How To Pickup an Internal Thread for Repairs !!!
Вставка
- Опубліковано 1 лис 2019
- On an engine lathe, picking up an internal thread to re-cut it, can be frustrating. This video shows a rock solid technique for getting the job done. Take a Look !!
- Наука та технологія
Even though I don't have some of these machines, I always get some value out of these videos. Some day I'll have a small shop.
where would we be without the dial indicator? a true friend of the machinist!
Absolutely one of the most important tools in the box and one of the first things a new machinist should buy. QUALITY !!!! Buy nice or buy twice :)
The Arachnid on your whiteboard looks more like an Formicidae... Anyway, this is another of your videos that I liked very much. Your way of explaining of what and why you are doing things is something that makes me follow your channel. Being an amateur machinist with an engineering background, I learn something new by watching your videos. Regards from the Nethrlands.
Joe this is an absolutely brilliant method! That bit about putting the test indicator on the ass end of the boring bar..... That's just great!
Joe, putting the DTI on the end of the boring bar was bloody brilliant. I can see some other uses for this idea! Well done
Also, when you visit the Fang Farrier (dentist) don't be shy about putting in a request for his or her broken tools. They only throw them out, and they can be very useful to us "engineers" 😎
You can find a surprising amount of small useful tools at gun and knife shows.
Yes, great video! I laugh every time you say "unloosen"😁 I enjoy and learn something every time I watch your channel. Keep sharing the knowledge!
I learn something new every time I watch your videos.
Hi Joe - your use of the split thread for clarity purposes is a great teaching aid . Keep the great videos a coming !
thannks for taking the time to do this
I had it laying around. You should have seen me indicating it in.
Thank you for showing Joe. The say, that when you stop learning you are done, well, following you and your videos I can categorically say I will never stop learning, THANK YOU FROM MD AND HAVE A GOOD DAY.
Thanks for the comment.
A clever machinist, with lots of actual experience, willing to share his techniques. Many thanks.
thanks.
IT is over 50 years that I have operating many type of engine lathes ,Turret lathes and CNC lathe . I never new how to pick up an inside thread. Thanks a lot i really appreciate this video. Thanks Thanks again and again.
When I was an apprentice, I was shown this technique, but used the compound slide to find the centre of the groove. The indicator was looking at the compound movement. It is also the same technique for an outside thread to be picked up. The only difference was that after the lathe engagement and had checked the thread pitch , the chuck was hand turned in the direction of the thread cut. This made sure there was no backlash in the gear train. Also lock the carriage so it is stable in position.
Great post Joe as always.
I have in the past done it strictly visual by adjusting as the tool rubs in one point. Using the dial indicator to split the difference is a good idea.
Hey Joe, I love your videos. They are an example of logical problem solving and lateral thinking. Thank you for sharing your knowledge and experience.
Thanks for watching.
Last time I chased a thread was using standard Aloris holders and an insert bar. I used the compound to feel either side of the thread and noted the travel and backlash. Bounced back and forth until I found the root and backed off a few thou. Make sure you have all the backlash loaded in the correct direction on everything! Especially the half nut. Joe I like the use of the indicator. I was running more seat of the pants to chase a very large UNS optical thread.
Best teacher ever, I’m always learning new things on this channel. Big thank you Joe your the best 👍🏻
Thank you.
Awesome technique, as always, Joe! Thanks for posting. The concept of threading away from the chuck is just brilliant. So simple, why hasn’t it been done like this forever?
It's funny when you see this for the first time you go -"duh! Now I don't have to be a ninja with the half nut!" I started to use it all the time because my lathe has a metric leadscrew and no threading dial. Makes the whole stop-out-reverse-in-forward thing sooooo much easier for when you can't unlock the half nut during threading.
Actually, some turners were doing this in the first half of the last century.
Joe, I wish I saw this video yesterday as I was cutting a 1-7/8 x 6 spindle adapter. One of the threads got buggered up near my undercut and I had a seriously hard time picking the thread back up to finish the job. Now I know for next time! Thank you as always for what you do for us novices.
Fantastic technique and perfect explanation. Thank you for sharing your expertise and knowledge with us!
Glad it was helpful!
I learned how to do threading from your vids. Made my first thread yesterday but I forgot to put it in reverse and made a pristine left handed thread hahaha live and learn. You r a genius man. Thank you
Been there!
Well done, your are ready to progress to gear cutting, I made a lovely 36 1/2 tooth wheel - once !
