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- Jan 4, 2021
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- 2,851
I can still see the department toolmaker using an oil can to apply sulfurated lard oil to a part in the lathe, then running a line of it on the leadscrew, something he had learned as an apprentice probably 40 years before. Of course, that was almost 50 years ago, and sulfurated lard oil isn’t as common now, and what there is has been reformulated (I still have about a pint left from what he gave me, use it occasionally when the modern stuff doesn’t work).None of my chucks are sealed against machining swarf. Chips will find their way into the interior causing jamming and wear. I lightly oil the scroll and jaws on reassembly to provide some lubricaton and prevent any rusting. Aside from that, the oil used for machining provides necessary lubrication.