Jimmy Diresta Band Saw Restoration, Pt 10: Single Point Cutting Left Hand Threads on the Metal Lathe
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- เผยแพร่เมื่อ 1 ส.ค. 2024
- Jimmy Diresta Band Saw Restoration, Part 10: Single Point Cutting Left Hand Threads on the Metal Lathe
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I've been running a mill and a lathe for about 40 years and can do setups in my sleep (not really), but explaining what and how to do it like Mr. Rucker can is an art unto itself. I know I couldn't do it, kudos to a good teacher!
Great threading sequence. Most just show the cut when newcomers really need to see the coordinated lever action. Nice job.
Thanks for showing all the knobs and levers at the beginning. Not all of us know how all these levers and knobs work.
that 0 stop is a great feature, i wish my machine had one for sure
Thanks for the lesson Keith!
Happy New Year to you and your family
A lot of video effort in this one - different camera angles and good explanations of what you were doing :)
Double Boost does left hand threading without even trying to.😁
I saw that funny video. He cut LH internal threads in a big aluminum shaft two different ways thinking they were RH.
Thanks for the tutorial Keith!
THAT Monarch lathe is a Sweet Heart.
Even though I don't own a metal lathe or have the knowledge how to set them up, I love watching your work Keith.
I recently watched a video you made of doing a left handed thread at the museum for a blacksmith drill of sorts
Thanks Keith for the left hand threading lesson, excellent job as always. I really enjoyed all the different camera angles, that really helps in understanding all the steps and what you’re actually doing with your hands during those steps. This video would be a great primer for anyone who wants to learn cutting threads, either left hand or right hand threads. Thanks for leaving in the part where your halfnut doesn’t engage perfectly, I was just wondering what you’d do if it didn’t engage right. So thanks for leaving that in. Wishing you and yours and everyone else a Happy New Years!
Engaging video! Happy New Year!
Thanks for sharing 🇨🇦
Great job explaining the process, thanks
HAPPY NEW YEAR, PET OR TELL EVERYBODY HELLO, SEE YOU ALL NEXT YEAR...
Great explanation of the lathe settings. I'd like to see more of that type of thing on other machines. Thank you.
Great video as always, thanks JB San Diego
Thanks Keith!
That was very helpful. I will try it for fun.
Pitch dia. for 1 1/4-10 2a fit is 1.184max to1.177min rounded up which i do to be safe in tolerance. Since you are making the nut and it is not standard going to the other shaft and getting your measurement works too. Have to agree with others that the nut should have come first. To each their own and it will workout either way.
Always like threading on the lathe.Jimmy should have a great saw when done. HappyNewYear!
Excellent job on this overview. The explanations and camera angles are fantastic!!!
Much the best tutorial on thread-cutting I've seen yet. The thread dial was the missing link for me personally - no-one seems to cover this. Simple and obvious when you know how, but baffling for a beginner to hear people refer to a 'dial' and a 'number' without ever putting it in context or showing you what they're talking about. I now feel confident enough to actually try it myself - thank you!
I was confused by that as well. Finally understand now.
Check Abom79 @ th-cam.com/users/Abom79 he shows how this is done.
@@philipmackin1025 Thank you, I will.
Happy new year! I find this channel to be inspiering and interesting even though I am a wood worker by trade. Good craftsmanship is universal.
Someone would benefit from being your - apprentice.
When making a non-standard thread I always make the nut first. It is a lot easier to test the fit using the nut than trying to test the internal thread using the shaft. Also using standard thread with an easily obtainable nut would make it easier for later repairs if necessary. But I must add this was a fantastic tutorial on thread cutting.
In his last video, Keith said he didn't have the correct stock for the nut.
I agree. He should have made the nut first, especially since it’s non standard left hand to be fitted to the long heavy shaft. It will be interesting to see how he does that. I’m guessing he’ll need to machine a short shaft with L.H. threads to use as a thread gage.
Brilliant. I'm putting that tip in the mental toolbox. Thank you.
...that's the TRUTH-!!!
@@ellieprice363 Yes, a short thread gage for the nut. Now you can make a spec nut. But the shaft will be in spec too because it gets measured directly. So no need for the nut except for the satisfaction of screwing it on. Unless you want a nut that has minimum clearance (like a thou or two instead of .003/.007 probably, just guessing). A tight custom fit is nice.
