Auto Retracting Thread Cutter.

[@paulfeist]

As a former gunsmith, I've threaded up to a shoulder of a rifle barrel quite a few times... and have been "not quite fast enough" to stop the feed, and retract the tool simultaneously, a few times as well. I'd have dearly loved to have something like this when working on expensive barrel blanks! Clever design and very nice work!

[@Thesheddweller]

Hi, thanks for your comment. I do know what you mean about missing the spot. There are now several of these that have been made around the world. All of them with a silght difference and I belive that one Indonesian country is manufacturing them. I think thats great. I'm happy that an Idea of mine has a place in someones tool box. regards

[@donteeple6124]

@@Thesheddweller As an older gunsmith, despite decades of experience, I find my reflexes and eyesight arent quite as sharp as they were years ago. I recently was threading a shoulder on a rifle barrel and did the proverbial OOPs OH CRAP, and crashed into the shoulder which broke the leadscrew shear-pin. GRRRRRRRR, Well that left the job undone, a slightly FUBAR'd barrel shoulder and a lathe that took time to be repaired. Needless to say, frustrated and P/O'd at myself for such a stupid mistake, realizing Im not as young and quick as I used to be, I promptly ordered an auto retract threading tool as a Christmas present to myself. The present missed Christmas delivery but will be here friday....

[@paulgreenlee190]

What a great tool Sir. I'm only a hobbyist when it comes to machine shop work. My career background is pipe welder, tube welder, fabricator, and Boilermaker. I own a 1960 South Bend 13" lathe that had a lot of hidden issues until I actually did my project. I guess buying a lathe is worse than dealing with a used car salesman. I want to say thank you for sharing your work, if I ever am able to pick up a nice little mill I certainly will give this project a go. It was amazing to watch it work especially at 1000 RPMs

[@Thesheddweller]

Hi Paul, have fun. cheers

[@ToreDL87]

I was proverbially sent at your pucker factor terminology 🤣 That aside, this is the most ingenious lathe tool I've ever seen, kudos! I hope you filed a patent before anyone gets any ideas!

[@Thesheddweller]

Hi, I'm glad you enjoyed the video. A patent is as much use as a female breast on a mackeral. There are far too many countries in the world that do not respect the patent system. cheers.

[@melgross]

Ingenious! Now, all you need is to make a stop, attached to the lathe bed, so that you can set it beforehand, and when the tool gets to the point where you want it to pop back, it touches that, and the device is triggered. You don’t have to do anything after it’s set. You’ve got me thinking about this, so I’ll go to the drawing board, and try to make something like this. So, thank you there.

[@Thesheddweller]

Hi, yes I have thought about this, but I have so many projects on at the moment that I’m not sure whether I’m coming or going… It’ll be good to see what you come up with..

[@melgross]

@@Thesheddweller you and me brother. It’s a cascading problem. In order to complete one project, I need to make something, which triggers another thing I need to make, which gives me an idea for another project, and so on. I must be somewhere in a good dozen projects at any one time.

[@Thesheddweller]

@@melgross so true.. :-)

[@n9viw]

Absolutely amazing. Your creativity never ceases to thrill me- it's a joy to watch you work, mentally and physically. Thank you for sharing!

[@Thesheddweller]

Hi, thank you, cheers

[@brandonshudy789]

I’m pretty new into the machining. it is always so good to see videos of guys with a solid work ethic and willing to put in the time to do the math, work, and finish complex thinking projects! Thank you for providing us with wonderful videos!

[@Thesheddweller]

Thank you for your comments, being new to machining is a great hobby/skill and if I can throw my pennyworth in I would say this as I always said to my apprentices. "All machines are living devices… they have one sole purpose in their life… that is to kill or maim you.. always be mindful of how to quickly stop the machine in an emergency… always wear PPE.. Never wear gloves while using a machine.” It is important to read all safety notices and/or a factories act. above all.. have fun.

[@Thesheddweller]

Hi, thank you for your comments. regards

[@robertqueberg4612]

You have got a winner. The “puckering” that you referred to, is something that I experience after more than fifty years. Now to find a way to get around the inch vs metric spindle reversal issues. I am now a new subscriber.

[@Thesheddweller]

Hi, Thanks for your feedback I've never really cut threads in my working life, because the stuff I machined was too big for threads, it wasn’t until I retired and started my little workshop that I realised how efficient a laxative that threading could be. At work most threads that were cut were done using big Die heads and massive taps, until the CNC turned up then everyone got a dose of the S***s.

[@tonyray91]

The inch vs metric spindle reverse issue can be tackled with a dog clutch Google Meek screw cutting clutch, unless you have Myford you would need to develop your own implementation but the principle is there.

