Gearbox Oil as lubrication for linear guides and ballscrews

i would stick to a way oil they have additives referred as tackifiers to keep the oil from running off. i used grease at first but had problems with the grease not letting things roll and they slid instead causing problems. the cheap ball screws with the plastic ball returns did not like the sliding caused by grease in my case. Vactra way oil no, 2 and ISO grade 68 should be the same they are just different classification systems. Vactra no,2 is pretty common on the commercial machining centers.

So, in the end gearbox oil is not so bad i would say. For now i'll use gearbox oil for building the machine, and upgrade to way oil in the next oiling or when a long project is ahead.

Thanks a lot guys

i think SAE 9 is another alternative to the other way oils talked about here but don't hold me to that after looking at another chart 20W has the Equivalent Viscosity of ISO 68 and no. 2 way oil from a quick search.