Thanks for taking the time from your busy life to share this knowledge with the rest of us. Oh where were you when I was taking the first year of college machine shop. I've learned so much more from you, Keith F, Adam, Brian, Dave R, at old time steam, and Curtis with Cutting Edge Machinery in Australia, and his dog Homey, and so many more.
Myself being completely ignorant on machining I appreciate seeing how it is done, thank you
Thanks for Sharing...
Thank you for sharing. Thank you for showing the step by step on cutting left-hand threads, watched and as always enjoyed it. Keep up your dedication to your TH-cam channel have learned and enjoyed your channel for many years. Gary👍
Keith, this has been an awesome series of lessons! Greatly appreciated. Thanks for being a great instructor!
I bought an Asian made mill/drill, and I'm patiently waiting for it's arrival. I'll be a beginner at this, so I'll learn by doing.
Great place to start. That was my first machine too.
Personally I would always make a proper radius undercut and not a sharp transition, for fatigue reasons.
Nice job.. I bought a 9"A benctop and I love it! I am also working on decruding an early 40's 16" tool room South Bend. I can't wait to get it all cleaned up and back in service.
Thank You !
I may not ever do this operation, I'm over 50 years of age, but I appreciate all that talk/instruction
Happy new year from Canada
I was taught to do the undercut first leaving it 5 thou over core/root diameter. Then you can keep cutting until you just witness onto the undercut then do your measurements and final fine cuts. Afterward go back and take the undercut a little under core/root.
Great lesson in threading Keith, when this is project is completed and time goes by (40-50 years) and were not around to warn the next person that takes this machine apart,...would it be appropriate to stamp LH on the end of the shaft?
Couldnt agree more. Had that been done originally it would have saved Keith a bunch of time and work.
Left handed nuts usually have a groove cut in them do indicate that, just look at your oxy set, fuel gas is left handed.
I have seen mechanics tricked by left handed threads on wheel nuts on left side of trucks.
Definitely easier for everyone to label it. However I always try to check the angle of the threads when dissembling rotating parts if there is one thread you can see. Down to left or right. Has saved me before,lol.
@@dennisleadbetter7721 It would be different if all vehicles were the same. It doesn't help that they're not !
@@jhueth3969 If all nuts were undone by engineers, not such a problem. If turning a nut doesn't loosen it but tightens it, it's a sure sign of a left hand thread. You just need a sensitive enough feel to detect that.
A master class in left hand threading!
Great video!
This whole series has been fascinating so far. Hope to see another major restoration like this soon.
Thank you for your wonderful instruction! Happy New Year!
Keith, I think that I agree with several other commenters about marking the end of this thread as "LH" or similar. However, I _really_ wish that you had modified that cutoff tool to have had (honed) radii to avoid leaving stress risers in the new shaft for future owners to deal with. I'm certain that such a tool would come in handy in future jobs in your shop!
So much fun...
Happy New Year, Everyone!
Quite a nice introduction. The debate about 30deg, 29.6deg, or straight in goes on and on. The best argument I have heard for 29.5 over 30 is that it insures both thread flanks are smooth in a world with inevitable errors in the tool angle, compound angle, tool setup, and so on. A few minutes here and there should be less than the 0.5 degree. The internal stop for threading is so nice. I miss my old lathe that had it (Pacemaker), so I made a drawscrew type for my current lathe (better than the clamp type that grabs the cross slide ways, in my opinion)
It doesn't go on in the machine shops I have worked in, never seen anyone angle the compound to cut a thread besides on TH-cam, at trade school the teacher told us about it but never did it. You can work out the ratio to move the compound to keep it cutting on one side or after a few hundred threads you just wing it like every machinist I know does. The reasons I don't angle the compound is that you can't just work out the depth and go straight to it, for large threads you can't clean up both sides and if you're using the compound for widths or lengths you would have to move the compound every job. For a hobbyist it isn't even something to argue about, the end result is the only thing that matters, not efficiency, so whatever works for you.
Thank you Keith , good teacher!
Great teaching video!
Gave instructions for the person who's never cut a thread before, but threw in a couple of nuggets for the more experienced people!
Always love to watch the machining videos.
Happy New Year!
Love your content Keith.
Much appreciated lesson, great camera angles! No room for errors, need to bring your A game on this task
My Xmax present. Great video.
Great video. It brought me back to the mid 1980’s when I used to have an old 21” Monarch. The most stressful work that I did on that lathe was doing 3-1/2 inch internal Acme thread at 4 threads per inch. You really have to watch carefully then disengage the screw, and move the carriage forward a couple of turns simultaneously. All very nerve racking at the speed needed to get good results in aluminum. I don’t miss that much but enjoy seeing you working and explaining to us how and why you are doing it. Thanks.
