My new Monarch 60/61 lathe
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  1. #1
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    Default My new Monarch 60/61 lathe

    Well this beautiful piece of american iron followed me home today. I've been looking for something a little bit larger then my south bend 10L and I think this will do. Now I just need to get it off the machine skates and powered up.
    Attached Thumbnails Attached Thumbnails 20191210_194541.jpg   20191210_194650.jpg   20191127_110758.jpg  
    Last edited by dannyrocci; 12-11-2019 at 02:41 AM.

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    Cant go wrong with that, looks to be in good shape.

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    Hey Friends, need a little help. Pulled out the giant 7.5 hp motor out the monarch today to rewire it to 220v 3 phase. Man is this motor giant, not sure how its only 7.5hp, it's twice as big as my 15hp motor on the rotor phase converter. I put a 1 gallon paint can next to it in the picture for scale.

    Unfortunately when I got it out I noticed that not all the wires are label. Was wondering if anyone can tell me how to sort out the wiring, so I can get this up and running? Line 1-2-3 are labeled but nothing else is. I can tell base on how it is wired now, that it is wire for 440v but that is about all I know. Any help would be greatly appreciated.

    Thanks!
    Attached Thumbnails Attached Thumbnails 20191214_181524.jpg   20191214_182449.jpg  

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    That looks really nice. Looking forward to seeing more of that machine.

    This method has been cited many times over the years, and is probably just the trick. You can find an archived copy here.

    Identifying Leads of a Nine Lead Three Phase Motor

    Also available here, mid page, but this location will probably change again.

    U.S. MOTORS – Frequently Asked Questions (FAQ)

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    Quote Originally Posted by dannyrocci View Post
    Hey Friends, need a little help. Pulled out the giant 7.5 hp motor out the monarch today to rewire it to 220v 3 phase. Man is this motor giant, not sure how its only 7.5hp, it's twice as big as my 15hp motor on the rotor phase converter. I put a 1 gallon paint can next to it in the picture for scale.

    Unfortunately when I got it out I noticed that not all the wires are label. Was wondering if anyone can tell me how to sort out the wiring, so I can get this up and running? Line 1-2-3 are labeled but nothing else is. I can tell base on how it is wired now, that it is wire for 440v but that is about all I know. Any help would be greatly appreciated.

    Thanks!
    Here's an old thread on old vs new motors and why the old ones are so big.

    Old vs New Motors

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    Quote Originally Posted by Glug View Post
    That looks really nice. Looking forward to seeing more of that machine.

    This method has been cited many times over the years, and is probably just the trick. You can find an archived copy here.

    Identifying Leads of a Nine Lead Three Phase Motor

    Also available here, mid page, but this location will probably change again.

    U.S. MOTORS – Frequently Asked Questions (FAQ)
    Got the motor wiring figured out last night and now it runs like it should. Thanks again for pointing me in the right direction. Now I just need to clear out the old wiring, install the VFD and rewire the switches.
    Attached Thumbnails Attached Thumbnails 20191217_181215.jpg  

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    Quote Originally Posted by marka12161 View Post
    Here's an old thread on old vs new motors and why the old ones are so big.

    Old vs New Motors
    Thank for the link to the motor thread, its always interesting to learn something new.

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    Nice lathe. It's a Series 60. I have a bigger 61. They are great lathes. Mine is a 15 hp (bigger swing) and I had the exact same issues with the motor, as it was also wired 440. I like your top speed of 1200. Mine is 800. Enjoy.

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    First time I've seen one showing 1200 RPM on the plate.

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    Danny,
    I am running a 7.5 hp. motor on a 5 hp VFD on my model 60, it works fine. You probably wont be able to use the old switches and contactor with the VFD. You will control everything with low voltage and tie switches into the front of the VFD. It takes some time to figure it all out.

    Mark

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    Yep, I have already taking out the old contactor, as its 440v and I cant use it. I am going to use the old push buttons switches but they will have to be rewire, so that they run through the low voltage inputs on the vfd. Hopefully I will get sometime over Christmas to get out in the shop and it wired up.

