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Heyligenstaedt lathe.

It would help to know the diameter of each - S, B, and C
What is the distance between A and C? (may not matter, but good to know)

I assume the bolts/studs/dowels in A and C are still in place?

The bores of A and C look smooth - can't see any female threads through A or C.

B does not appear threaded through, looking from the bottom. Threads could be smaller than the bottom OD. B could have a shoulder and splines, and be pressed in from the bottom. The male portion of B looks like it might be threaded. It needs to be cleaned and magnified.

It looks like the toolpost body is spinning freely on the compound. I assume B does not move when you rotate the toolpost?

tp2-note.jpg

tp3-note.jpg

tp1-crop.jpg
 
The area to check for threads or splines is on the bottom around the stud, in the picture on the right in post #15. There is dirt in there. Once cleaned it should be possible to see detail.
Ιf I remember well,the central pin,is threaded to the base.But,I dont know how it can be hold that pin,all the structure,because if I can remove the pin,is just a pin..How it can hold all the toolpost?In all the gizmos I found in the stud,is the only thing does it not move.All the others do it.
 
It would help to know the diameter of each - S, B, and C
What is the distance between A and C? (may not matter, but good to know)

I assume the bolts/studs/dowels in A and C are still in place?

The bores of A and C look smooth - can't see any female threads through A or C.

B does not appear threaded through, looking from the bottom. Threads could be smaller than the bottom OD. B could have a shoulder and splines, and be pressed in from the bottom. The male portion of B looks like it might be threaded. It needs to be cleaned and magnified.

It looks like the toolpost body is spinning freely on the compound. I assume B does not move when you rotate the toolpost?

View attachment 394452

View attachment 394453

View attachment 394454
Yes,its all that the way you saying.But upper and down the "A" spot,the central pin,there are other 2 pins.As say them "D" and "E".lets see the facts.The pin "B"is steady.Not move.The spots "A" "C" "D" "E" are not move either.The upper piece of toolpost,moves freely around itself.The inside "ratchet nut" moves ,as well.What you suppose to try?You do a nice presentation with the pics here!
 
Yes,its all that the way you saying.But upper and down the "A" spot,the central pin(also the "S"its the same part),there are other 2 pins.As say them "D" and "E".lets see the facts.The pin "B"is steady.Not move.The spots "A" "C" "D" "E" are not move either.The upper piece of toolpost,moves freely around itself.The inside "ratchet nut" moves ,as well.What you suppose to try?You do a nice presentation with the pics here!
 
Yes,its all that the way you saying.But upper and down the "A" spot,the central pin,there are other 2 pins.As say them "D" and "E".lets see the facts.The pin "B"is steady.Not move.The spots "A" "C" "D" "E" are not move either.The upper piece of toolpost,moves freely around itself.The inside "ratchet nut" moves ,as well.What you suppose to try?You do a nice presentation with the pics here!
 
I bet those are pull pins. Screw your slide hammer into hose threaded holes on top and see if they pull out.

If not that, maybe taper pins knocked out from the bottom?

My last idea is that the holes on top are to be used as jack screws, to press the two pieces apart.

If I only I was there to put a 2nd set of eyes on it. :-) I know how you feel... hate to find something you can't figure out how to get apart. Especially while trying not to break anything.
Yes,thats the right feeling on this moment...But I hope,all together,to find the solution in that problem!Its just a toolpost I said...It be disassembly in a second...I thought..I am still laughing....
 
Are "pins" D and E smaller in diameter than A and C? At first I thought it was lens distortion. But if they are different sizes than that is probably significant.

Can you measure the diameter of D and S (the top of the stud )?
 
Are "pins" D and E smaller in diameter than A and C? At first I thought it was lens distortion. But if they are different sizes than that is probably significant.

Can you measure the diameter of D and S (the top of the stud )?
Ιn a few days I will go to the shop,in order to get out as a winner....If I dont,I am take some measures to intedificate what do there,all that pins...I hope to remove the central shaft,maybe thats move is just enough get free the toolpost.
 
We have a winner!At least,with help of a friend,will find the problem.One of the safety pins,it been stuck and it keep the system tightly locked.After we remove a hidden screw,the toolpost it come easily out.thank you all of you for your answers!
 
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After 69 messages on this thing, we need to see pictures of the pin.
That sounds fair..The upper side of the pin,it has been stuck together,with the interior rachet of the tool post,and was hindering the ratchet to go up or down.It only left to be move left or right.
 

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Looks like you used lots of oil to get things apart. No need for EDTA soak to remove rust in your shop.
Bill D.
Now,I am still cleaning parts.The lathe is a new acquisition and its on the restore phase.The previus owner,dont care about the lathe...too shame,but I wiil gonna to fix it,its a bet of myself,against every other "machinist specialist".I have to do a lot of work,a lot of restoration and reconstraction,but that old lathe,is not be a scrap,not in my watch,not in my hands.
 
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Hello again! I am on the pick of reconstraction at my lathe and I want to make some new bushngs.I have heard some types of bronze alloys,but still I am not convised about that materials.The bushings that I want to make,are on the cariage and the rods holder,in the end of the table of the lathe.Do we have any bronze materials suggestions?
 
Like others have suggested, jam nuts on the stud or press it out might be something to try. It is possible that the toolpost has worn a shoulder into the stud (ridge reaming cylinders in gas engines comes to mind), rotating around the same place for decades. So, while that nut would have freed the toolpopost a long time ago, it no longer does. When you determine the proper way to remove the stud, GENTLY heating the whole assembly wouldn't be bad idea, if it gives you trouble.
 








 
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