Evolv-ing Thread

TrollDragon

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I have a bench metal lathe probably manufactured in the late 30's or early 40's (it's on its 4th electric motor I think) that you could stop by and use. I have no vertical mill though. :( Although there are tricks you can do with a lathe that you can do some vertical milling stuff with it. ;)
Thanks for the very generous offer. :toast:

Why are you not making BB bridges and keys with it? ;)
 

BillW50

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Thanks for the very generous offer. :toast:
Should I fire up the grill next Saturday? :D :toast:
Why are you not making BB bridges and keys with it? ;)
Umm... I have to change gear wheels for cutting Imperial threads (no neat selectable gearbox). And for metric, I guess I would need a whole set of gears which probably has to be manufactured from scratch. I looked for a model number, but this is all I found.

South Bend Lathe 1.jpg
 

SlickWilly

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There is a substantial ledge in there and it's stainless steel.

I've made replacement 510 pins by spinning a 3mm pan head SS screw in the hand drill before, using a file to reduce the diameter of the head. Even managed to put a hole through one for wire trapping to fix the broken pin on my Origin MK2.

What I wouldn't give for a small metal lathe and vertical mill. :2cool:

View attachment 831355

"There is a substantial ledge in there and it's stainless steel."

Ah, I see what you mean now.

"What I wouldn't give for a small metal lathe and vertical mill."
You and me too brother!

I inherited my Father's drive for tinkering, Dad gave me kids tools when I was in 1st grade. I loved figuring out how stuff worked and nothing was safe in the house, I'd take stuff apart just to see what was inside. Back then Dad was a machinist and of course I wanted to follow in his foot steps, I went to two schools, the first had an actual machine shop in the school, the second offered Machine Shop as vocational classes, I ate that stuff up! I was second in my class in the vocational classes, the teacher told me I was a shoe in to get a job in a machine shop when I graduated in the next year. After graduation I applied at all the machine shops within driving distance but I had a chip on my shoulder thinking I was above starting out sweeping floors and cleaning metal shavings, I took it as an insult rather than seeing the opportunities and refused, rudely.... After a year of looking for work while still living at home I took a job washing and detailing cars at a auto dealership, boy I regretted being strong headed and burning bridges at those machine shops, humble pie... I made my way from washing cars to changing oil and tires, from there I put my nose to the grindstone watching and learning everything I could. That's how I ended up being a mechanic most of my life and not a machinist, but I've always longed to get my hands on a mill and lathe, just to expensive new for any that are worth while and I've never been lucky enough to find a deal on used smaller machines. :(
 

SlickWilly

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Should I fire up the grill next Saturday? :D :toast:

Umm... I have to change gear wheels for cutting Imperial threads (no neat selectable gearbox). And for metric, I guess I would need a whole set of gears which probably has to be manufactured from scratch. I looked for a model number, but this is all I found.

View attachment 831373

You're a lucky man! If you ever decide to part with it.... I bet with some digging you could find manuals for that machine and likely forums with folks who could tell you all you need to know, maybe even steer you toward gears for your lathe. There is a fellow on YouTube who I follow, love his videos, you probably know of him already, there's a bunch of others too. I bet of you message him he could help you out. Here's his main page on YT mrpete222
 

cigatron

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Should I fire up the grill next Saturday? :D :toast:

Umm... I have to change gear wheels for cutting Imperial threads (no neat selectable gearbox). And for metric, I guess I would need a whole set of gears which probably has to be manufactured from scratch. I looked for a model number, but this is all I found.

View attachment 831373

SAE to metric equivalents are close enough to thread in most times . The only problem I see with that lathe unit is reproducing a usable .5mm thread pitch. .75mm and 1.0mm thread pitches should work fine on that lathe using the closest SAE equivalents.

When trying to make a .5mm thread pitch work you can reduce the minor thread diameter about .004" and it should thread right in......up to about 9 threads, then it will begin to bind. Been there.

Good luck.
 

