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Sheldon Sebastian 16" X 60" I Think

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76kcfdcapt

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#1
Hi, I don't post here often. I have posted about my Comet Bport Taiwanese copy.
I have had this lathe for 20 years in storage. It was long past time to get it in to my shop and working again. It was inherited from my grandfather. It says Sheldon Sebastion, have not had a chance to clean the info plates or find the serial numbers. It appears to be in quite good shape except for the surface rust. Came with a 3 and 4 jaw chuck, steady rest, faceplate, taper attachment and few odds and ends. It is now in my shop after quite a bit of rearranging. (no pics yet). It does not have the original motor and I have not dug in to it to determine if it is single or three phase. I can run it either way since I built a converter for the three phase mill. It is a heavy beast for sure! I was hoping for a smaller lathe but I already have this and I do have projects I can use it for. I will post more info as I clean it up. Any info from members here would be appreciated. Hope this is the right place for this.
Glen


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#2
Glen,

You have a old Sebastian lathe built before Sheldon bought out part of the business. Actually the lathe business was bought out by the D.C. Morrison company which is still in business today making and selling keyseaters. Sheldon never did support the old Sebastian lathe line. Instead they built their own gearhead lathe called "Sheldon-Sebastian". I have a 13" that I've owned since 1978. There is some resemblance, nothing interchangeable between the two brands. D.C. Morrison does not show it as part of their website anymore. I suspect they still support repair parts for the lathe if requested. Don't expect any operations/parts manuals from these guys. The internet is full of information on these lathes.

Ken
 

76kcfdcapt

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#3
Ken, The tag on the machine says "Sebastian" and then another tag says "Sheldon machine or lathe Co.", cant remember exactly and I am at work right now. So I think it was built after the takeover?
 
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#4
Post pictures of the tags and serial number. I'm interested in redefining the history of Sebastian Lathe Company and the transition between D.C. Morrison and Sheldon.
 

76kcfdcapt

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#5
I think that the thread pitch info may have come from a different lathe hence my confusion. Here are the tags.

IMG_1824.JPG IMG_1825.JPG IMG_1826.JPG IMG_1827.JPG IMG_1828.JPG
 

76kcfdcapt

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#6
Can someone tell me the sequence to removing the feed/thread gears? I am not quite sure how to remove them, I could probably figure it out but I don't want to break anything,
Thanks, Glen
 

76kcfdcapt

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#7
Did some investigating and clean up today. I thought this thing was going to be clapped out but it is actually in quite good shape under all the rust and grime. The inside of the gear box was perfect, shocked. The feed gears were dirty, some surface rust, cleaned them up. Clutch mechanism was dry and surface rusted, works perfect now. Cleaned the 3 and 4 jaw chucks so they are ready. Took a look at the motor, it is a single phase 3/4 hp. I am sure this lathe came with a bigger motor but I think for what I am going to use it for it should suffice, crossing my fingers. Still have to get the front change gears off and cleaned up, still not sure how to go about it.

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FOMOGO

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#8
I think it's great that it was handed down from your grandfather. Your probably going to find that 3/4hp motor pretty underwhelming on a 16" lathe. Were it mine, I would go with 3 phase 5 0r 7.5 hp with a VFD. Should be fun getting it up and running no matter which route you take. Cheers, Mike
 
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76kcfdcapt

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#9
Mike, I can do that if I need to, I have a rotary phase converter already to run my mill. I will try it and see what happens, not hard to find 3 phase motors at least. When I inherited it I had no shop and was lucky to find a place to store it. I should have got it going sooner but I had other priorities.
Glen
 

76kcfdcapt

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#10
I also checked the swing and length and it is a 16" swing and the bed would take 60" between centers, it is a little over 72" from the headstock to the end of the bed.
 
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#11
The gearing in the headstock looks nice. Be sure to put some fresh oil in the headstock. My preference is ISO 46 hydraulic oil. Do not put gear oil in the headstock! The gearing on the outside of the headstock that feeds into the QCGB is in decent shape. Unless you just want to take it apart I would leave it alone. Saturact in ISO 46 oil and let it run. If you decide to remove the gearing, make you a skecth on paper the arrangement of the gears so you will know how it goes back together. Just start with the outer most one and remove, then remove the next gear and so on until you have them all removed. They are not press fit on the studs, should slip right off without any effort.

I'm real surprised to see a Sheldon name on the lathe. I highly doubt there were many sold of this design under Sheldon. Probably used up the stock on hand until the new Sheldon-Sebastian lathe took it's place in the early to mid 1950's. Now we know another piece of the pie of it's existance under Sheldon. Ken
 

76kcfdcapt

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#12
Ken, I think that the info on the quick change is not from this lathe, it just sits there on an aluminum box, not original. It is the quick change gear box I want to remove and clean, already did the ones that feed it as you said.
 
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#13
Got a picture of the front of the QCGB? I hope you can remove the lead screw before removing the gearbox. May not be the case, hard to say without more pictures. I know on my Sheldon Sebastian lathe, the lead screw is pinned to the output shaft of the QCGB.
 

76kcfdcapt

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#14
Here are some pics. From what I can see so far it may have to come off with the lead screw. I see no way from the outside to disconnect it. They are a little dark, ran up to shop real quick to get pics, needed to turn on more lights.

IMG_1848.jpg IMG_1846.jpg

IMG_1847.jpg
 

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76kcfdcapt

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#15
Also the 3/4 hp motor can't even spin the clutch to full speed when it is disengaged. So I am on the hunt for a 3hp 3 phase motor. Going to look at some tomorrow. I already have a rotary phase converter so it should be easy to get it wired up. I don't think this lathe ever did any work with that motor in it.
 
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#16
I believe you are correct, the QCGB will have to come off with the lead screw attached. That's going to be fun. I would crank the carriage all the way to the tail end of the bed when you get ready to remove. Thanks for posting the pictures. Let us know how you make out with the removal. Ken
 

76kcfdcapt

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#17
Thanks Ken, I think I will remove the carriage and clean it up at the same time so it will be out of the way.
 

76kcfdcapt

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#18
So as these things go sometimes, while on the hunt for a motor for the Sebastian I found a Logan 2535 VLH lathe. It was stuffed in a seatrain full of tools, not hooked up and to crowded to use anyway. Obviously I could not leave it there so I made the deal since the woman who owns the place is selling everything, husband died 2 years ago. Here are a couple of pics until I get it unloaded later today. I will post in the Logan forum also.

IMG_1872.jpg IMG_1873.jpg
 
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#19
What ever you paid for that lathe, it's worth it to get the collet adapter and nose piece! Nice find. Ken
 

76kcfdcapt

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#20
I finally found the right motor, GE Triclad 3hp 3 phase . Bought it as a used motor but it has never been run, still has the instructions in the connection box.
 
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#21
I finally found the right motor, GE Triclad 3hp 3 phase . Bought it as a used motor but it has never been run, still has the instructions in the connection box.
That's the exact same 3 HP motor I have on my 13" Sheldon-Sebastian lathe. Still going strong for 60 years of use!
 
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