There is no stress if you cut it "backwards" >> so you are cutting away from the chuck.
great detail .thanks
I really appreciate how good of a problem solver Keith is. I feel like I learn as much about metal turning as I do how to think through out a challenge.
always a pleasure to watch you working
Nicely explained and demonstrated.
Great explanation. Thanks for posting this.
Thank you for teaching
Great tutorial! Thanks, Keith!
Keith
That was very helpful. I will try it for fun.
The image quality and lighting in the video is excellent
Happy New Year.
Frank
Thank you for the extra detail.
Pretty work Keith.
Thanks for explaining the correct way to cut left hand threads.
I love the color of that lathe, classic!
Excellent teaching video Keith!!
Great video. Happy & Healthy New Year Keith.
Loved the detailed sequence for thread cutting.
Keith, this is one of my favorite videos of yours! Threading thoroughly explained with great camera work. Have a great 2022. Best wishes to you and all your family.
Nice work Keith.
In high school we feed on the cross side only.
The problem with that as you said you're cutting on both sides of the tool and you have twice as much surface touching.
It doesn't cut as smooth and your much more likely to chatter. It wasn't till I was out of school I learned the method you used. My machiest hand book has a chart that shows both the cross feed number and for the compound method. The common thread pitch gage has the double depth number for the cross feed depth. There is a formula for converting that number for the compound method. I like to use the nut that is going to be used but you didn't have that. Another way to check is by using thread wires but are tricky to hold properly. Your thread is the way to go.
Very nice job the way.
In high school all our lathes had quick change gear boxes so I got spoiled from the start.
Change gears will do just as good a job but the time get them setup . And you have a stack of gears to put away somewhere.
Very instructive. Nicely done. Thanks for sharing.
Excellent instructions Keith, great video, keep'um coming..
You can put slight pressure on the threading lever just before the number you want to engage on and the carriage will slide into engagement of the feed screw. No need to worry about missing a number or slamming into engagement. Thanks for the vid!
Well done, well explained, ty.
Thanks for the details, Keith. I'm new at learning to use a metal lathe (a cheap, little-bitty hobbyist bench lathe, but a lathe none the less) and this helps me understand it tremendously. Keep up the good work.
Always enjoy your videos Keith. Thank you, and all the best for 2022!
Thanks for sharing and Happy New Year to you and your family!
thank you Keith. really great to see that Rucker-restored Model K in action
Appreciated the detailed explanation on how to setup the lathe.
Happy New Year to the Rucker family! Thanks for the awesome videos!👍
happy new year , looking forward to a bunch of new stuff !!!!! glad you are feeling better !!!!!!!!!!!!!!
I really appreciate the extra time and explanation while you created these threads Keith. Thank you.
Excellent video! Your explanation and visuals are spot on. Thanks Keith!
Thank you for taking out some of the mystery of single-point left threading! I love that lathe!
Thanks Keith for another very informative video. Hope you had a great Christmas, and from mine to yours and all your watchers and subscribers, a very, happy, safe and prosperous 2022. J.C Liverpool, UK
Love the detail on all the steps of threading. very helpful. Thank you and Happy New Year!
Happy new year
Keith, thanks for another great video!! It good to see a threading lesson simple but right to the point.
Great job of threading. I think I would have made the nut first though. Thanks for the video.
Excellent explanation and camera work
A really good instructive video with all the different camera standpoints. Thanks for the great work!
I work in a small machine shop where I have to make unconventional threads on a regular basis.
I usually start with a male reference thread. Then I make the female thread first using the reference thread as a guide. Then it's easy to reproduce the second male thread and be assured that it will fit without testing. The reference plugs, I hesitate to use the word master because of the inspector, are labeled by outside diameter, number of threads per inch and the pitch diameter to put away future reference. There is nothing wrong with your method. I just find it when you make a lot of oddball threads it's more efficient.
Fascinating process. Thank you for sharing. Have a great New Year and stay safe.
Another interesting and informative production. Happy new year everyone from Switzerland.
Kool watchin ya work the controls on that M
I enjoy watching your videos, I have a watchmakers lathe in the workshop I use very very occasionally for making or cleaning pivots, but its good to see how the big machines work, much the same, just on a HUGE scale. Many thanks.
Well explained video on left hand thread cutting. Thanks for the video.