[@robertqueberg4612]

@@tonyray91 , Hello. I did look at the dog clutch that was made by Graham Meek. It looks like a great option. My next step is to find some drawings, as a start to adapt the concept to a 16” South Bend. I thank you for the suggestion.

[@tonyray91]

Hi Robert, The Myford version is published in Meek’s book which is similar to what you would need on an SB model 9 but if the 16 has an internal reverse mechanism this might be more informative www.model-engineer.co.uk/forums/postings.asp?th=171112&p=3.

[@robertqueberg4612]

@@tonyray91 , Thank you. I am on the hunt.

[@mikecurry3679]

How to know if your machinist is really a machinist. Listen to their terminology. You don't have to understand the lingo, only recognize it. If your machinist says things like "pucker factor" you can rest assured, this is a veteran! I see all kinds of KZbin vids of people machining at home. While many manage to achieve end results that at least look like what they set out to accomplish, this channel. I can say as a multi decade invested in this industry personally, is of the highest caliber! After watching the tail stock correcting series, I knew this guy was the real deal. He doesn't down play mistakes, and spite trying to lay out well in advance his plans taking into consideration the necessity of orders of operations, but down to details like avoiding re clamping work pieces if possible, and checking square and concentric before and after, he still shows and explains how and where things go wrong, and explains his plans on how he can do it better next time. If you learn more from accidents than getting it right, then you are top notch in my book! It's difficult to make entertainment content about material a person sees 40+ hours a week for many years in a row, and still be captivating. Yet this channel is one of my favs.

[@Thesheddweller]

Hi Mike, Thank you for your comments, they are very encouraging. The problem machine engineering at home presents is that, one can very quickly find ones self lacking in resources, not just the material ones, but the skills that have to be very quickly learned, like draughting, material acquisition, filming, sound and so on. After what was a lifetime following orders,... (read a drawing and machine a given amount of material from a piece of material to achive the next stage in the process and pass it on for further processing at the next station.) I am lucky to have had the opportunity to have used almost all machines on the shop floor in an effort to remain employed during my working life. I enjoy working in my little shop and because there are a lot of Channels out there telling you how to do things, I prefer to show it how I do things with what I have. ATB..Cheers.

[@rogerdeane3608]

Excellent accessory to the lathe. There would be a definite market for this unit. I wish I had the time and the patience that you have to built one..

[@Thesheddweller]

Hi, thanks for your feedback. I have been approached by dozens of eastern manufacturing companies asking for my approval for them to manufacture this unit. I have stated and will continue to state that, everything I make or publish is open information for everyone to copy and must not profit by it. So I take it that variations will soon appear on the open market very soon.

[@theamateurmachineshop2150]

I am surprised I have never seen this before. Many lever activated retractable but never spring loaded! Thank you for sharing your prototype and thoughts! 👍

[@Thesheddweller]

Hi, thanks for watching.

[@CanadianPenguin_]

If you have a lathe with a kill switch for the chuck guard being lifted or the back cover being opened, you could extend the wiring to those switches and move it to the ways as an adjustable stop for when after the tool pulls outs it shuts down.

[@Thesheddweller]

Hi, a good idea but, to be fully effective the chuck spindle must have a jet brake and the chuck can't be a screw-on chuck. cheers.

[@edwardhugus2772]

I just found your videos watching the collet holders. I saw this alien contraption for threading and was interested. Now I get to see you make it! You, sir, deserve a sub and a bunch of thumbs ups.

[@Thesheddweller]

Hi, Thank you, thanks for watching, cheers

[@TomMakeHere]

I do prefer mechanical systems for something like this, so this gets the tick from me Great work, and great tool

[@Thesheddweller]

Hi, i have watched many of your videos i particularly like the gearbox and I wondered if i could make something similar for my lathe. I also found a large magnetic chuck in a skip, after taking it home I stripped it down cleaned it up and reassembled it works fine, but i’ve never used it, not yet anyway, they are bloody dangerous things to strip and rebuild.

[@mpetersen6]

@@Thesheddweller Plus the eletro-magnetic ones need a power cable that winds up around the spindle. 😖 I've used smaller magnetic chucks on lathes and I was always leery about using them. The tool grabs and watch out. Plus every time I used one I always took a very light skin pass across the the face as the chuck may have been used on a different lathe. I think Clickspring has the right idea of using cynoacurite for small thin parts.

[@Thesheddweller]

@@mpetersen6 Hi, thats probably why I’ve not used it yet.

[@markamy357]

Brilliant KZbin channel, Looks like a smoother thread because of the greater speed you can now use.

[@Thesheddweller]

Thank you for your kind comments, yes, the faster the thread is cut, the better is looks.. but, I must warn you that the faster you go, the pucker factor increases. regards.