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    Quote Originally Posted by hawkfan9 View Post
    Nice lathe. It's a Series 60. I have a bigger 61. They are great lathes. Mine is a 15 hp (bigger swing) and I had the exact same issues with the motor, as it was also wired 440. I like your top speed of 1200. Mine is 800. Enjoy.
    Yea, I was pretty happy to find out that it was the higher top speed when I went and looked at it, I think it will be a great addition to the shop. I am really looking forward to using it but trying to make sure I do my due diligence before I start making to many chips with it. I need to finish up the wiring, flush out the old oil and make sure everything is getting the oiled as it should. If you have any advice as to things I should look at at would be awesome.

    Thanks,

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    Can you post a picture? I might have use for it.

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    Well now that I got this out does anyone need/want it? It will fit in a flat medium flat rate box and you can have it for the cost of shipping.
    Attached Thumbnails Attached Thumbnails 20191223_215042.jpg   20191223_215046.jpg   20191223_215051.jpg  

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    No advice, other than what you're already doing. My own rules for myself, as all my machines are vintage.....trust nothing. Change all the oil, verify that everything is working. Pop the top, and do a physical inspection to make sure oil is getting where it is supposed. These are beautiful machines. My 61 is so smooth and strong, and it makes very accurate parts. It would be a damned shame to ruin it because I neglected to change the damned oil! You're on it. They are as good as it gets, and what they lack in top speed, they make up for with depth of cut and feed rate power. .250" DOC and .020" feed is standard for me when moving metal, and it'll do much more.

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    Quote Originally Posted by hawkfan9 View Post
    No advice, other than what you're already doing. My own rules for myself, as all my machines are vintage.....trust nothing. Change all the oil, verify that everything is working. Pop the top, and do a physical inspection to make sure oil is getting where it is supposed. These are beautiful machines. My 61 is so smooth and strong, and it makes very accurate parts. It would be a damned shame to ruin it because I neglected to change the damned oil! You're on it. They are as good as it gets, and what they lack in top speed, they make up for with depth of cut and feed rate power. .250" DOC and .020" feed is standard for me when moving metal, and it'll do much more.
    Well, I got chance to get back in the shop and do a little more work on the monarch. Opened up the headstock and looked everything over, as far as I can tell everything looks good in there. I am going to take the oil lines off and make sure they are all sending oil as they should. Here is a couple pictures of the inside. If anyone sees anything to be concerned about please let me know. Also, what oil would you guys use, in the Headstock and feed box?

    Thanks

    Danny
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    Last edited by dannyrocci; 12-30-2019 at 09:14 PM.

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    Quote Originally Posted by dannyrocci View Post
    Well now that I got this out does anyone need/want it? It will fit in a flat medium flat rate box and you can have it for the cost of shipping.
    Not sure how I missed this post, holiday hectic-ness I guess... I would try it if you still have it.

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    Quote Originally Posted by Rob F. View Post
    Not sure how I missed this post, holiday hectic-ness I guess... I would try it if you still have it.
    It's all your. PM in your box

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    I was also able to spend sometime getting all the wiring, mostly done. I'm still waiting on a din breaker for the 110v circuit but was able to get the VFD wired up and all of the original controls wired into the vfd. I add ON/Off buttons because the only way to turn the machine on before was at the breaker and that seemed inconvenient. I'm using some temporary buttons that I had laying around but order some vintage ones that will match the original buttons on the machine. Took longing then I wanted to get wired up but I'm not electrician, so there is always a fair amount of double checking, as I don't want to fry anything.
    Attached Thumbnails Attached Thumbnails 20191227_152532.jpg   20191227_195252.jpg   20191229_192607.jpg  

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    Quote Originally Posted by dannyrocci View Post
    I was also able to spend sometime getting all the wiring, mostly done. I'm still waiting on a din breaker for the 110v circuit but was able to get the VFD wired up and all of the original controls wired into the vfd. I add ON/Off buttons because the only way to turn the machine on before was at the breaker and that seemed inconvenient. I'm using some temporary buttons that I had laying around but order some vintage ones that will match the original buttons on the machine. Took longing then I wanted to get wired up but I'm not electrician, so there is always a fair amount of double checking, as I don't want to fry anything.
    Nice work....


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