I wanted a model of an aircraft turbine engine, but why spend money on parts. Nuts and bolts are cheap. But what about bearings? That's why I created a roller bearing. No supports, simple printing at a fraction of the price, and it's ready in no time. Good luck with the printing :-)

You can find the 6003 bearing here: https://makerworld.com/en/models/445404#profileId-351852