I have a 1 HP slow speed bench grinder that is making bearing noise. I finally got it apart and the bearings on each end of the shaft are 6204-2RZ bearings. It seems easier to find 6204-2RS bearings than it is to find 6204-2RZ bearings. I've tried making sense of the markings and what they really mean but I'm a bit more confused now than I was when I started this search for bearings.
Can I use 6204-2RS bearings or do I need to get an exact replacement bearing (6204-2RZ)?