"]
Materials Printed PLA, PETG, ABS with optional HBP
Replication By parts: 79% w/o cable chains. 85% with.
Build Cost (≈) US$216
Technology FFF

This article is about the Snappy RepRap v3 Printer.

PLEASE NOTE: This is the current home for community generated documentation (Please Contribute!). The official Snappy documentation is maintained at GitHub. Please refer to that site as well.

The previous version 1.1 received Honorable Mention in the (un-awarded) Gada Grand Personal Manufacturing Prize, and holds the Guiness Book of World Records 2017-2018 entry for "Most 3D-Printed 3D Printer."


Snappy is an Open Source RepRap 3D printer designed by RevarBat from July 2014 to January 2018. It is a true RepRap, using very few non-printed parts. This design needs no belts, pulleys, metal rails, and almost no screws other than to mount parts to the motors. This means that you should be able to put one together for about $216, including the price of plastic to print parts. The entire thing snaps together, and you should be able to assemble it from parts in only a couple hours. The few required non-printable parts are available world wide from a variety of suppliers.

A prototype of the v3.0.3 version of the Snappy RepRap 3d Printer

Snappy is an original design, created in OpenSCAD, so many individual design parameters can be altered to fit the end user's specific needs.

You can see video of a prototype of Snappy version 3.0 running here.


These specifications are for the Snappy RepRap 3:

  • Printed Parts: around 63 different parts, not counting cable chains.
  • Non-Printed Parts: Motors. Electronics. Glass build plate. Six 3mm screws. Six 3mm nuts. One 686 bearing.
  • Printing Size: build area of about 7.8" x 7.8" x 8.6" or 198mm x 198mm x 220mm
  • Material Cost: US$ 40
  • Cost: Under US$ 216 (all parts, including plastic)
  • Precision: about 0.05mm XY, 0.01mm Z
  • Speed: 100mm/sec (position), 60mm/sec (printing)

Non-Printed Parts

The full list of non-printable parts for v3 are:

  • 1 Power supply (12V, 120W)
  • Controller electronics (RAMPS is cheap!)
  • 4 Mechanical limit micro-switches
  • 5 Stepper motors (NEMA17, 40mm long, 1.5A/phase)
  • Wiring
  • 6 screws (3mm x 12mm)
  • 6 nuts (3mm)
  • 1 Bearing (686)
  • 2 Cooling fans (40mm)
  • 1 Standard J-Head MkV extruder hot end
  • 1 Extruder drive gear
  • 1 Borosilicate glass build platform (about 200mm x 200mm)

Files and Documentation