Your instructional videos have made me a much better machinist. I am so thankful for your material and your friendly presentations. I live in a remote location in Greenland and access to your videos gives me access to the best teaching anywhere, yours! Thank you, thank you.
Thank you very much for the comment. Very much appreciated.
Another great tip Joe - I had moved the tool but had not thaught to use the indicator to find the center - so simple, Thanks
Me to: using an DTI never occurred to me either;-)
Thanks. Using the compound could easily lie to you or chip your tool. The indicator gets you much , much closer.
Another good video Joe!.... One caveat might be, for novice machinist, is to not forget that the job came in as a repair, meaning that the threads will be mashed, rolled over, gouged, etc, so their start number of .020" in this video case, needs to be sneaked up on to avoid chipping a tool on the damaged spots. Well done !
When you said 'un-loosen', I nearly wet my pants. Love it, great info as always. Kindest regards. Joe.
Good solid solution to an awkward problem. Thanks Joe, I'm still learning!
Joe Pie you are a genius! That is a technique to remember, also cutting out away from the chuck, good solid advice! Many Thanks Chris B.
Thanks. Glad it was helpful!
Thanks for sharing this idea, thankfully I have not had to pick up internal threads yet but have picked up on a number of external ones. I really like your idea for threading with the spindle in reverse and am now looking for a reverse threading bar to the one I have.
Thank you for sharing your tips and tricks, it is very much appreciated as you have some cool ways pf doing things!
Thanks. I love a good challenge and a shop is usually full of them.
You don't need a reverse handed threading tool, in fact it won't work, even with the lathe running backwards. In the same way that a LH nut will not run onto a RH thread, even if you turn it around.
Just turn the conventional RH threading tool you have upside down, or leave it right way up but at the far side of the hole, like Joe does.
Wow, you just made your own "Half Nut" LOL I always enjoy your videos. Keep up the good work!
Another great Pieczynski original. Fantastic. Thanks for sharing your wealth of knowledge.
One of my most valuable go to tools is joe pie videos ! Great stuff thenks !
Hey Joe, thank you so much for your efforts and planing to present relevant and purposeful video content to our machinist community. BTW, please start a senior division for your maze challenge for the 2020 Summer Bash, no prizes needed, just bragging rites for us old machinists.
Joe, where the hell were you 40 years ago when I started Machining?? If I ever get to Austin someday, I want to shake your Hand. you are awesome. Keep it coming.
I have to agree with Keith Monarch, this is a great video, you done it again Joe.
Thanks.
Nice procedure Joe, I wrote to you last winter about a similar situation, I was into during restoration on a very old screw jack that had broken on my Grandfather when a wood wheel came off the axle on a fully loaded hay wagon being pulled horse team on the way back to the barn it was sometime in the mid-s20. My father always told the story about Papa pulling the broken jack out from under the wagon mad as hell and walk over to huge gully and toss it as far as he could. The jack was rediscovered in the early s70s when the farm was being developed into an apartment complex by an excavator operator that was good friends with my father. I guess since it was buried deeply in a clay swamp it was preserved fairly well. That's when I first heard the story about the jack, my dad was about ten years old at the time it happened. My dad hung onto that broken old jack for the rest of his life and it was passed on to me with the request to get it working again. I did, but it's only an ornamental piece now. I could have done a much better job had I saw your video first. My sister has it hanging on a wall in her family room now along with many other artifacts from our family. Thanks!
Love it.
Fabulous video. Beautifully shot with great camera angles. Thank you very much !
Great trick! Thanks Joe! I also like the boring/threading bar holder and adapters. I am going to have to make some of those.
Joe, this has been a godsend for me. Threading in reverse is a revelation making it so easy to work to a dead stop or should I say from a dead stop. Brilliant! I just did an internal thread only 1.5 mm deep and 0.5mm pitch!
Good to hear. You'll never go back to the old way.
Are you doing this on lathe with metric screw?
@@bpark10001
In truth it was a custom thread of 7mm dia but 50 tpi. This meant I could engage the half but using the timing dial on my imperial Myford.
Thanks Mr. 3.14 for all your video tips. This is one of my favorites!! CJ
thanks for watching. Much appreciated.
Incredibly clear and instructive! Thanks a lot Joe!
another great video Joe! Thanks.... i have learned a hell of alot watching your videos !! You are a true craftsman!
Fantastic! That is one job that has always caused me the most grief... Thanks!
The boring\threading bar jig is outstanding...one holder and all bar sizes on center.... amazing.
Excellent! I learned a lot. Great training aid, it makes it very easy to understand what is happening (out of normal sight).
