On decent machines usually a ballscrew is already setup with a lubrication point. Often even an auto or oneshot oiler feeds way oil to that point. However, on cheaper machines ort home built machines they seem to be run on the grease originally packed in the nut until they die. I don't know how long that is usually, but it can't be the 20+ years of some of the big mills with auto oilers. What can we do to improve the life of those cheap ballscrews a lot of us can afford for our home builds? A tear down and regrease hardly seems practical. Often that very assembly process of the machine is part of its accuracy and alignment. Tearing it apart to get to a ball nut to service it hardly seems wise.

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