Don, I've never done that type of service to my saw, and I don't plan to until the saw sounds different in any way. There's and old saying out there, something about "if it ain't broke, don't fix it". It'a a wise saying, It's just to sad that most people don't pay much attention to it. There should be no issues with your bearing, they are sealed. Even if you do add grease, it won't be getting to the bearings unless you break the seal. If you do that, then you deserve whatever happens. If you want to service and grease your saw, then grease only the parts that move. The pivot points and rocker arms, other then that there's nothing else to grease.
Len