MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.

Download Now

Report as inappropriate

Yes, well spotted, it's designed for 2 bearings (the smaller ones use a single bearing.
I have run them with a single bearing and it didn't fail, but it was under a very light load, I think the wheel would pull off centre quite quickly without the second bearing.
Have fun...