My searching skills have failed me. Years ago I read that you can replace the balls in loose rail slider blocks with slightly oversize balls to get them running well again, but I can't find anywhere to actually buy them aside from Thomson Linear, which only sells big boxes for several hundred dollars. There they have a value called gauge, which is P05 for .0005" oversize and P10 for .001" oversize. But I can't find anyone else using that naming system, and search results involving the word gauge are drowned out by measuring devices.
My particular need is for SFU1204 ball screws on my CNC, which use 3/32" balls. Last time I had one get worn I just bought a whole new ball screw since they don't cost much, but it's a shame to throw out an almost-perfectly-good piece of equipment. I had intended to make an adjustable split-nut using the spare nut from the old one, but was unsuccessful. I suppose I could try again, but if anyone knows a source for oversize bearing balls in reasonable quantity, I'd like to try that first.
