I was a printing press mechanic for 27 years. We had drum folders that ran at 1200-1350 feet per minute, 8-12 hours per day, 5 days per week. There were 16 each of 3/4" cam followers in these folders, and this was the sole actuating component. We routinely rebuilt these folders every 3-4 months, replacing all the followers. The only thing that I ever saw that contributed to early failure was axial thrust...they are not designed for and do not tolerate appreciable side loading. We had to replace the arms that held the followers if they developed enough wear that would allow the follower to track to one side or the other to prevent early failure.

It sounds like your saw was designed for this kind of industrial production duty. Typically the folowers come with one or two grease ports that require a press-in zerk fitting, and there is a grease port provided on the shaft if lubricated through the arm that holds the follower. Typically they are slush lubricated from the factory and should be greased before installation. Plugs are included to block the ports on either end, but I have had to make a 1/8" brass plug for the port on the shaft as well, to keep grease frrom escaping there from a poor fit in the arm if greased from either end. You can blow the seals on the sealed variety from exuberant over-greasing. Stainless steel is good for food-safe environments, but it's hard to imagine a hobbyist requiring it.

My advice is to grease them well at the outset and then plug all the unused ports, including the grease port on the shaft if unused. An early indicator of wear is side play in the outer race or rust coming out from the sides of the bearing.