Internal Threading 

Nice work, I like watching your video's, I can tell you take a lot of pride in your work. I am a journeyman lineman and have a small home shop with a 12x36 lathe and a old Tree milling machine and I make things for the guys at work ( tractor parts lawnmower parts or what ever ) and I often watch video's like your to learn how to do things the right way. Thanks for taking the time to post your video's

I love watching a true professional work. You are an artist with these machines, Adam. Thank you for sharing, and letting us see the quality that these machines can accomplish in the hands of a true artisan.

I'm going to be getting my first small (7x14) lathe soon, and im watching loads of your videos to learn as much as I can. This is great stuff!

I normally cut with the compound set to the right. Its what I have done for years and has always given me good results. The text books tell you to set it to the left though. I did it that way for a while, then tried it set to the right and it always worked well. Some may say "your doing it wrong" but it works, and provides good end results. I stick to what works for me. Yes if would have chucked the rod up closer the chatter may have been minimized.

There is a round dial with numbers on the right hand side of the carriage. I forget how many #'s but I think most are like 1-8 or some are 1,A,2,B,3,C,4,D. For an even # thread such as one half 12 you can engage at 2,4,6 or 8 odds are the opposite, there is a stationary line on the apron. I hope this makes sense.

Thanks Dan. On even threads you can catch any line on the thread dial. On odd number threads you have to catch every other line, pitches with a 1/2 its only two lines 180 degrees apart, and really odd fractions like 5/8, well you better just catch the same line everytime. Hope that helps, let me know.

Wow Adam, another great video. Your threading skills are second to none, thanks for sharing.

Enjoyed watching this. I had always thought the purpose of the compound feed was so the leading edge of the 60 degree tool would take the force and make the cut (compound angled to the left for internal, etc.). A few old-timers used say that one final "clean-up" pass (like a .001 or less/same 0 on dial) using just main cross slide will kind of evenly clean/polish the final thread.

Lots of good comments and questions guys. Ill get to everyone shortly.

Hi Lenni. On the piston, I wasnt quite the required depth and new that just a spring pass wouldnt be enough, so I fed in another thou on the dial to take a little more. But it turned out just where I need it. When you do enough of this stuff, you start to get a good feel of what works and what doesnt. Also, sometimes spring passes will start to cause chatter problems.

This was a great video. I have been going back through OxTool's videos and started going back through yours. I have a little home shop and trying to learn how to do this kind of stuff. I have never turned inside threads and want to learn. This machining is tough to learn on your own. Expecially when you are an old guy with no training since high school and very little then. But I am having a ball! lol

Yes chuck, reading a dial clock to zero is easy "for me" to see the zero point then watching the digital readout. The thread pitch was 12, so I can hit any number on the dial. Even numbers makes that easy. I've always practiced setting the compound to the right side, but the "technically correct" way of doing an internal is having the compound swung to the left side. Its always worked good for me, and anyone can do it there own way.

Dude! You are an excellent instructor! Thanks for the video.

I was threading at 300 RPM, the standard for me. When I slowed down I went to 110 rpm. The first pass or two I normally take .020 on the compound, then back off with each remaining pass.

Hi atom, Great vids. you seem to love your work. I'm trying to learn also. My father in law gave me a south bend lathe and a Bridgeport mill this summer. Everything I know is from u-tube. I find it relaxing. I bought a tig welder also. Wow is that hard! But thank god for guys like you and oxtool and Keith fenner.. Keep them coming.

I rarely feed the cross slide in past my zero point when cutting 60 degree threads. Some people like doing it because they say it cleans up the entire thread. I do that sometimes when i'm "chasing" a bad thread and want to clean them up because of galling. But normal thread cutting, its not required. But like I said, you do what works best for you.

Thanks again Adam, and thanks to the higher ups for letting you film at work. We are the beneficiaries yet again! Paul

You didnt strike a nerve. I made this video because of viewer requests. All good man. Thanks Lawrence.

Good camera shots I like seeing the big stuff done It really lets you see the detail That threaded test plug you made would make a Nice paper weight for the desk Maybe a future video on who has the biggest threaded test plug

I understand already how to cut an internal thread in reverse, no explanation needed, and I would tread lightly talking about us Americans and our "fun work". Guys like myself work hard for a living to provide for my family, and I'm sure many others here can agree with me. I don't know about the machine work your speaking of, but I can tell you MY work doesn't get recycled, it goes into USE!

Slick just isn't the word. Being a amateur I cut threads with the lathe turning at about 100rpm or less - and still fret about disengaging the cut at just the right moment. At your rpm and no relief at the end of the thread, wow.

Yes I do use the thread chasing dial. When using a 4-jaw chuck, you have to indicate the part true with an indicator. I use a 1' dial indicator mounted on a Noga holder. Indicating is a must learn job for machinists. I show it a few times in some of my other videos.

