What do people use to lubricate the straight (non-threaded) Z-axis rods?
I've seen to use sewing machine oil for horizontal rods and PTFE/teflon lubricant for Z-axis threaded rod,
but no one seems to talk about the non-threaded Z-axis rods. It seems like the sewing machine oil would be called for.
What do people use?
I use white lithium grease on the threaded rods and the guide rods.
Light oil is probably fine too for the guide rods.