LoonyLib is the Loony Squad's OnShape parts library. This is a library of configurable parts which make it a breeze to design custom robots with non-standard dimensions. Inside you will find all manner of screws, shafts, extrusion profiles, wheels, electronics, belt tools, chain tools, and so much more.
Here is all the content in the library. The names in the table of contents match the names of the part documents, so if you are having an issue with a particular document, just search for it by name.
All of the LoonyLib docs are public! You can link them, copy them, export them, and modify them however you like.