What oil should I use to lubricate the linear bearings?
The only oil we use and recommend for lubrication on the Nomad rails is Super Lube Synthetic Oil with PTFE. It’s available from Amazon in various container sizes and types as well as some sewing machine supply shops:
To apply it, move the X or Y carriage to one extreme, wipe a thin layer of Super Lube onto the rails and then jog the carriage back and forth. Most of the oil will be pushed aside by the bearing seals but some of it will get in there, and that is enough to do the job.
After you’ve jogged the carriage back and forth a few times, wipe the remaining oil from the rails so that it doesn’t attract dust.