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Prusa i3 Bear Frame Upgrade Kit 2.1.1


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This is an aluminum frame conversion compatible with the following versions of the original Prusa i3:
- MK2
- MK2S
- MK2.5
- MK2.5S
- MK3
- MK3S
- MK3S+

Printed parts are offered as an option, since some users may prefer to print them themselves.

From: €79.99

To: €109.98

Price as configured: €0.00

Prusa i3 Bear Frame Upgrade Kit 2.1.1   +€79.99

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Price as configured: €0.00

Product Description


Prusa i3 Bear Frame Upgrade Kit 2.1.1

The Bear Frame Upgrade improves stiffness and reliability of the original Prusa i3 MK2(S), MK2.5(S)(S+) and MK3(S)(S+). It allows faster prints, increases precision, makes maintenance easier and opens the door to more customisations.

Compatible with Original Prusa i3 MK2(S), MK2.5(S) and MK3(S)(S+)
Compatible with lots of extruders like Original Prusa, BearExxa, BearMera (E3D Hemera) and Bondtech Prusa Upgrade
Reuse of as many parts as possible
Sturdy frame for faster printing
High quality extrusions
Improved accuracy
Reduced noise level
Easy to use and maintain
Built to last
Precisely engineered printed parts
Thoroughly tested development
Highly customisable
Detailed documentation via guides.bear-lab.com
Compatible with stock firmware (only if you use the Original Prusa extruder)
Active and open minded community
Truly open source

Build Documentation
Github folder with all the needed files

Kit Contents
- All aluminium rails pre-cut to size, mounting brackets, mounting plates, screws and nuts to execute the upgrade
- All rails/plates/brackets are black anodized aluminium
- Consult the complete Bill of Materials here.

WARNING: this kit does not use the Custom T-Nuts used on the original Bear project/documentation. Instead, it uses regular standard T-Nuts.

Optional: High quality PETG printed parts set

The printed parts set ships without:
- Build helper
- Cable clips
- Endcaps
These parts are not essential for the assembly and are considered mostly cosmetic. They can easily be printed by the user if needed.


This work is licensed under a GPLv3 license.


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