Hi, have you checked the nylon bearings for chips? Maybe you have some small chunks there,if so scrape them out, CARFULLY. I don't think you want to oil or grease the nylon bearing points, they would just collect more junk.
scott99
Put a little wax on them. Be careful though, you may find that it tilts far to easily. I tried a touch of oil, way to slick. furniture polish did the best. Fred
This is what I did. I have this stuff called hexa boron nitride. Its like a white graphite but way more slick. I use this mixed with carnuba wax to coat my long range bullets. I took this same wax/bn mix and gave a good coating to the base of my vice and presto. A little bit of this stuff goes a LONG LONG way if anyone wants to try it I will mail you some.