Thank you for the responses. I liked Silverbullet's suggestion of oiling them. This mill will probably never be run hard again. My use will be light duty, hobby work. The next time they need relubed may be in another 50 years when the grease is dried out again. I decided to drill and tap for two 1/8" NPT plugs for oiling purposes. I'm not installing oil cups because oiling will be infrequent.