[@hypersphereengineering6015]

I'm impressed. I knew a guy who had a gadget called a snap tap. Very similar to what you built. I love the auto retract adjustable fixture you put near the chuck at the end. Brilliant.

[@Thesheddweller]

Hi, thanks for your comments.

[@johncrisman576]

I just discovered your channel and love it. You are the Sir Richard Attenborough of machining videos. And bonus, you have a keen sense of humor. Great job! I’m an enthusiastic subscriber.

[@Thesheddweller]

Thank you for your very kind comments, but I think Sir Richard can breath easy.

[@rogerwilliams2902]

I used to own a Hardinge HLVH, now sold. You could thread up to a shoulder with automatic withdrawl at a 1000 RPM !. All day long. However, the tool you made is excellent , well done.

[@Thesheddweller]

I know, the fitted option is perfect.

[@t.d.mich.7064]

Nice exercise in processing! I've cut about every kind of thread on the lathe you can imagine, and you are right, there have been a few times the pucker factor came into play. I'm glad to report no permanent damage to the sphincter or the lathe.

[@Thesheddweller]

HI. Thank you for your comments. I’ve not cut a huge number of threads in my time, but one thing I do know, is that the two laws of probability ‘sods law and murphy’s law’ both play a part in thread making, doubly so when using thread gauges. regards

[@pc7082]

Super cool ! Love when people create a complex but simple mechanism. As someone (who probably never invented a tool in his life) suggested, You could start the thread from the other side, but I never did like that. Very cool. I willmsave the video and hopefully one day have the time to make something similar… That hopefully works as well !

[@EDesigns_FL]

You developed a great tool, simple and effective. I'm surprised that someone isn't marketing this product. I have been working on a different solution to the same problem. My plan is to use the output from a DRO scale to set an electronic stop which would control a VFD with a braking resistor. Your solution is far more practical for mass market application. Thank you for sharing it :-)

[@Thesheddweller]

Thats a brilliant idea. because it doesn’t have to be triggered by a DRO it can also be triggered by a mag mount slide switch for those without DRO's

[@EDesigns_FL]

@@Thesheddweller A switch would work, but I already have a DRO and it offers some other advantages. I want to be able to start deceleration before the carriage reaches the actual stop location and need a method of measuring carriage velocity. I intend to use a rotary encoder to measure the velocity of the chuck.

[@Thesheddweller]

@@EDesigns_FL Have fun.

[@rogero9633]

I like your design and what's important it works on your machine. What I like about it is that the workmanship is so good and it looks tight. I'm still trying to find a good mill and lathe and get to working on it. I have many projects to accomplish. I hope that I do as well as some people. I am trying hard to find a quality machine too, I like precision and accuracy.

[@Thesheddweller]

Hi, I just wish after building the shed that I had enough money to buy better equipment, but as in life one has to make the best with what one has. If I could wind the clock back, would I have chosen differently, yes I would have bought old British, German or American machines and refurbished them if they needed it. as I did with the my grinders and will do with the shaper.

[@ChrisBrown-dy8ts]

That’s some good machining and great idea. My Colchester has the “Ainjest Quick screw” attachment so it can be used for Ext, and internal threads up to a shoulder it’s a great piece of kit.

[@Thesheddweller]

Hi, thanks for watching. I know some machines have them as standard.

[@sambishop3211]

This is my first video of yours. Looking at your other videos, I see that (despite being on here for four years) you don’t have very many. Please tell me that is going to change. You, sir, are fantastic.

[@Thesheddweller]

Hi, thanks for watching, I have also built half a house in that time. Despite this I’m only able to make a video, one every two to three months, due to other commitments.

[@sambishop3211]

@@Thesheddweller There’s a lot of great machining content on YT but a lot is American and while I have nothing against our transatlantic cousins, pronunciations of aluminium, lever etc along with US customary units drive me crazy. I wanted to find a UK-based channel (preferably the North of England) using the metric system so I could switch off that pedantic, critical part of my brain and focus more on the content. (I know, it’s practically a mental illness - right?) Finding this video was brilliant especially while stuck at home all the time! You really check so many boxes for what I’d want out of a creator. Suffice it to say that I’ll be glad for any projects you have to share and you can count on an eager audience of, at least, one for any future videos.

[@Thesheddweller]

@@sambishop3211 Hi, Thanks. To some, I chatter too much, others say I don’t have enough content. I know I make mistakes, but mistakes are made on TV as well. Its always good to have someone that is perpared to bash the keys and show their appreciation. cheers.

[@metalmogul4691]

That is a bit of an effort in order to take it from the drawing to the prototype. It is a wonderful tool. Threading at the higher RPM certainly improves the material finish. It’s a good choice of a threading tool retractor for softer material and cutting right up to the chuck. Thank you for sharing your idea and showing the steps to make it.

