I still haven't gotten around to changing the set on my 1988 510 yet. The originals are still fine but I bought a good quality set locally that are a bit softer (I wasn't really after softer) and have the ball bearing swivel bearings. I tend to get annoyed when I want to go left but it wants to go right.
I find it a big PITA to unload it to flip it over on sawhorses to lube the stems. I have a small cabinet to mount under it (and one for a Mark 5) that I bought at a garage sale and when those are in place it will be even more of a PITA. Flipping them over and cleaning and lubing them works wonders but doesn't last long enough and they start fighting back again. The casters think lubing should last 6 or 8 months and I think it should last 30 years.
I'm still going to try the new set on the 510 but with 5 Shopsmiths in the shop, the double drill-press and the router table on a SS base I can't afford that many ball bearing swivel casters. I'm going to try something else. I want to try popping the casters out and after cleaning using a small brush to paint the stems and sockets with graphite paint. I have used it on a lot of things on the farm over the years. Back in the days of handling ear corn I used to paint the floors of hopper wagons with it so the ears would slide out smoothly without jamming. It would last for several years and polish with use to the point that you could not stand on those sloped floors.
I use it constantly as a spray on coating for many garden tools and especially on digging shovels where it keeps dirt and mud from sticking to the faces.
In the farm shop I have a steel cabinet of heavily loaded drawers that slide on steel runners of thin angle iron against the steel drawer bottoms. They worked fairly hard so I painted the bottom corners of the drawers and the angle irons with graphite paint and they have worked beautifully for a long time now.
One trade name is "Slip Plate" and other names are usually similar. As opposed to oil or grease that graphite paint does not attract dirt. I'm going to try it on the SS's.
Footnote: You don't want any of it on any tool surfaces where wood slides, it does rub off on wood.
I did not equip with Shopsmiths in spite of the setups but because of them.
1 1988 - Mark V 510 (bought new), 4 Poly vee 1 1/8th HP Mark V's, Mark VII, 1 Mark V Mini, 1 Frankensmith, 1 10-ER, 1 Mark V Push-me-Pull-me Drillpress, SS bandsaw, belt sander, jointer, jigsaw, shaper attach, mortising attach, TS-3650 Rigid tablesaw, RAS, 6" long bed jointer, Foley/Belsaw Planer/molder/ripsaw, 1" sander, oscillating spindle/belt sander, Scroll saw, Woodmizer sawmill