13” compound ball crank retainer and dial thumbscrew specs.
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  1. #1
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    Default 13” compound ball crank retainer and dial thumbscrew specs.

    I recently acquired a 13” 145b that needs some love in the compound department.

    For lack of a replacement part source as of yet, I was hoping someone might be able to tell me the compound ball crank retainer nut thread pitch?

    EDIT The compound ball crank retainer nut is .555" diameter and 5/16-24 thread.

    Does anyone know the thread size used on the compound dial’s thumb screw?

    Thank you
    Last edited by John Strange; 08-03-2017 at 05:43 PM.

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    My T lathe SN 142442 has a 10/32 thread in that dial. The screw is a slot head set screw,not a thumb screw. A thumb screw might be good. Hmmm.

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    k3vyl, thank for the info. I believe the screw in my cross feed is slotted as well. I assume the missing compound screw would also be slotted. I informally called it a "thumbscrew" because the one on the cross feed while slotted is also knurled. At any rate I will try a 10-32, thanks.

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    The ones on mine are set screws that are flush or below the diameter of the dial. They are tricky to loosen when facing down. I had a Logan that had nurled head screws on the dials,easier. There may be brass pads under the screws,I forgot to check that when I took mine out. Check the parts list in the stickeys.

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    Mine had one original slotted screw and one cobbled up mess put together from what looked like a machine screw with a nut soldered to it. I replaced both with a brass thumbscrew cut to length.

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    Mine (both compound and cross slide) are knurled and have a screw slot, about an 1/8" thick head; looks original.

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    Thank you all around for the bits of info and thoughts. Thankfully I managed to get my compound back in order.


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