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Thread: 1945 sb 16/24

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    Default 1945 sb 16/24

    Hello all.
    I inherited this war era 16/24 and was hoping to gather information from the group. From what I know, it was set up for the Navy due to the swivel leg. ( I may be wrong )
    The previous owner had it spliced for 110 and I had an electrician look at it to set it up. I always thought it was 220, but he wasn't so sure and was thinking it may have been 110 all along.
    Any help and info from the group would be greatly appreciated.
    Thank you


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    Good morning, and welcome to the club...

    That is such a neat looking lathe, with the swiveling foot. I have never seen one like it. I can't help you with your electrical, but it might be more helpful to you if you were able to post some pics of the motor tag and maybe the wiring as it goes out of the motor.

    Brian

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    An electrician should know enough to look at the motor. That will tell you the voltage.
    As it's wired now, I think it's pretending to be 110v.

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    Thank You gentlemen. I will take more pictures of the wiring.

    My question is, were they ever wired from the factory for 110 ??? Or were they always 220.

    And for the war effort, would that change anything for having 110 ??

    I am trying to get the wiring figured out first and then work on cleaning it up to use like it was designed.

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    Your lathe would have been used in an industrial setting and likely had a 3-phase motor. It could have been 220/440v or 550v 3-phase. Definately not wired 110v as original in my opinion. Quite often, the original motors end up being replaced with single phase motors when they end up in the home shop market. I have a 16" SB that came with an inappropriate 220v single phase motor.

    Here's a link to South Bend specs. Page 48 is where the motors are.

    http://wswells.com/data/catalog/100B/cat_100B.pdf

    Brian

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    Thanks Brian for the link !

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    Quote Originally Posted by Mike Gre View Post
    If your drum switch works and reverses the motor then it must be 3 phase.
    Why is that?

    allan

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    Quote Originally Posted by kitno455 View Post
    Why is that?

    allan
    The drum switch reverses two phases so that the motor spins backwards.

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    You have a three line fuse holder, but only one fuse installed. It is likely the machine was originally 3 phase, but has been modified over the years. The problem here is you are focused on the wrong part. All that matters is the motor's needs. Once you show us that, we can make the rest of this stuff work usually.

    allan

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    Quote Originally Posted by Mike Gre View Post
    The drum switch reverses two phases so that the motor spins backwards.
    A drum switch can also reverse a single phase motor.

    allan

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    Quote Originally Posted by kitno455 View Post
    A drum switch can also reverse a single phase motor.

    allan
    I stand corrected. I did not know that.

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    Quote Originally Posted by kitno455 View Post
    You have a three line fuse holder, but only one fuse installed. It is likely the machine was originally 3 phase, but has been modified over the years. The problem here is you are focused on the wrong part. All that matters is the motor's needs. Once you show us that, we can make the rest of this stuff work usually.

    allan
    Yes photo of the box shows wired for 110 VAC right now, you got a hot{black wire} with a fuse and neutral {white wire}.Your box is for three phase power but only using one leg.

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    Thanks again for all the replies. You guys are awesome !

    I will get a few pictures of the motor tomorrow (monday) for verification.
    Any specific area ??

    Since this is most likely a 3 phase motor, and I don't have 3 phase at my home, what options do I have to wire this and allow the lathe to run effieciently?

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    Quote Originally Posted by EBW View Post
    Thanks again for all the replies. You guys are awesome !

    I will get a few pictures of the motor tomorrow (monday) for verification.
    Any specific area ??

    Since this is most likely a 3 phase motor, and I don't have 3 phase at my home, what options do I have to wire this and allow the lathe to run effieciently?
    I would not assume the machine is still three phase. You need to look for motor nameplate and wiring diagram, which might be inside the cover of the motor's junction box.

    allan

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    I, too, see indications of a former three-phase machine having been converted to single-phase operation. I'm guessing you'll find a 120V motor in the leg once you find the nameplate.

    Also, another observation: I've never seen a single tumbler SB 16" lathe with a hinged primary drive cover. I previously thought they were only fixed covers until the double tumbler QCGBs came along.

    Edit: Now that I think about it, maybe this was inckuded on the 16/24 machines to handle the 4" riser difference...?

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    Hello all. I was able to take some pics of the motor. Although I am not sure these will show much. It says GE but can't find a motor tag.
    Any help would be appreciated. My electrician is going to look at it tonight or tomorrow.

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    Old enough to be ring oiled. I'd expect three phase

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    Yeah, probably 3 phase. if your electrician thought he could convert that to single phase just by swapping some wires around, you need a new electrician You might take those covers off the top side of the 'GE' end and see if there are any labeled connections under there. If not, go digging into the other end of the cable, you should have three wires (and maybe a ground). The resistance between any two of those wires (other than the ground) should be the same as any other two.

    allan

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    Quote Originally Posted by kitno455 View Post
    Yeah, probably 3 phase. if your electrician thought he could convert that to single phase just by swapping some wires around, you need a new electrician You might take those covers off the top side of the 'GE' end and see if there are any labeled connections under there. If not, go digging into the other end of the cable, you should have three wires (and maybe a ground). The resistance between any two of those wires (other than the ground) should be the same as any other two.

    allan

    Thanks Allan.
    To be clear, I inherited it like this from a co-worker. My electrician is going to wire it correctly for me.

    Seeing the 110 cord cut into the wires made us both scratch our heads and wonder what happened.

    Thanks again for all the help fellas. I hope to have it wired soon and begin using the lathe for my projects.

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    I think a mirror and a good light would help you. I believe most motors are marked closer to the top. These motors hang upside down. It could also be marked on the side you can't see.

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