I am trying to upgrade my closet rollers. Because the track and just about everything is wonky/not level/etc I found that this style of roller works much better. I really need to be able to lift the closet door up quite a bit and its important the wheel cant just fall out of the bracket.

But at 10$ a piece I am not keen to buy them plus the holes don't line up with the previous wheels used.

I am planning to attempt to design 3D print this in a thicker/strong and fiber enforced filament. It might be a terrible idea but I am going to go for it. Since my doors aren't mirrors and are very hollow I think I can get away with this. But if I dont, lesson learned.

I am also thinking about incorporating springs to give it a bit of play given neither the top nor the bottom of the track is level.

There is one piece of hardware I would like to incorporate though which would essentially be a sort of stopper for the bolt. I will of course use a thick machine bolt but what should go where that bolt contacts the other piece? Is there a piece of hardware you can sort of put at the end of a bolt to hold and support it without threads so that it can spin freely?

I am planning to essentially put 1 bolt with one nut to support it in the top piece. Then one of whatever I can put to support it on the bottom one.

https://preview.redd.it/x29vn57yxvkd1.png?width=636&format=png&auto=webp&s=982bc52fff4cc464b89c5ed9b855f5eda7ae1756