Machining an Acme Thread (Training Video)

In college, one of my lessons was for me to make a male and a female acme 2 TPI, I used a lathe dog to index it to a 4 jaw chuck and made a double start 4 TPI. My instructor was so impressed, he gathered the whole class and showed it off. It now resides in the display case at the college.

That is a great looking old lathe, I have cut a million acme threads and this is fun to watch but taking that long would never do in a modern shop. Love to have a lathe like that in good shape.

A 13 inch South Bend lathe is a beautiful machine!

I'm on the same Hendey! I love this lathe and needed to know how to do an acme thread. can't wait to learn more

A center height line on the tail stock.. what a great idea

Это станки шедевры и мечта миллионов сегодняшних мужчин с руками не из жопы

If the thread gauge nut is large enough to fit over the center of the tail stock, place it on there before the work piece and it will be ready to check the threads without removing the part from the lathe

Whenever I cut threads I turn the cutter upside down and run the lath in reverse thus avoiding the possibility of crashing into the spindle.

On the last cut I would have picked up the speed some, maybe get a better finish providing you don't go into the chatter range or better get above it. But what do I know.? Only been doing it 40 years. Seen a lot of changes with carbides and formed cutters and increased speeds and surface finishes and CNC which are way faster reaction time than any human. I know of a fellow who cuts threads at the same speed you would normally turn material, 100 sfpm or above. His hand eye coordination and reaction time is amazing but he has been replaced by CNC and formed carbides that take you into 600 sfpm land. That said, I wish I had a solid machine such as demonstrated. There is no replacement for a brutally and beautiful heavy machine for taking heavy cuts and precision.

The lathe is a Monarch. I don't know the model. I can identify it as a Monarch by the looking at the compound feed. Everybody noticed that he wasn't wearing safety glasses but also look at him using the file. He should be filing left handed when filing something on a lathe. When you file right handed on a lathe you will be wrapping your left arm around a spinning chuck. It's not much of a safety issue when using a small chuck or collets, but what are you going to do when using a 28 inch chuck or large face plate. If you are right handed you must train yourself to do it left handed on a lathe.

i love my hendey lathe I'm a very proud owner

i have wanted to cut an acme thread for years and never have but i will now thanks

i never turned a hollow part, but I thought it was called a Mandrel that you slid the part over - same thing as arbor, I guess.

We watched this same film in trade school 1989

Hendy 12" lathe he was a vintage machinist

I also a lathe machine work🙋‍♂️

Not a machinist here -- I was wondering how the operator got that turned part off after pressing it into another part so tightly with an arbor press?  Anyone know?

" Before running the lathe, it should be cleaned and oiled", Too bad People don't do that stuff anymore. I think these hendey lathes, rivaled monarch lathes at this point in history. Both very nice machine's.

Hendey 12x30

It seems that part of the skills then was not to get injured when working. This reminds me of a mechanical engineer who always wear white coveralls when working or inspecting work in the engine room of ships under repair in a dock yard and never once saw his clothes soiled