Originally Posted by
CL_MotoTech
You have a one-shot oiler, switch to oil. There's a reason why bearings have higher RPM ratings with oil than grease (it doesn't matter if it's Kluber or cheap grease).
To add oil I made a plate that sits inside the mill head where the gear used to be, it has a compression fitting for the oil line, the oil literally drips from the fitting onto the top bearing and uses gravity to lube the bottom bearing. I'm using Vectra way oil. When the ways get oiled so does the spindle. The plate is glued in place with silicone sealer. Certainly a bit jenky, but trying to drill and tap holes down in there would be challenging and there's no reason the plate will ever need to come out. The plate has a hole that's slightly larger than the splined section of the spindle, which also helps to keep dirt and other things out of the spindle from the top side. The entire project took like 12 minutes. It's very simple but will get you to higher RPM and longer bearing life.