[@Thesheddweller]

Hi, Thank you very much for your comments, I’m glad you enjoyed the video.

[@brianlrayburn2576]

Amazing! Thanks for sharing. I enjoy seeing folks think outside the box.

[@Thesheddweller]

thanks, I’m glad you enjoyed the video. cheers

[@DudleyToolwright]

That's some really nice work. I enjoyed your workaround solutions to deal with vise limitations. The design is intriguing as well.

[@Thesheddweller]

Hi Dudley, Thanks for your comments.

[@jmtx.]

Truly an awesome addition to the shop! Great design and build. Now your bladder can rest easy.

[@Thesheddweller]

Thank you for your comments. Regards

[@erwanrc8117]

Great work keep it up ! You just got a new subscriber, I'm in my first year of apprenticeship as a machinist in Switzerland and I'm loving the job ! Have a blessed day

[@Thesheddweller]

Hi, Thanks for your kind comments and thanks for watching. Machine engineering is a great career but, as you will find out, it can be a bit like (real) police work,... in a word,.. repetitive, except that you are rewarded with an end result, something that will probably last for ever. enjoy. PS. I'm just about to make another video for the two chucks, a modification.

[@tvathome562]

You absolute gent, I've been searching for a free physics simulation for mechanisms all weekend. Algoodo to the rescue!

[@mikecurry3679]

In my experience, spiral fluted taps are really only your friend in blind holes. Any through holes, I highly recommend standard straight flute, Japanese taps. Heavy weight oil on steel and stainless. Tap heavy is messy, but has proven itself superior to just tap magic. Clean up heavy is best done with some acetone, then some isopropyl, or that I had available.

[@jeanpauldelmasbastide616]

Il y a quelques mois , j'ai découvert votre chaine . J'ai particulièrement apprécié la réalisation de ce porte outil rétractable pour les filetages . J'ai tout de suite entrepris la réalisation de ce dispositif en le modifiant pour le rendre plus compact . Les essais ne sont pas encore là . Dommage que votre blog soit fermé, je vous aurais bien envoyé quelques photos. De toute manière, je tiens à vous féliciter pour le travail que vous réalisez et pour les connaissances que vous partagez.

[@OscarGonzalez-dl7ye]

nice job, i´m designing my own lathe and now i'm in the part of auto feeding to make some threads and this video is so helpfull

[@presstoolsengineering8365]

brilliant idea...... you have steady rod set at head stock to activate the retract lever but at the same time it is also necessary to disangage slide attached to lead screw

[@Thesheddweller]

Hi, thanks for your comments. yes the Half nuts are opened manually as soon as the cutter retracts. Regards

[@petergregory5286]

Design deserves all the plaudits below. Regards

[@Thesheddweller]

Hi, thank you, thanks for watching.

[@kevinmaiorka5370]

Absolutely brilliant and now I have another project. Thanks for sharing this video with us.

[@Thesheddweller]

Hi, Thanks for watching.

[@craigguinn5423]

This is fascinating. My lathe only goes down to 360, so a definite problem, this might solve. I just have to decide if I can adapt one. Great to have access to the drawings.

[@petera1033]

FYI: George H. Thomas designed a retractable tool for just this purpose-( I think Hemingway actually have a kit for people to make it) and as you may well know- Hardinge lathes come with the feature in built. Love your content.

[@Thesheddweller]

I haven’t looked at the catalogue, I believe the Hemingway.co have all sorts of wonderful gadgets, some with very high price tags also.

[@Gottenhimfella]

The Hardinge & GHT solutions are not self retracting, so they reduce rather than eliminate the pucker.

[@Thesheddweller]

Hi, thanks. Regards

[@dougnash513]

Great tool! you could ofcoarse start the thread from the chuck end and cut it towards the end of the shaft, thus eliminating the 'pucker' factor.

[@Thesheddweller]

see FAQ’s WWW.thesheddweller.com

[@nycmusiclessons]

Love the ingenuity. Never seen anything like that. Personally though, I just flip the cutter upside down, run the chuck in reverse and then start the cut from the chuck moving toward the tailstock.

[@Thesheddweller]

Hi, thanks for your comments. May I suggest you see the FAQ's at www.thesheddweller.com

[@nycmusiclessons]

Ah ok I understand now. Still great solution!

[@FCleff]

Brilliant! Having experienced more than a few explosive puckers, I expect the time invested will be more than compensated for in reduced laundry bills.

[@Thesheddweller]

I do believe I'm saving a bob or two on laundering.

[@phillipjones3342]

I was curious and turns out that’s a fantastic idea well done well thought out

[@Thesheddweller]

Thank you for your comments, thanks for watching.

