How To Cut Threads on a Lathe

[@mikeyh6104]

Very well thought out explanation on thread cutting. Looking forward to the internal thread cutting video.

[@Threadexpress]

Thank you. It is difficult to know the best balance of content vs time. Details vs duration. Cheers, Cliff

[@GameBacardi]

Very good video. Gonna watch this few ~ ten times more later :D. Thank you

[@Threadexpress]

Comments like that keep me going. Cheers! Cliff

[@edsmachine93]

Nice video. Certainly nice work. Thanks for the thread insert tip. Thanks for sharing. Merry Christmas. 🙏

[@Threadexpress]

Thanks, let me know if you get some and they are ok too. Cheers, Cliff

[@CandidZulu]

This is how I learned to do it in gunsmithing school. And it's the method that South Bend had in "How to Run a Lathe" that we all got. I would perhaps add putting as small mark on the work piece indexed with one jaw, to be sure the piece does not slip in the jaws. Especially on small lathes. On my Sherline ( which is my favorite lathe) I can't always count on the 3-jaw independent.

[@Threadexpress]

Yes, I have had 3 jaw walking on my CNC lathe. Cheers, Cliff

[@thehobbymachinistnz]

Good instruction on threading Cliff. My old lathe never came with a threading dial so I always had to keep the half nuts engaged and reverse the lathe. I am so entrenched in that practice that I don't use the threading dial on my new lathe. Cant wait for your next video on thread express.

[@Andy-Gibb]

This is what I am looking for. Thank you for your explanation on thread cutting. I stay far from major cities and am trying to learn how to use a lathe but cannot find a class where I live so am using the net to learn. Your explanation was really helpful and the basics are appreciated. Regards from Townsville Australia

[@Threadexpress]

Hi Andy. Townsville sounds like the pace to be to escape our winter, but I guess right now it is getting a bit muggy. Good to hear your comment, I really want to contribute, and feedback like that keeps me going. Cheers, Cliff

[@Andy-Gibb]

@ H Cliff we all have our problems with the weather, we just had half a meter of rain in 24 hrs. Lucky the place is made for it so no serious flooding around us. Also humidity is at 91 % at the moment. But it's only for 3 months and them the weather is awesome the rest of the year. The middle of winter it is a cold 25 degrees everyday and if it reaches 11 degrees at night we hear about it on the news. The nights are usually about 19 degrees every night. Have a great Christmas and an awesome new year.

[@Threadexpress]

@@Andy-Gibb OK I am jealous. Here it is windy and cold and damp...apart from 3 months of summer. 🙄

[@MyMiniHomeWorkshop]

I've used those Deskar branded tips quite a bit and I find them pretty good, maybe not quite the quality of the Iscar brand we used in the factory, but for the price, pretty good. 👍

[@L98fiero]

I use the Descar inserts as well, the problem is that I haven't found full profile ANSI inserts and Deskar doesn't have the baggage of where they are made like Iscar.

[@Threadexpress]

I know, how do they do it? Cheers, Cliff

[@Nathan-vq9ch]

Pratt gauges never lie

[@Threadexpress]

Yes, I would trust them more than $10 ell cheapo gauges.... Cheers, Cliff

[@lexdavis2179]

Nice video Cliff. your toolholder is only good for lead angles up to 1.5 degrees, your thread is greater than that so to get the insert to cut cleanly you would need to tilt the insert by another degree or so with a + 1 degree shim or seat under the insert.

[@theoldstationhand]

Handy stuff to know. More surprising to me was the decent surface finish whilst running slowly with a carbide insert.

[@L98fiero]

@@theoldstationhand The problem is, I've never seen a 1° shim for the Chinese holders, you can though, buy a 10 shim insert pack from a major manufacturer for around $200

[@Threadexpress]

I think when I do the job, if I drop the tip a couple of thou below center, it may give more clearance and make enough of a difference. Cliff

[@marianodiaz461]

There are shims for higher pitch threads

[@MattysWorkshop]

Gday, thanks for sharing your tips, very useful, cheers mate

[@Threadexpress]

Good to hear. Cheers, Cliff

[@Dogfather66227]

Just an idea. . .If you are not inclined to blame your tools you can often fault the material. I had never seen inexpensive Asian full-form thread inserts. No matter how many times I have done single-point threading I always learn something when watching another craftsman doing it. Thanks for posting.

