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tpi

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    Adapter for Chuck

    Hi, I have a second hand lathe (no company markings, I think it was a home made tool), which I am trying to add an xact 4” jaw chuck to. I’m having trouble though as the screw on my head is 7/8” x 8 tpi. The new chuck has an adapter, to fit 3/4” x 16tpi, or I can connect directly to the chuck...
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