I replaced all mine in 2018 with VXB 6000ZZ 10x26x8 shielded bearings. I haven't used the saw daily but they only lasted a little over 2 years. They don't grind but you can barely turn them with your fingers when all pressure is off.

Since they're shielded can they be cleaned and re-greased somehow? And the shield replaced without damage? Or maybe drip some 3-in-1 oil into them instead? I have to replace or clean all 6.

But there are a number of 6000-2RS or 6000RS sealed bearings on Amazon for pretty good prices. Maybe that's the better way to go?