[@Threadexpress]

Yeah, that steel ! Thanks for the freedback, Cheers, Cliff

[@mce1919A4]

Thank you.

[@Threadexpress]

Cheers, Cliff

[@camillosteuss]

How to cut threads on a lathe? Step 0 - chuck the cleaned and prepared stock, set the tool up, select the ratio, make sure you ain`t licking the 3 phase wires and give `er wha` Step 1 - don`t fucking crash Step 2 - repeat step 1 until done... For metric on imperial or imperial on metric - no disengaging the halfnuts if you know what`s good for ya... Also, don`t crash... Cheers m8, best regards! Steuss

[@Threadexpress]

Step 3 - don't daydream! Cheers! Cliff

[@marianodiaz461]

Hi, I think that if you setting angle in the compound is set to 31 deg ( from the vertical , you would have an easier life.....

[@Threadexpress]

Cheers, Cliff

[@liamkelly8684]

Excellent video top class way better than abom 79

[@camillosteuss]

I`m still fucking mad about that dimwit raging over monarch not cutting a bloody acme thread properly on a thin rod when he FAILED TO PROVIDE A TRAVELLING SUPPORT! Can you imagine bitching about a majestic lathe and blaming the machine for idiocy of that caliber? Now don`t get me wrong, he ain`t a moron, i`ve seen dozens of hours of his videos and learned some things from him, what - i don`t recall, but i know that i had to have learned something, yet that was a video that i still can`t believe that i have witnessed... So yeah, given that oversight, no shit that this dude will likely bring about a better threading video when he spawned the thread cutting accessory that actually works... Designing shit like that takes some canned beans upstairs, more than is needed to just not fuck up a basic lathe operation... Cheers and all the best! Steuss

[@Threadexpress]

Thanks for taking the time to give feedback. Cheers, Cliff

[@GameBacardi]

Hi, I started school at metal work 4 month ago. We made threads with lathe, in cylinder object like you have (25mm diameter round "bolt head", M20 thread die). Biggest problem was to get bolt stick in 3 jaw chuck, it is really hard to get good grip on that round surface. Because bolt got stuck on thead die very beginning and bolt start rollin between chuck jaws. After repeating 3~4 times, thightening jaws, it started go well when thread die sink about 5mm in bolt. - Have you any good tip how to get better grip on those round object ? I tried already put sandpaper between jaw and object but it was not enough for that "practice".

[@Threadexpress]

Hi, it could be that your jaws are worn bell mouthed, have a look at my video ' fix your 3-jaw chuck' (or use a 4-jaw independent chuck). Cheers, Cliff

[@howardosborne8647]

All turned out quite nicely considering how cheap and cheerful the cost of the inserts are👌 I can see you are getting towards the upper limits of being able to measure reliably across 3 wires at 3.5 mm thread pitch with a standard 1/4"(6.35mm) micrometer spindle and anvil....time to break out the disc mics with anything of a coarser pitch.

[@Threadexpress]

Yeah. I have a disc mic, but not that big. Cheers, Cliff

[@bryanst.martin7134]

It's my understanding that rolled threads were stronger. But if a cut then rolled finish with moderate displacement could be better? Or was the rolled is better a marketing ploy?

[@L98fiero]

Only to a minor extent and no, it's not just marketing. The reason roll formed threads are stronger is because instead of cutting through the grain structure of the material the plastic deformation elongates the grains and causes them to following the contour of the thread, it also results in compressive stresses at the root of the thread, without that displacement there would be little strength increase.

[@lexdavis2179]

nice video

[@Threadexpress]

Thank you. Cliff