Experts always make things look easy!! I think that you are rather too modest about what you do, but I think that there is rather more to this task than meets the eye. How do you know precisely when to engage the tool travel so that its always cutting exactly the same thread? Love the cheery smile at the end :-)

You made the process look alot easier than it is Adam - Thanks for the videos

Ever thought about using a Left hand thread tool and thread away from the head stock with the chuck now turning clockwise? It provides one with way more time to disengage the nuts and greatly reducing the risk a tool collision? I just learned it and it rocks.

Another good video idea Mark. I've had a fair share of left hand threading in my job shop.

Good camera angle showing you work the lathe. You can tell you have been doing this a while! Thanks for the video, Adam. Reid

Thanks Tom. Actually I've had the Ikea light for a couple years now from a past trip to Atlanta. They had both styles, one with a clip and one with a base. I went with the clip light thinking it would be a little more versatile. But I recently broke it by dropping a damn tool block in the clamp, so now its just laying there. We're going back to Senoia next weekend and my wife and sister are heading to Ikea also. I'm having her pick me up one or three more! LOL! Next one will be Doubleboost style

Outstanding Adam, ive cut threads myself and as im sure anyone else who has will appreciate the speed you smashed them out at, really good work. Ive always run a lower RPM than that you had it really going on the first pass, or perhaps the camera speed was decieving, looked faster than 300 to me. Great vid

The shot with you on the controls is very helpful.

Nice job! Adam, never knew how to cut inside thread before. Thanks for sharing your skills :)

Hey Adam you make it look so easy! never cut an internal before but I'd like to try it out . So I'm waiting to see what you got up your sleeve for Tom or what you got under that magic work bench..

Oh man throw back Thursday.

Nice job, that is on my list of to do items cut an internal thread you make it look easy.

Hi Adam, Nice video, I like the way you are so relaxed when you disengage and slide in.

Always enjoy your videos. Abom. At the beginning of the video you had a look on your face and didn't sound like you wasn't your usual happy good mood. Hopefully its all good. Thanks again for sharing your knowledge and time. GW

Hello Adam, sorry man I did not mean to strike a nerve ...but I am glad you showed this as there are newer learning hobby people who should know how to do it correctly ...good videos again sorry if said something to cause a ruckus

Great vid quick draw Adam! Thanks for sharing it. I'd be interested in seeing you cut half or full dovetail o-ring grooves. Not sure if you do those often.

Cool video! Well edited. I’ve always thought lathe threading was something between witchcraft and magic...you know...with levers, noise, oil and buttons!

Dont know what to tell you if you dont have a threading dial. Ive never done it without one. Thanks Keld!

Hey Adam, Nice threading demo. I see you got yourself one of those doubleboost lights from Ikea. Ohh I just noticed that fan you guys have at work. I think I'm feeling puny again. Best, Tom

Hey Quick Draw I would have made a big mess of the threads if I was doing it at half the speed you did. I'm impressed!

Thanks Gill! Hope some of my hands on teaching has helped you out on the Monarch 10EE!

Thx - that's exactly what I was looking for - really nice job ! You inspires me to find out to do it on my STANKO 1A616 - a old russian made monster from 1962 without any thread dial - argh !

You'll have to let me know what a dovetail o-ring groove is. I dont quite understand. But I do machine o-ring grooves often.

Good job Adam thanks for sharing !

Very nice Adam

Great video Adam. Thanks for sharing

Hi Adam. I have seen many video's by you and I really enjoy them. You take the time to show the whole process in real time which makes it very interesting. You are also explaining your thoughts which makes it I think a lot more interesting to understand where you are comming from and where you are heading to. Question: it seems a very simple question but can you show us how you determine the height of the cutter? I guess it must be dead on so that the DRO is dead on? I have never seen you adjusing the height of the Multifix so may be you can show us how you attack that. My guess is is that it ainn't that easy: nothing is very easy in the whole process of working with the lathe. Thanks!

hi Abom, I thought the compond should be turned to the left when internal threading?? Am i right? thanks so much for impressing lath work, learned much from you. Mvh sverre eriksen, Trondheim , Norway

Yesterday I cut my first internal thread, I came upstairs turned on the computer and what were you doing? An internal thread! Mine was a 28X1mm thread, a little smaller than yours! Thanks for the video! Regards, Matthew

Hi Adam..err Quick Draw Nice action, I have a couple of questions Is the reason you set the dial indicator for the Quick Draw because it is easier to catch rather than trying see the number coming on the DRO? It appeared that you did not need to look at a thread dial to start your engagement, maybe just could see it in our view? Same question below about R/L of compound, thought internal had to swing left When do you sometimes need to feed with the crossfeed near last cut instead of the compound

Nice video, you make it look very easy

I might have a couple tricks left to pull outa the bag. You'll just have to keep waiting to see. :)

Excellent!! Keep up the good work

Another good teaching video. I was wondering if you ever use left hand threads on any of your machining. Can you make left hand threaded bolts? Thanks young man for this video.