Great video. Love the cut away and in depth explanation! Subscription added!!
Glad you liked it! Thanks for the sub.
Learning lots from your videos Joe...Thank You
Thanks for the lesson, Joe!
Great Technique as well as video Joe Thanks heaps for this along with all your other tutorials. This is not something I have encountered as yet however I am aware now of a sound and accurate process to do this.
Many thanks Joe from John, Australia.
Another excellent video Joe.
For demonstration purposes a strobe light is a very handy tool for viewing rotating elements.
Excellent demonstration, I was impressed by the floating collet,so simple but very effective,
That takes the tool chip potential out, and eliminates the tip flat difference issue.
Great solution as always. Well presented. Thanks for everything you do. I've learned an awful lot from you over the years - many thanks!
I'm happy to pass it along.
Good stuff Joe. The half part was great for the visual. I've had to do this a few times... more so with od threading. I once had to pick up a 10-32 thread on the cnc to thread mill it a little larger when it shrunk with heat treating. Basically used the same principle as you have described here.
that was brilliant joe. thanks for showing how to pick up an internal thread. you are an arsenal of very usefull machining information and totally love your channel. thumbs up bigtime.
47 years of scratching my head made me very creative. Thanks.
Explains the balding spots. Good video Joe. Thanks from most of us.
Genius Joe, Thank you very much!
That's a pretty clever solution. I like the use of the indicator to pick up that blind measurement for getting centered.
It will get you very close if all preceding steps have cooperated.
Great tutorial! Never would of thought to cut the piece in half to demonstrate.👌👍
Just used this method to get a draw bar to take all of the collets, Thanks again for the informative videos.
Glad to help
@@joepie221 I just re-watched this video because the new to me lathe also has a collet draw tube that has been dropped. Looking forward to when the VFD gets in so I can try this out myself.
Great video as usual. Good content and info and camera work. I never stop learning from you. Thanks for sharing with us. Dan
Thanks for sharing your technique sir joe, i was taught to chase thread using compound slide, not very effective.. Great video tutorial.👍
Excellent demo Joe!
Hey Ray, Thanks. You guys still Ok with all the fires around ya?
Thanks Joe.
Always very helpful
Awesome Video JOE
Just got in 3 different sizes IL threading tools and inserts. Always had used company threading tools and inserts. Seen it done several different ways . This is the only was I have seen that works 100% for me.
Thanks for sharing these younger guys I know will be in the shop first thing trying this. Awesome video as usual
Watching in Alabama
Good Luck.
Excellent information! Thanks for sharing!
Awesome as always Joe!
Hi Joe
Excellent video again, I used to work in a Ballscrew factory in Coventry 🇬🇧,1980 to 2005 and nobody cut threads weather it was a ball track or threads the way you do, I now do it your way, thinking about it your way would have helped a lot!
Good tip! Great video! Thanks for sharing the knowledge!.
the hardest thing sometimes is to get the part to run true in the chuck. then deal with the baclash in the machine. thanx joe i do like the bar setup with the indicator!!
Thank you very much Joe. You are one smart man I love you videos.
More Joe Pie amazing wisdom! Thanks for sharing...
Great video, as usual. Always something new to learn.
what a neet idea ! well done sir ! thank you for sharing ! in the future I may well need that !
Bob......
Thankyou as always Joe! Great video!
Joe, in short. What a fantastic idea/video to perform I.D. thread repairs What a great process 😁...
Nice. Can't wait to give it a try. Thanks
Engine Lathes are easy. I was doing this 30 years ago. I just came up with a new process two days ago on a CNC lathe without a compound. 3 5/8-12 ID thread repair on a 10' long telescoping tube. I picked a position behind the Chuck to make a timing mark on the Head Stock and Mounting Ring. I used a small amount of JB Weld to cover a small spot of about the first 4 thread. After setting Z0 at the end of the tube I checked the timing marks then moved the threading bar to the center of the first full thread. Marked down Z-.175" I set program to start at Z+.100". Run first pass and stopped. Checked the marks over the JB Weld. Looked Good. Run the Program to end. Needed minor adjustment to X diameter and about 0.004" to Z. Ran 10 tubes before quitting time.
Great video Joe, thanks for the tip can't wait to try it 👍👍
Nice video techniques, you are no amateur. Also like the way you used a sectioned piece of work to illustrate the cut. I've known of turning from, how would you say, on the back side with the spindle turning backwards, nothing like threading a blind hole, done it many times, making camera lens adapters, etc. I've always done the threading by "feeling" where the bit was, not by using the dial indicator and splitting the difference to find the center of the thread. Nice work, as usual.
