I have an older Robland jointer-planer. The planer table moves up and down, supported by a large central column, driven by an acme thread. It is becoming squeeky and a bit rough when I move it, clearly needing lubrication. The question is what is the appropriate lubricant for the acme thread? I'm concerned that using a grease like Lubriplate will get the thread gunked up with sawdust. Do folks have other suggestions for this purpose? Thanks.
-Howard