[@sweetpeaz61]

excellent! thats a really smart tool, well done. after spending years manual thread cutting and gaining more greay hairs than i deserve I an now spoilt and have a Harrison Alpha semi cnc lathe ..but still pucker when the thread runs to 0.010" from the chuck jaw at 1000 RPM ;)

[@Thesheddweller]

Hi thanks for watching.

[@ronwilken5219]

Great job sir. Impressed with your attention to detail. In your "design stage" did you have a look at Geo Thomas's book and his design of a retractable thread cutter. Not quite as elaborate or self actuating as yours but effective on the "pucker factor" none the less. Congratulations, Ron Wilken Canada

[@Thesheddweller]

Thanks for watching, I haven't read the book, might get a copy. regards

[@thomashenderson3901]

Great idea. Must say I've always gone for the quick wrist flick but then the bigger shoulders and shorter stick outs limit that at speed...or I give myself a root diameter groove to work to and make sure I'm ready to react! Either way, your system trumps the lot and the ability to work at a speed that suits the tips as a CNC lathe would, is brilliant! Congrats.

[@Thesheddweller]

Hi Thomas Henderson, thank you for your comments. The tool will need a thread root groove for bigger threads or the insert will break.

[@thomashenderson3901]

@@Thesheddweller I saw you say that in another comment. I take it the spring-out is so sharp you practically end up with a dead stop at the end of the thread? Job for the Mk2 version, cams out the thread depth in a single rotation and then jumps right out of the way. :-)

[@Thesheddweller]

Cam out before snap back is worth investigating. I'll look in to it....... When I get a couple of spare minutes. Cheers:-)

[@thomashenderson3901]

@@Thesheddweller Keep me in the loop! :-)

[@SubramaniamLakshminarayanan]

Loved it, the process of making it even more. Congrats!

[@Thesheddweller]

Hi, thanks for watching, glad you enjoyed.

[@someguy1508]

What a beautiful tool, I hope I get around making one like it. Thank you for sharing.

[@Thesheddweller]

Hi, go to www.thesheddweller.com for the sketch

[@someguy1508]

@@Thesheddweller thank you, I was checking out your site this morning. What make is your surface grinder. I like how it was made for coolant, I wish mine had been built that way. I use a mist system, it works ok.

[@surinderdhiman]

Amazing workmanship

[@Thesheddweller]

Hi Surinder, thanks for your comments.

[@Mark_How]

Is this what I'll be like when I'm older? Because I sure hope it will be. I can only admire the time and care taken. Time and opportunity in the shed has been sparse lately

[@Thesheddweller]

Hi, thanks for your feedback. as far as YT is concerned I’m still learning, but you are right, shed time is a little restricted.

[@TopNotchSkateboards]

I like your approach, designing process and machining. It is interesting designing and proving a design concept. Sometimes while in the manufacturing process of the parts of a concept design you may notice varies that were not considered in the design. These type of situations for the most part are solved by the machinist on the shop floor. I see this in your video and respect your knowledge and skill. awesome!

[@Thesheddweller]

Hi, Thanks for your kind comments

[@dougiehogarth6652]

Great design and well made .. in all my years as a toolmaker I have never seen a surface grinder with the wheel running anti clockwise,, .may I make a suggestion .. when using the side of a wheel dont us coolant for some reason it doesn't clog up so bad ( don't know why) greetings from a retired scotsman in South Africa.? Keep safe from mr covid.. Dug Hogarth

[@Thesheddweller]

Hi, Dougie. Thanks for your feedback. I'm hoping my next project will meet with your toolmakers eye, with simillar praise. It is true about the side load grinding, I used suds to prevent the bluing that can occur if its not used. I also shaped a relief in both side faces and redressed the sides regularly with a carborundum stone.

[@scottcarr3264]

A very intricate device indeed. Well done.

[@Thesheddweller]

Hi, thanks for your kind comment.

[@ScottHamilton-ys2cm]

Great design, and even a better job bringing it to life. But I have one little trick to share with you. Shortening a tension spring and creating the loop is actually very simple. First determine how many coils you want to remove. use a Sharpie to mark the center between the two coils, the line up the mark on a 90 deg corner of a vise, and give it a quick rap with a steel hammer. This will split the coils by a 45deg angle. use a die grinder to cut through the unwanted coil, then fine tune the end loop. 5 minute job.

[@lawmate]

Great gadget, it makes things quicker and also you get a finish on the thread that's unachievable normally

[@Thesheddweller]

hi, that’s right.

[@rickpalechuk4411]

Wow! A fantastic prototype! Best be applying for a patent. Thanks for sharing your knowledge with us. Cheers

[@Thesheddweller]

I’m afraid that has probably gone to Srilanka, they have asked a lot of questions about the thread cutter.

