Have been reading all afternoon and only managed to muddy the waters more.

I have a spindle that needs bearings, its a QC30 and i want to fit in my BR2J head.

Does anyone know of suitable bering codes - i have read stories that quote super-special-££££ items and then this that fitted off-the shelf items and all are happy, seems a good angular contact pair is needed but what code do i search for??

Any help appreciated.