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  #71  
Old 06-08-2021, 05:11 PM
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So about 2 weeks ago, coworkers main lathe stop moving the cross slide. We started tearing it down before boss came over. Found the main acme screw rusted/ wore down enough that the threaded nut blocks just slipped over it in the center. Lathe looks really old, but is actually made in 1978, I think in Romania. Manual and parts breakdown is non existent. Have a parts catalog that shows some gears and there specs, but that’s it. So it was make notes as we go, and reverse engineer the parts needed. Boss started talking about a new replacement lathe, and that is coming, we just want to delay it as long as possible. Especially with these times we are in. Who knows what the next year is going to bring.

Anyhow, the boss did order me a piece of acme rod and cast iron threaded blocks, so I did not have to make the thread. Biggest challenge here was the original rod was 25 mm, and we could only get 1” rod. I figured I could turn the .060” off the od, and the nuts would still be fine. Especially after seeing how bad the old rod was and was still working.

I managed to get everything machined out, and put back together last week. Other machinist was very happy, cause now he could stop using the spare lathe that I used for my first year.

Now he has to learn some new tolerances with the tighter thread. Unfortunately, we are learning that sometimes it is a bad thing to clean up something that has not been taken care of in a while. Cleaned the gibs pretty well, and now it is hard to get it tightened up so it runs smooth. When we get the okay out of it in the middle, it’s really tough to get it all the way back. It must have had some dirt packing in the worn areas before and taking up the space.

We drained and flushed the apron oil. It had a lot of water/ coolant mixed into it, and since then, been starting to have some feed issues. I’m afraid sometime soon, I am going to have to tackle that part. I feel that there are a lot of worn bushings, shafts, gears in there. It takes two hands to move the carriage hand wheel.

And since parts are obsolete, it might not be to well, but I’m willing to try to make what we need.Click image for larger version

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  #72  
Old 06-08-2021, 06:09 PM
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Quote:
Originally Posted by toprecycler View Post
So about 2 weeks ago, coworkers main lathe stop moving the cross slide. We started tearing it down before boss came over. Found the main acme screw rusted/ wore down enough that the threaded nut blocks just slipped over it in the center. Lathe looks really old, but is actually made in 1978, I think in Romania. Manual and parts breakdown is non existent. Have a parts catalog that shows some gears and there specs, but that’s it. So it was make notes as we go, and reverse engineer the parts needed. Boss started talking about a new replacement lathe, and that is coming, we just want to delay it as long as possible. Especially with these times we are in. Who knows what the next year is going to bring.

Anyhow, the boss did order me a piece of acme rod and cast iron threaded blocks, so I did not have to make the thread. Biggest challenge here was the original rod was 25 mm, and we could only get 1” rod. I figured I could turn the .060” off the od, and the nuts would still be fine. Especially after seeing how bad the old rod was and was still working.

I managed to get everything machined out, and put back together last week. Other machinist was very happy, cause now he could stop using the spare lathe that I used for my first year.

Now he has to learn some new tolerances with the tighter thread. Unfortunately, we are learning that sometimes it is a bad thing to clean up something that has not been taken care of in a while. Cleaned the gibs pretty well, and now it is hard to get it tightened up so it runs smooth. When we get the okay out of it in the middle, it’s really tough to get it all the way back. It must have had some dirt packing in the worn areas before and taking up the space.

We drained and flushed the apron oil. It had a lot of water/ coolant mixed into it, and since then, been starting to have some feed issues. I’m afraid sometime soon, I am going to have to tackle that part. I feel that there are a lot of worn bushings, shafts, gears in there. It takes two hands to move the carriage hand wheel.

And since parts are obsolete, it might not be to well, but I’m willing to try to make what we need.Attachment 160598
Attachment 160599
Attachment 160600
Attachment 160601


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Doing nice things to old stuff does sometimes make you do more work. Reminds me of the stories I heard way back using sawdust to make a rear end run quieter.
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  #73  
Old 06-09-2021, 09:42 AM
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Quote:
Originally Posted by milomilo View Post
Doing nice things to old stuff does sometimes make you do more work. Reminds me of the stories I heard way back using sawdust to make a rear end run quieter.

Or dumping a quart of engine oil in the fuel tank every couple gas tank refills to help lubricate rings and valves.


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  #74  
Old 02-05-2022, 08:54 PM
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Last week my son said I could use his 3D printer that he bought last year, as long as I buy my own filament. He kinda lost interest in it, when he was having problems with it, and didn’t put the time in to learn why. So I decided to try a couple things.

I figured out the main problem he was having was he didn’t calibrate the table, and he told me that. Once I did that, I was off and running.

I got an idea at work to make a card holder for the office. So for my fifth or so project, I made this holder. I had a couple mistakes in it, but it all a learning curve. The ports on top were meant to be pen holders, but I didn’t get the hole deep enough. I tried to show thread detail in the ports and grease zerks, but I didnt have the printer set fine enough. As it was, it was about 3O hours printing time.

Maybe I will make the changes and try again.

I did put in some heavy lathe chips in the base as it was printing to give it a bit of ballast.

It been fun so far. Now I’m constantly thinking about different things to make and print.Click image for larger version

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  #75  
Old 02-05-2022, 09:05 PM
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That's pretty cool. 3D printing is really interesting to me. I saw an article about 3D printed homes which is sort of crazy.
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  #76  
Old 02-05-2022, 10:48 PM
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Try making a quick change tool holder to be used for indicators. Almost no strain on the holder with an indicator. Something you can use every day.
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  #77  
Old 02-05-2022, 11:59 PM
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Quote:
Originally Posted by milomilo View Post
Try making a quick change tool holder to be used for indicators. Almost no strain on the holder with an indicator. Something you can use every day.

I’ll add it to my project list. Guess now that I got a vfd drive for my home mill, and I finally cut the compound nut flange for the Quick Change tool post for my south bend lathe, I can start with that one.


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  #78  
Old 02-06-2022, 04:59 AM
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There is a wealth of 3D printing info at this subReddit. LINK You might have to join to view. Mainly guns and parts but a lot of good setup/modding info that should apply regardless of what you are printing...
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  #79  
Old 02-06-2022, 09:43 AM
Lew Hartswick Lew Hartswick is offline
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A set of parts for an antique Transit for a friend. Had to "invent" the tool for those ball ends. The original is the dark one, my parts in front. included a few spares.
...lew...
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  #80  
Old 02-06-2022, 03:40 PM
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Quote:
Originally Posted by toprecycler View Post
Last week my son said I could use his 3D printer that he bought last year, as long as I buy my own filament.
What brand is the printer? You can buy an Ender-3 for $100 w/coupon at their retail stores. LINK Normally $200 but they WILL put you on their mailing/texting list...
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TA Arcmaster 185 w/tig/stick kit
MillerMatic 252 w/3rd gen 30A
MM140 w/o AS, w/CO2
Hobart (Miller) 625 plasma
Hobart 250ci plasma
Victor O/A (always ready, but bored)
HF 80 lunchbox w/tig
45ACP Black Talons for those stubborn jobs...
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