[@Demonlord468]

Ive been having really good results from running the threads backwards with the cutter upside down and running the lathe in reverse and starting the cut from the inside of the thread so once it makes it to the end of the cut its impossible to mess up. This is very interesting non the less. I like this idea for sure.

[@Thesheddweller]

Hi, thanks for watching, please see FAQ’s at www.thesheddweller.com

[@tomthumb3085]

Terrific piece of conceptual engineering. Absolutely spot on with your brilliant idea an execution.

[@Thesheddweller]

Hi Don, thanks for your comments, I’m glad you enjoyed. Regards.

[@killer52lt]

That is fantastic! Takes some stress away and lets you get really close to the shoulder if need be. To be honest, I still clench when threading up against a shoulder on a CNC lathe.

[@Thesheddweller]

I always did when the guy next door threaded on the CNC. I’ve seen him run down the workshop a few times.

[@billbaggins9961]

Very well designed and machined! Nice work

[@Thesheddweller]

Hi, thanks for your feedback.

[@bobgitsham6926]

An excellent concept and making of a very handy tool. You say that you have to user a dixon style tool post and holder. I Don't see why it could not be made to fit an Aloris style tool post and holder.

[@Thesheddweller]

Hi, thanks for watching. What way the cutter is held, doesn't matter. I would have made it for a standard mount if I used one. regards

[@pcka12]

There is a retracting tool design for Myford type lathes - Martin Cleeve screw cutting book?

[@samrodian919]

What a very good idea ! I too have a Warco lathe, mine has the milling head mounted on the headstock (WMT300) unfortunately I do not have half nuts on my carriage so I have to stop the lathe pretty smartly when coming up to a shoulder and into the runout groove and then retract the tool 100 thou and then reverse the lathe all with the change wheels engaged . As much as I would love to use this sort of design I can't see how it would help in my situation, plus the fact I have a Multifix tool post and no chance of making a 40 position tool holder for that little item!

[@Thesheddweller]

Hi, multifix tool posts, excellent choice of equipment. I admit that not having a half nut system on your lathe is going to make threading a little more than awkward for you, I don’t envy you. But I also have to leave the halfnuts engaged while cutting some imperial threads on my metric lathe, I haven’t crashed yet. ‘Touch wood’

[@scottroland6577]

Outstanding design. Thanks for sharing! Scott

[@Thesheddweller]

Hi Scott, thank you for your comments much appreciated. Regards

[@lacaver64]

that is a very good sistem for treading any machines have this tool but its rare see it , you have make a good work mister

[@Thesheddweller]

Hi lacaver64, Thank you for you kind comments, regards

[@dannypeto8734]

Nice touch, now I wont a Surface grinder and small Shaper, but most seem to be on the east cost, I know there are some here In California but they are not parting with them.

[@pauldevey8628]

Great engineering. I have never seen anything like this.

[@Thesheddweller]

Hi, i always say, 'that there’s nothing new in machining’ and it's true, its just that some things aren’t aired very often. regards

[@gagasmancave8859]

lovely little project now on my things to do list

[@Thesheddweller]

I’ve put the sketch on my website www.thesheddweller.com

[@khanabdulrehman3913]

Great job and machining tricks. Well-done sir .👍

[@Thesheddweller]

khan abdulrehman Hi, thanks for watching.

[@mpetersen6]

Situations like this are one reason I am really in favor of Single Tooth Dog Clutch systems similiar to those found on the Hardinge HLV-H/EM and other high end lathes. With an adjustable stop collar that is on an operating rod connected to the handle that engages the Dog Clutch. Engage the clutch, take a pass and the tool stops when the dog clutch is dis-enganged. Retract the tool (cam operated on the compound) and engage the clutch in the other direction. You never stop the spindle. You never dis-engage the half nuts. Yes it takes the same amount of time to run the yool back but while it's doing that you can advance the tool for the next cut. Imperial, metric, Module or DP worms. Or any helical pass in the capabilities of the machine. It does not matter. The tool will always pick up the thread. In fact the Hardinge has no thread dial on the machine. The only constraint on the system is the dog clutches must run at the same rpm as the spindle. The other (and simpler) option of course when cutting threads to a shoulder is to run the lathe in reverse and thread away from the chuck. This however is not necessarily an option for threaded on chucks. www.lathes.co.uk/hardinge/index.html

[@Thesheddweller]

Hi, thanks

[@Gottenhimfella]

i could never understand why they did not design a multi tooth clutch -- say, four engagement positions per clutch rev, and run the clutch at one quarter of spindle speed. Then a big lathe with a heavy chuck and workpiece could thread at full speed without the teeth getting deformed by the impact (which always used to happen sooner rather than later to single tooth clutches in such situations)

[@WrenagadeWorkshop]

Just found you and what a ingenious tool, love it 👍 New subscriber and I'll be checking out the rest of your content too, thanks for sharing 😃

[@Thesheddweller]

Thank you for your subscription and kind comments.

