MK3 Tall Bear Upgrade
MK3 Tall Bear Upgrade
MK3 Tall Bear Upgrade
MK3 Tall Bear Upgrade
MK3 Tall Bear Upgrade
MK3 Tall Bear Upgrade
MK3 Tall Bear Upgrade

MK3 Tall Bear Upgrade

Regular price $134.99 $0.00



Please note that if you are building a Bear Kit for the MK2/MK2.5 you will need to follow the instructions here:


This is an aluminum frame conversion for the Prusa i3 MK2, MK2s, MK2.5 and MK3.

Josef PRŮŠA has created numerous of incredible 3D printers and its latest Prusa i3 MK3 is capable of very impressive print quality for a very low price. A huge thanks to him and all its team!

One of the down point of the Prusa i3 MK2 and MK3 is the rigidity of the frame. A very good project has solved those problems by using 3030 extrusion aluminum : Prusa 3030 Haribo Edition. So why another conversion build? Check the next section ;)

Why another conversion build?
Here are the features that explain why I decided to create another printer upgrade.

-Use as much as possible original parts (no need to print a new RAMBo cover nor change any cable, rods or firmware)
-Compatible with MK2, MK2s MK2.5 and MK3
-Let user choose between two versions :
      -Half upgrade : similar to MK3 and cheaper
      -Full upgrade : stronger but more expensive
-Highly detailed manual
-Use more aluminum and less printed parts (3D printed parts can crack and are less reliable)
-Use Openbuilds hardware :
      -Single platform of multitude compatible hardware parts (extrusion, plates, low profile screws...)
      -V-Slot offers more possibilities for printed parts and customization than T-Slot
      -Open source with powerful community
      -Easy to square and build
-Other type of aluminum extrusions can be supported thanks to parametric design (check Fusion 360 files)
-3D printed parts designed using advanced techniques like selective infill, clean vertical holes, sharp angle...
-Open source by providing STL, STEP and Autodesk Fusion 360 files

Full And Half upgrades
The Prusa i3 Bear upgrade is proposed in two versions: full or half upgrade.

Half upgrade : upgrade your MK2/MK2s/MK2.5 frame to MK3 type
Full upgrade : has a redesigned and stronger Z axis for all MK2 and MK3 printers but is more expensive

Upgrade comparison chart

Build Documentation
Github folder with all the needed files

What's included:
- All 2040 V-SLOT aluminum extrusions pre-tapped & pre-cut to size.
- All required brackets and mounting plates.
- All screws needed.
*All parts conformed to the Author's BOM.

All our extrusions are cut using high precision CNC machine with a tolerance of 0.3mm.

 Effective immediately: Please be advised that we will no longer be accepting order cancellations of the Full/Half Bear Upgrade kits after 7 days, if you are unable to wait the stated time (give or take a week), we kindly ask that you do not place an order, thanks for your understanding.

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