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9" South Bend Spindle

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  • 9" South Bend Spindle

    Some of you guys have said that these lathes have a non standard taper in the spindle.
    On page 64 of the South Bend book "How to run a lathe" they say South Bend lathes use a "standard" Morse taper in both head and tail stocks.

    Just curious if this is a misprint or has somebody reworked your spindle at
    soetime?????????????


    Regards Graeme

  • #2
    the 9" lathes have standard mt3 tapers in the headstock, 2mt in the tailstock, well nearly all of them. Not going to say ALL of them because SB did make a lot of different lathes.
    Some of the larger lathes were the ones with non standard tapers.

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    • #3
      My SB9 has a MT3 spindle. I haven't heard of anything else being used.
      Free software for calculating bolt circles and similar: Click Here

      Comment


      • #4
        The early lathes all used standard Morse taper in the spindles. Later production 10" & larger used a non standard that is a kind of a Morse taper.

        I am not sure when the change was made, probably 60's or later.
        Jim H.

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        • #5
          my responce same as Evans
          scariest thing to hear " I am from the government and i am here to help"

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          • #6
            No M/T spindle here

            My South Bend spindle is of their propretary dimensions. No M/T center will fit my spindle without the adapter.

            All of the S/B Fourteens that we had while I was in school were of their propretary dimensions also. No M/T center would fit those spindles without the adapter either.

            I highly doubt the spindle in my 1939 Model 159Z was re-worked.
            Paying Attention Is Not That Expensive.

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            • #7
              That only applies to the SB lathes larger than 9 inches. AFAIK, all the 9" lathes are MT3.
              Free software for calculating bolt circles and similar: Click Here

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              • #8
                Makes sense

                Originally posted by Evan
                That only applies to the SB lathes larger than 9 inches. AFAIK, all the 9" lathes are MT3.
                I would suppose that this statement is true as my 159Z has a 9 1/2" swing.

                When SBL was still SBL, I was looking for information on my then new aquisition. I gave them the information off of the specifications plate. I was told "we didn't make too many that model."
                Paying Attention Is Not That Expensive.

                Comment


                • #9
                  Actually, the 9" South Bends are not 9", but 9-1/8" & 9-1/4" depending on model.

                  I do recall mention of an intermediate 9" lathe that existed for a short time before being enlarged to become the light ten or 10K. In the mid thirties, South Bend did not make a 10", just the 9" models. The next larger was an 11" machine.
                  Jim H.

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                  • #10
                    Yep, my SB9 will just make 9 1/8" over the bed. I suppose that is a relic of the days before exaggeration of the capabilities of a product. These days you buy a 26' tarp and it's only 24 1/2 feet long.
                    Free software for calculating bolt circles and similar: Click Here

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                    • #11
                      Originally posted by Evan
                      ... These days you buy a 26' tarp and it's only 24 1/2 feet long.
                      I have seen on the packaging, the ??'X??' are "dimensions before finishing".
                      Paying Attention Is Not That Expensive.

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                      • #12
                        I have seen on the packaging, the ??'X??' are "dimensions before finishing".
                        Uh huh. Before finishing ripping off the customer that is. The hem is no more than a couple of inches at each end but the last tarp I bought was a full 1 1/2 feet short.
                        Free software for calculating bolt circles and similar: Click Here

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                        • #13
                          Close Enough

                          Originally posted by Evan
                          Before finishing ripping off the customer that is.
                          Perhaps, they rough out the material in meters, finish in feet. After all the meter is only 3.657" LONGER than a foot.

                          That MUST be why your tarp is short.

                          I'm not sticking up for them. It's happened to myself too.
                          Paying Attention Is Not That Expensive.

                          Comment


                          • #14
                            The main point is that a 9" SB will really take 9" material with a bit of clearance to spare. Recently that was very nice to have when I was turning a cast iron pulley for a low speed grinder that I adapted from a shaker table. The pulley was a just a red hair above 9" diameter and fit with maybe .020 to spare.
                            Free software for calculating bolt circles and similar: Click Here

                            Comment


                            • #15
                              I believe the 10 L (heavy 10) and larger southbends have a Yarno taper in the spindle, 12 or 13 I think, and come with an adapdter to take a M.T. centre. My new to me Harrison also has a 13 yarno spindle taper, and it is fairly new manufacture (1969).

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