[@gregwmanning]

Great idea and well implemented. Have I missed something, I can understand the tool retraction but what stops the carriage, the real scary bit?

[@Thesheddweller]

Hi. Its me that stops the carriage after the cutter snaps back. Cheers

[@mikedavidson1102]

Great idea, well thought out. I would love to have a go at making one of these, are the drawings available ?

[@mecanizadosgrela7380]

Congratulations, this system is very enteresting.

[@Thesheddweller]

Thank you for watching

[@mauricioriedo7836]

Excelente trabalho , poderia informar como faz para não perder o passo da rosca sendo que está desligando o fuso do carro novel para retornar à posição inicial ?

[@charanjitsingh5973]

This is very good working tools, I try to make it, sir.

[@Thesheddweller]

Hi, enjoy, have fun. regards

[@timshort3220]

That thing is genius. Great job

[@Thesheddweller]

Tim Short hi, thank you for your comment.

[@shawnlund]

That was absolutely brilliant.

[@Thesheddweller]

Hi, thanks. I recon there are now thousands out there now. cheers

[@AntoineGst]

Brilliant idea and excellent execution, congratulations man!

[@Thesheddweller]

Hi Antoine, thanks for your comments. Regards.

[@dallet40]

Молодец, мужик. Главное всё чётко и по делу. Почти как у Виктора Леонтьева

[@Thesheddweller]

Привет, спасибо за очень добрый комментарий. С уважением.

[@Georges-MILLION]

Bravo ! Très bonne idée ! Et une très bonne fabrication ! Félicitations . Georges Well done ! Very good idea ! And very good workmanship ! Congratulations. Georges

[@Thesheddweller]

Salut Georges. Merci pour vos commentaires. Je suis content que vous ayez aimé regarder. Cordialement.

[@boukhlikm]

Excellent travail monsieur . Un grand salut de casablanca " Marocco"

[@Thesheddweller]

Salut, merci d'avoir regardé, je suis désolé. Il a fallu beaucoup de temps pour répondre, j'ai manqué votre message.

[@homemadetools]

Excellent work! We posted this video on our homemade tools forum this week :)

[@Thesheddweller]

Hi, thank you, I’ll have a look there myself.

[@homemadetools]

@@Thesheddweller You're very welcome. Feel free to email me at "jon" at our website, and I'll send you a free coupon code so you can join our forum and post your videos whenever you want. Looks like you're one of us :)

[@Thesheddweller]

@@homemadetools Thanks, I have my own website www.thesheddweller.com. this is where I publish my sketches and drawings.

[@TheScaryName]

Love the content so far. I'd like a shop tour please 😊

[@Thesheddweller]

Hi, thank you. I’m glad you enjoyed them. As for the shop tour,…. Errrr,… wouldn’t you rather see the inside of my work boot,…. it’s not so cluttered. 🤣

[@orangetruckman]

Lol! The pucker factor 😂 that was an excellent way of explaining that. Subscribed 👍🏻

[@Thesheddweller]

Hi, Thanks for watching, I still find that phrase funny… :-)

[@johnwilimczyk4188]

Beautiful great bit of kit as you would say

[@Thesheddweller]

HI, Thanks for your comment. Absolutely… :-)

[@1ginner1]

Really nice design, but presumably you still have to disengage the halfnut manually after each pass?

[@Thesheddweller]

Oh yeah. Just as quickly as it snaps back if working at hi-speed..👍

[@1ginner1]

As I said really nice design, but if you will forgive me, its not really necessary. Mount your tool upside down, run in reverse, and screwcut away from the chuck.

[@Thesheddweller]

@@1ginner1 true, very true. But it works well for me with my lathe. If I had purchased a decent lathe in the first place I wouldn’t have made that tool. 👍

[@1ginner1]

@@Thesheddweller Haha, Good luck to you my new found friend, I look forward to seeing some more of your very clever ideas and mechanisms.

[@Thesheddweller]

See you soon. Regards👍

[@dalelathwell7219]

Have you tried to simply cut it in reverse and the tool on the opposite side then it cuts away from the chuck and no chance of smashing it would be a nice tool for the ml7 or any screw on chucks set up 🙂👍

[@Thesheddweller]

Hi Dale Lathwell, yes, I have tried working backwards and on the other side of the cross slide. My problem is that I have a cheap Chinese lathe and there are many things that are wrong with this machine including the half nuts and the numerical indicator, they are both at best ineffective. I have destroyed inserts and threads when the half nuts indicate the correct number but for some reason they are fractionally out of sync. This problem is also true regardless of the direction I start the cut. However, since using this device, I haven't had to disengage the half nuts, I don't collide with end faces and I have used much higher surface speeds. Hope this answered your question. Cheers.