BillW50

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I inherited my Father's drive for tinkering, Dad gave me kids tools when I was in 1st grade. I loved figuring out how stuff worked and nothing was safe in the house, I'd take stuff apart just to see what was inside. Back then Dad was a machinist and of course I wanted to follow in his foot steps, I went to two schools, the first had an actual machine shop in the school, the second offered Machine Shop as vocational classes, I ate that stuff up! I was second in my class in the vocational classes, the teacher told me I was a shoe in to get a job in a machine shop when I graduated in the next year. After graduation I applied at all the machine shops within driving distance but I had a chip on my shoulder thinking I was above starting out sweeping floors and cleaning metal shavings, I took it as an insult rather than seeing the opportunities and refused, rudely.... After a year of looking for work while still living at home I took a job washing and detailing cars at a auto dealership, boy I regretted being strong headed and burning bridges at those machine shops, humble pie... I made my way from washing cars to changing oil and tires, from there I put my nose to the grindstone watching and learning everything I could. That's how I ended up being a mechanic most of my life and not a machinist, but I've always longed to get my hands on a mill and lathe, just to expensive new for any that are worth while and I've never been lucky enough to find a deal on used smaller machines. :(
Gosh... I just love your stories Willy. :D I too went to a vocational high school and I signed up for every course they had: auto, machine, electronics, and drafting. Well they had sheet metal shop too, but I didn't have enough time for that one. I ended up with a career in electronics. While electronics was my favorite, I could have taken off in any of them really. Well not drafting, I didn't care that much for drafting. ;)
 

Alexander Mundy

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I went electronics due to a vo tech teacher that made us use slide rules. Long story short it made me have an epiphany how Lx, Cx, Rx, Fx interacted vector wise. Before that epiphany I was rote memorizing formulas, after I could create the formulas.
 

BillW50

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You're a lucky man! If you ever decide to part with it.... I bet with some digging you could find manuals for that machine and likely forums with folks who could tell you all you need to know, maybe even steer you toward gears for your lathe.
It was my uncle Bill's lathe. He was a machinists in Chicago. When he passed away, my aunt sold it to my dad. Since I knew how to use a lathe from school, I had to teach my dad how to use it. So he had it until he too passed away. Now I have it in my shop.

When I was taking machine shop in high school. The first two things I made was a bottle opener using nothing but a hacksaw, files, and a stock rectangle piece of 3/8 inch steel that I shaped to look like a parrot. :lol: I have no idea what happened to it. I probably haven't seen it in 50 years.

My first lathe project was to make a brass hammer. Strangely I know exactly where that one is at. It's sitting in the top drawer of my work bench. ;) I just pulled it out to take a picture of it. Gosh, what a rush job! I only had a short time available on the lathe and I had to make the best of it. Both ends are threaded and the handle has rings of plexiglass sandwiched together. They were sheets that I had to cut and drill. I was so scared that I would crack one, but it never happened. Plexiglass sure cuts like butter on a lathe.
EIQLJ7Z.gif


Brass Hammer.jpg


I see someone else got some paint on it and it needs a good cleaning. And it sure has seen lots of use during the passed 50 years. Probably my worst looking lathe job ever! But that isn't what is important, it was my first! :D
There is a fellow on YouTube who I follow, love his videos, you probably know of him already, there's a bunch of others too. I bet of you message him he could help you out. Here's his main page on YT mrpete222
Nope, I never watched them before. I'm going to be busy now. Many thanks Willy. :)
 

BillW50

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SAE to metric equivalents are close enough to thread in most times . The only problem I see with that lathe unit is reproducing a usable .5mm thread pitch. .75mm and 1.0mm thread pitches should work fine on that lathe using the closest SAE equivalents.

When trying to make a .5mm thread pitch work you can reduce the minor thread diameter about .004" and it should thread right in......up to about 9 threads, then it will begin to bind. Been there.

Good luck.
Ah thanks. But isn't the thread pitch totally dependent on the tool bit? In school, we had blank tool bits and we had to grind them to the shape that you wanted. I guess you can purchase them precut too. But school wanted us to learn how to grind our own. Grind for a few seconds and then dip in water. Then repeat for what seems like 2000 more times. :cry:
 

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