Awesome! Thanks Matthew

Nice work bro

Good Video.... After you turned the internal threads on the piston, did you turn an arbor or some sort of fixture to screw the piston on so that it would shoulder up, How was the piston OD and groove machined....?

Hey Adam! Once again nice work! On the last work piece i noticed, that you did not take a spring pass - you fed it in just a tiny bit. Is there a particular reason why you fed it in more, rather than taking a spring cut? Sorry for my bad spelling - I'm German. Keep up the good work mate! :)

Dont sound much easier to me! LOL, you'll need to machine a thread relief inside the bore of you want to cut it that way....the blind thread anyways. The lathe in the video doesnt have a cross slide stop.

LOL, I dont know. We'll just let it flow naturally. Some of the viewers have taken those videos the wrong way.

Cool video, your work looks cool too. I'm only just starting to use a lathe and screw cutting/thread cutting is something I really want to get the hang of. Thanks :)

Love your channel Adam. --Doozer

thank you for your videos

I am Proud To Be An American too Dave! I wont tolerate comments from people like him. Theres no reason to be disrespectfull on here so I blocked him from my channel.

swinging that compound the other way and feeding into the cut probably would have cured all that chatter and rough finish.

Thank you very much! :)

True professional.

I thought the compound needed to be rotated to the other side for internal threading

I'm just surprized that most do not use a thread stop, all our lathes have them, its just one more thing you dont have to worry about.

For inexperienced operators like myself part of the dial confusion is caused by experienced operators referring to "lines" on the dial without saying whether they're talking about numbered or un-numbered lines. Example; "close the half nut on any line." Does that mean any line without a number or any line with or without a number, or does it matter?

Hi Adam great video i notice your compound was swung 29.5 degrees to the right some people swing it to the left does it make any difference apart from being closer to the chuck

Well done as allways :)

Nice work, thanks for the video

Hey Adam sorry if you have already replied to the question, this comment system is confusing. - I couldn't see but are you watching a threading dial before you start feeding? You were working so fast it looked like you were just engaging the feed. Thanks for the awesome videos, slowly working my way through them all.

Damn fine work!

Thanks for this video, i have a south bend 13 and are looking to build a filter canister, thank`s

Does your material pass thru the Chuck? I. E. the work seems to be hanging out quite far...????

It was a Little hard to see IF YOU USED it - but I noticed that your lathe HAS one - I think with 8 digits - right ? I'll look for some guides to do threading on mine WITHOUT the dial - I think it can be done by reversing WITHOUT dis-engaging the half nut and then forward Again - but I try in the near future.

Hey Adam, do you have a method for determining a starting point of depth of cut on internal threads before you start checking with a gauge? Is the depth of thread same for internal as external? Say you did an equation .75/TPI. Thanks 👍

Wasn't on my cell phone. Guess you were seeing things.

nice work!

what are some indications your tool is wearing too much/time to replace tool bit? what will your threads/crests look like?

I find the thread cutting fascinating. But, not being a machinist, I can't figure out how the bar knows just where to index back to, and when to cut again. Could you explain this some day?

When you do threading, either internal or external, using the snap-tap inserts, do you use the partial profile or the full profile inserts? Thanks.

does your test rod plug actually have another test plug in it? looking at the end of the plug looks like a dip i the end that has threading to it

I see that you disengage the handle that activates the car to make the thread, and time to return you return manually, as the tool is the center of the thread again? that is, it should not return the tool removing and inverting the rotation? without disabling the handle? I am studying your videos, to learn the methods used in the US ... I will realize my dream to work one day al !!! thank you! God be with you !!!

No its a Birmingham 1660.

I want to know how do you return the carriage by your hand I can't do it with my machine could you learn me please . my machine return out magically magically when I reverse the chuck moment

question would you set the compound for external threading to 29 degrees from 90 or 29 from 0? because my professor at school gave me a big speech once because i set 29 from 0 he said that was wrong he said 29 degrees from 90 was right so i'm confused

Ah ok must be what Jet copied all the control and speed levers look very close from what i could see of them that's why i asked... Thanks for another cool video Adam !

See my response to Outsidescrewball. Thanks Tim.

beautifull work mate i need help with my disk

Thank u so much for this vedio...... Nice

Im a begenner machinist can you give me a correct computation of inch thread and metric thread deep of cut.thank you.

nice work

Question, When internal threading I see some people put their compound 30* to the left, It looks like yours is 30* to the right. As I understand the process to shouldn't matter which way its setup, as long as its actually at 30* and not 29* Does it really matter?

Isn't it economical to have a chrome shop repair that rod?

Wish my 80 year old lathes had brakes that worked that nice! Waste of time waiting for a spindle to stop.