[@dalelathwell7219]

With the feeds not meshing in i came across this problem and turns out that it was because my lathe had an imperial lead screw and I was cutting Metric threads Once the halfnut is disengage it will never land back in the right place

[@thomastucciarone1650]

LOVED this idea!! Great work!!

[@Thesheddweller]

Thanks, it's being copied all round the world, and I wouldn't be surprised if they are on sale from the "wish" shopping channel. cheers

[@pontoonrob7948]

This channel is great. Camera angles are a little odd but all good things in all good time. Should you become as fine a cameraman as inventor you'll have a 1/2 million followers in no time.

[@Thesheddweller]

Hi, thanks but I’m not an inventor, there's nothing new in machining.

[@alancollard8939]

brilliant ,i was wondering how you triggered it , found out at the end

[@Thesheddweller]

thanks for watching. try www.thesheddweller.com

[@FredMiller]

A new subscriber... Very impressive engineering and manufacturing. Congrats on a fine fixture. Fred Ontario, NY

[@Thesheddweller]

Hi Fred, Thanks for subscribing and for your comments.

[@mikeg7971]

looks promising, but what about split nut unlock ? how you match thread line for next repeat ? probably spindel stop is better solution ?

[@Thesheddweller]

Hi, thanks for watching. That is a bit of an art but, this is what I do. The lead screw indicator must remain engaged at all times. The chuck on my lathe is slow to stop so I must open the half nuts after the tool retracts. When the chuck stops I wind the chuck backwards untill the indicator realigns then I re-engage the half nut. I can now use the motor to drive the chuck in reverse so that the threading tool is taken back to the starting position, then I reset for another cut. hope this helps.

[@stanrogers5613]

You can still work the half nut in the same way. The automatic retractor just gives you a lot more time to release it - the tool is already out of the way, so your timing doesn't need to be nearly as critical. To do subsequent passes, you would use the threading dial the same way as you always have.

[@Thesheddweller]

@@stanrogers5613 That is true on my lathe if the tool clears the work piece, otherwise I have to revert to opening the half nut, its also worth knowing the motor on my lathe ramps down it doesn't just stop unfortunately.

[@mmattster]

Are there any drawings available? Nice product thankyou 👍

[@Thesheddweller]

mmattster, Hi, yes there are some drawings, you can pick them up free from my website www.thesheddweller.com However, this topic is one of my first and I only put it up as a poor sketch. Help is at hand, because I'm making some drawings right at this moment, I suggest you wait a couple of days so I can upload this updated set of drawings.

[@johndennis3181]

So engine type lathes don't have an auto disengage? All my lathe experience is with Hardinge HLV and CNC lathes and they both auto disengage. I imagine internal single point threads have to be extra scarry with no auto disengage.

[@Thesheddweller]

You’re a lucky chap. Some countries expect this device to be fitted as standard to most lathes here in the uk its an extra on larger lathes. regards

[@davesalzer3220]

I have no love for stainless. Brilliant piece of tooling.

[@Thesheddweller]

Hi Dave, Thanks for your comments. Horrible stuff, but it still has its uses. regards

[@Huggabizzle]

Fantastic! Are you manually disengaging the powered feed just after the tool retracts or is there some kind of torque limiter on the carriage feed that allows you to crash on the wm 250?

[@Thesheddweller]

Hi. I’m disengaging the halfnuts.

[@edwardteyssier2357]

@@Thesheddweller Hello. Great design. The trigger retracts the too! Did you think about the trigger disengaging the halfnuts?

[@Thesheddweller]

@@edwardteyssier2357 I didn’t, I was busy with other projects at the time.

[@sky173]

What an amazing project. Thanks for sharing this! It's very inspiring.

[@Thesheddweller]

Cheers

[@overdrive39]

"Pucker Factor" I like that saying. I am glad the American Machinist is not the only ones using that term. Cheers!

[@Thesheddweller]

Hi, you’re welcome.

[@rodney2294]

That is simply genius!!

[@Thesheddweller]

Hi, thanks for watching.

[@sushantbolinjkar3477]

Sir..... Marvelous engineering. I salute to your idea.

[@Thesheddweller]

Hi, thank you for your comments, I'm glad you enjoyed the video.

[@inbaaengineeringandtraders]

Is your own use. Or sale item. If you give price...Is really good but how is performance...?

[@Thesheddweller]

it works ok. see www.thesheddweller.com

[@Thesheddweller]

I would like to know how you get on with it, If you make one and modify it, it would be nice if you share with me. good luck.