Hercus 260 (south Bend Gs26-075)

Boris Ludwig

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Here is the reason for learning the threading...

I got myself a quick change tool holder/post but my lathe doesn't use a "T" nut so I had to make a post bolt to fit the compound slide. The thread is 12 TPI but the nut for the tool post is a metric 2 mm pitch. So I determined to learn what I needed to make one.

20171030_083521.jpg

What made it complicated for a novice like me was that I had to learn and execute both a metric and a whitworth thread.

One last thing I need to do is get some spanner flats milled into it so I can tighten it down in the compound.
But I got it done. Its a very humble achievement but I learnt a lot about how to use this lathe and about general turning too.

20171029_114445.jpg
 
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Bob Korves

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Here is the reason for learning the threading...

I got myself a quick change tool holder/post but my lathe doesn't use a "T" nut so I had to make a post bolt to fit the compound slide. The thread is 12 TPI but the nut for the tool post is a metric 2 mm pitch. So I determined to learn what I needed to make one.

View attachment 245611

What made it complicated for a novice like me was that I had to learn and execute both a metric and a whitworth thread.

One last thing I need to do is get some spanner flats milled into it so I can tighten it down in the compound.
But I got it done. Its a very humble achievement but I learnt a lot about how to use this lathe and about general turning too.

View attachment 245612
Very nice job, Ludwig!
 

Boris Ludwig

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Thanks Bob.

My friends use my first given name, Boris.
 
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Boris Ludwig

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If the "chips" are long like curly hair rather than short "C's" or they are brown or dark blue in colour does that indicate something is incorrectly adjusted like speed or feed rate?



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Boris Ludwig

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I had a bit of success - 5C collets an adapter - the blokes in the machine section made a draw tube with a hand wheel to fit.

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20171212_215014_zpsxmozib4t.jpg
 

Boris Ludwig

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Hi Boris- How long have you owned your Hercus? How plentiful are they down there?
Mark S.
Since November last year.

They were relatively common, when I was a high school student in the 70's every high school had at least 6 of them in the metalwork room. Almost every technical college had them as a teaching tool.

Forty years later they are still prized as well made machines. I work at a large technical college in Sydney and in the machining section they have 4. Of course, they have many lathes, all sorts of bigger lathes and CNC lathes etc. too but they still have the Hercus 260.
 

Boris Ludwig

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Find one first because you won't find one just like that.
 

Boris Ludwig

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I was able to get my hands on a genuine Hercus taper turning attachment for my lathe. It still had lots of wax on it so I believe it has not been used.
Cleaned all the wax off oiled it well and put it into place on the lathe to see how it all goes together since there is very little literature and images.

Anyway for the record I decided to put a few photos in this thread.

20180727_115456.jpg 20180727_115507.jpg
 
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Dave Paine

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Nice job replacing the belt.

If your lathe is a rebadged Southbend, the taper is likely not a Morse Taper. You will need to make a custom taper based on measuring the taper angle. A pain. I do not know why SB did the proprietary taper.

If you want to purchase an adapter, this US shop sells them.

Miller Fabrication
 

Boris Ludwig

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Hi Boris, If your research for a taper turning attachment found another one I would be very interested in getting one for a project I have in mind.Great score for your lathe.
I haven't read back through this thread but did you ever work out what Taper your headstock has?

Yes, I did finally figure out the spindle taper. It's. .602 per foot. So same slope as a MT3 but larger. See post #33 and subsequent.
 

Boris Ludwig

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Nice job replacing the belt.

If your lathe is a rebadged Southbend, the taper is likely not a Morse Taper. You will need to make a custom taper based on measuring the taper angle. A pain. I do not know why SB did the proprietary taper.

If you want to purchase an adapter, this US shop sells them.

Miller Fabrication
Hi Dave,
Thanks for the link.

The belt exercise was really my first maintrnce project on a lathe and although it took some time to figure it all out it turned out great. Haven't looked back since.
 

Boris Ludwig

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Got myself a faceplate which I think I could use with a dog to turn between centres.

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