Jim
Nice demo Joe thanks.
Top tip as usual. Thanks Joe.
Pro tips as ever, great use of cutaway part👍
Nice demo. Thanks joe.
As usual very well described. The only suggestion that I would make would be to determine the speed that you intend to run the part since on some lathes changing the speed after locating the tool can create a problem concerning location.
I can not speak to all machinery, but the possibility does exist.
I watched this for the 2nd time now I know what I did wrong. The grammar is fine with this old rascal. Thx Joe
My very first attempt at picking up a thread was on an internal. It certainly wasn't voluntary! Thankfully, it was on a large bore, 5 tpi, and near the beginning of that operation, so it was a little easier to absorb any differences in how the tool bit was set.
That slip was the first of several that convinced me that the old original lantern tool post could not be trusted. There are "turret" tool posts, I started calling this one my "tourette's" tool post, as it became the cause of several sudden outbursts of profanity ...
Just watched two of your videos today and you used the word "unloosen" in both of them. I'm furious! - Love the tips by the way, thank you.
Thats my word.
great video, thanks I can see this being very useful in my shop..keep the vids coming
Excellent idea. My old Southbend 9A might have an issue running backwards as that could unscrew the Chuck. I will give it a try with real light cuts. Thank you.
Maybe you can fit a long bolt inside the chuck running through the spindle. Then lock it with a fender washer and nut on the outside end of the spindle. I have not tried this yet, but I have the same issue with my Craftsman lathe. The threaded spindle has no protection for reverse turning. Theoretically, it would be best to use a bolt with a left hand thread. My reversible drill has a chuck that screws on to the right with a left handed bolt in the center that screws back into the spindle. It stays tight under power in either direction.
Great demo Joe, thanks. Tend to wonder if backlash is catered for satisfactorily.
Very cool and exacting method of picking up the threads after a screw up when threading. I’m a total novice but just recently was trying to make a spindle nut protector for L-00 spindle on my old Clausing 5900 lathe in which I’m adding a lever collet closer . Anyway I screwed up midway cutting the external 3.5” x6tpi thread. I spent about 30 minutes thinking about how I save the mostly finished nut I was making and did a lot of what was described in this video. I love the the indicator because I just eyeballed my repositioning of the boring bar. This was very cool. Thanks again. I really like your videos Joe. They almost always hit home as very useful.
very slick.. nice work..
12 people think the thumbs down is the download button! Lol great technique as always!
Great tip with the indicator sir Joe,, I like the reverse threading too, the bushing is a bonus tip never thought of that👍 keep em coming.
awesome lesson and now another build project for the list....atb
Hi Chuck. Thanks for stopping by. Hope all is well.
Great video. Thank you. I've often wondered how to do this.
This is one of many I would have to say..
@@joepie221 I watch all your videos. I'm always waiting for the next. So much knowledge and experience, you always do your videos in a very organized format that makes it easy to apply in the shop. Thank you once again.
I hope I never have to use that trick. At the very beginning of this demonstration My only thought was, how's he gonna line this up. very clear demonstration Thanks Joe
I was wondering about your boring tool holder from previous videos. Nice design!
Shoot, picking up an internal thread is easier than an exterior.
Well done and thank you sir!
You still need to be careful, but its not too hard.
Outstanding! !!!!! I love the unloooosen? Technology.Er terminology.
I will use that word until I die.
Always neat. My kind of video.
Joe.......true dental mirrors are " first surface " mirrors. The mirrored surface is applied to the outside surface. Very fragile but they do not give the distorted or double image of the typical tool truck mirror where the mirror surface is on the backside of the glass.
I never knew that.
My heartiest salutes to you for the most innovative and out-of-book solutions to such unusual challenges. I have learnt a lot from your videos (just like many others! ) and someday I hope to meet you and hold your hand to say Thanks.
By the way I have doubts that this technique may not hold good for 26 TPI or finer threads, but hope you may come with some genious solution for that too!
When cutting threads smaller than 26TPI, I imagine you are using a tap and the same basic technique will work. Leave the tailstock loose so the tap will pull in by itself.
@@millwrightrick1 Thanks Richard, yeah it's true! I guess I was over-thinking on the single point inserts, and forgot the taps.
Joe, I have learned so many techniques from your videos. Very fine educational materials you offer us. Thanks for sharing.
Thanks for the support.