Spindle thread ?
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  1. #1
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    Question Spindle thread ?

    I know the spindle thread on my SB is 2 1/4-8. I have a few odd back plates in my extras bin. Two scale to be 2 1/4-6 and the other 1 1/2-8. I found the 1 1/2-8 could fit an Atlas or Logan lathe. I found nothing on the ones that seem to be 2 1/4-6, can anyone tell me what these might fit?

  2. #2
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    Quote Originally Posted by AeroTD&G View Post
    I know the spindle thread on my SB is 2 1/4-8. I have a few odd back plates in my extras bin. Two scale to be 2 1/4-6 and the other 1 1/2-8. I found the 1 1/2-8 could fit an Atlas or Logan lathe. I found nothing on the ones that seem to be 2 1/4-6, can anyone tell me what these might fit?
    The older 14 1/2" South Bend had/has a 2 1/4-6 spindle thread.
    Ted

  3. #3
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    Thanks Ted, they appear to be for mounting a flat back chuck. I'll probably clean them up, take some pictures, and see if anyone needs them.

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    Are you certain they are not 2 3/8 - 6?

  5. #5
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    PM sent
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