A risky but quick alternate method that some machinists use for cutting larger pitch threads .
Пікірлер: 289
@MrTIGERH17525 ай бұрын
I suffered under the tutelage of an old German machinist, and at the same time I was taking machine shop in high school. Klaus, always used the method you just presented, so I dared not do anything else in his shop. My High school teacher always had us set the compound at 29 1/2 degrees. Neither man ever explained just why that threading was done the way it was. Both methods worked just fine for me, and I was never questioned by any one in the companies I worked for. ( I think I was the only kid who was trusted to cut threads on valuable work pieces) At University, the machine shop teacher noticed me using your described method, and muttered something about a " Bad European influence" that I never understood. But again, I always got to thread the more important projects we built for the school. It was only a few years ago, after watching lots of different people cutting threads, on KZfaq, that I did notice the difference in compound settings, And sure enough European, and Common Wealth machinist used your compound set at 90 degrees. Previously I had only cut multi lead threads, by using the compound set as you have shown. I liked that method, as I could always fudge a bit and always got a perfect fit, something that was not always easy to obtain. I used to think I was a pretty great machinist, but after watching some of the folks on KZfaq, I look like a rank armature, even after almost 60 years of working in machine shops, including mine!!! So, I'm an old dog, who can still learn new tricks!!! LOL!!! I have to laugh, seeing you working in shorts, and talking about 40 degree C heat. I'm in Central California, and freezing in 40 degree F cold!!! LOL!!! I never liked being cold, and when I was in the Air Force, I was always getting stationed in very cold places, Like Colorado, Idaho, and New Jersey. The older fellows never understood why I always volunteered for SEA duty ( South East Asia). I remember the Snake river in Idaho, freezing solid in the winter of 1972. It was minus 60 degrees F at night, and warmed to minus 40 degrees F, for a day time high. There was never that much snow, but it was blizzard conditions a lot of the time. When the wind stopped blowing, and the sun was out, you could get sun burned in below zero F. That beautiful blanket of snow reflected the sun at all kinds of different angles, and radiantly cooked what ever flesh was exposed. I enjoy your presentations, thanks again for all your efforts, they are appreciated!!! Tim
@swanvalleymachineshop5 ай бұрын
Thanks . Sounds like you were taught the best of both worlds . 👍
@hersch_tool5 ай бұрын
Both of these methods are doing exactly the same thing, moving the cutting tool "forward", roughly 1/2 of the distance moved into the work.
@chrisstephens66735 ай бұрын
I think thing that is missing from this conversation is whether the cutting tool is hand ground HSS or whether a full form threading insert is used. Clearly as rake is included on both sides of a FF insert it is intended to cut on the back edge as well as the front, while a hand ground one, being a form tool, needs some assistance from a top slide on the larger pitch threads. Or am I missing the point?😉
@jayreiter2684 ай бұрын
@@chrisstephens6673 You missed that it was long known that plunging directly into the thread produced a poor thread and overloaded machines. Some now unknown machinist thought "always cut toward the spindle bearing". I
@chrisstephens66734 ай бұрын
@@jayreiter268 that is where you have been misinformed, many yesrs ago I tested that very myth. I cut samples going straight in and flank feeding using the same single pitch full form insert on some 303 stainless and even under a microscope you could not tell which was which. There will be occasions when flank feeding is an advantage, flimsy machines or extraordinarily coarse threads but the myth you have to do it all the time is busted. I have not done the same test with a hand ground form tool but even then it is classically taught to take a spring cut plunging to remove any steps in the flanks. I subject is becoming more and more irrelevant these days as people in the know are removing their top slides altogether in the pursuit of increased rigidity and can then only do plunge threading.
@ianpendlebury37045 ай бұрын
A good-to-know technique that I have never heard of. Thanks Max.
@swanvalleymachineshop5 ай бұрын
Thanks 👍
@jonedmonds16815 ай бұрын
Supprised no-one on KZfaq has shown this method, especially useful to hit numbers when you have dro on cross slide, but not on compound.
@swanvalleymachineshop5 ай бұрын
I only know of one other person , Curtis from CEE that does it on YT .
@richardmills650518 күн бұрын
Ive seen Curtis over at CEE and wondered what he was doing. This explains it cheers Max
@swanvalleymachineshop17 күн бұрын
No worries 👍
@rickherrell94515 ай бұрын
Another great example of Trigonometry in machining. Moving the compound half the distance of the infeed is in reality creating the same thing as a 30 degree angle cut with just the compound...BRILLIANT!
@swanvalleymachineshop5 ай бұрын
Thanks . My maths teacher used to continually hit me over the head with a 2'' thick text book ! 👍
@jasonhull57125 ай бұрын
Absolutely lovely threads. And cut like a true Jedi Lathe master Machinist ! ☝️👍🏻
@swanvalleymachineshop5 ай бұрын
Thanks 👍
@robdixon9459 күн бұрын
Thanks for the show Max 🍻
@swanvalleymachineshop8 күн бұрын
No worries 👍
@sharkbaitsurfer2 ай бұрын
Not criticising your technique as I've wrestled with setting the 29-29.5 degree compound angle and my compound has heaps of backlash, so this technique is a gift. Not trying to be picky, given that you're using 20 thou DOC on each pass, if you go to 11 thou on the compound to every 20 thou on the cross slide you'd be hitting 28.8 degrees. Great video and HUGE thank you Subscribed.
@swanvalleymachineshop2 ай бұрын
No worries , Cheers 👍
@hersch_tool5 ай бұрын
This works great because it's doing basically exactly what you're doing when setting your compound to 29.5. The sine of 29.5 is ~.49, which is close enough to .50. Great vid as always!
@chrisarmstrong81985 ай бұрын
Since the top slide is operating at 90 degrees to the cross slide, the angle that Max is achieving is actually arctan(0.5) = 26.6 degrees. To approximate 29.5 degrees the ratio of top slide to cross slide movement should be tan(29.5) = 0.566.
@swanvalleymachineshop5 ай бұрын
It is an easy ratio to use . Just leave enough for a couple of straight plunge finishing cuts . 👍
@blitzkrueg075 ай бұрын
My milltronics cnc lathe offers 4 ways to have the lathe cut the threads. one was the way you just mentioned. i didn't know why one would need to do this till you mentioned the heavier threads. now it makes perfect sense. thank you
@swanvalleymachineshop5 ай бұрын
Thanks . Yes the CNC's have some interesting tool paths when it comes to threading . Never used one , It was NC & typing computer cards when i was at tech school & peg board control lathes at work , but we were not allowed any where near them as apprentices ! Back in 1982 . 👍
@appalachianbushcraft39595 ай бұрын
Really like your videos, becoming one of my favorite channels to watch! I'm from the states and I too keep compound at 29 degrees all the time. However, I think I'll try setting mine up like your just to see how it works out.
@swanvalleymachineshop5 ай бұрын
No worries , thanks . 👍
@tomsing63845 ай бұрын
Vary helpful, I like the shot of the part being cut and as well being able to see you working the magic on the hand wheels, thanks for showing everyone who has an internet connection the right way to make chips.
@swanvalleymachineshop5 ай бұрын
No worries 👍
@Randysshop495485 ай бұрын
Another great bit of info as you never know when an machining operation will give trouble. Thanks again Max Cheers
@swanvalleymachineshop5 ай бұрын
Thanks 👍
@HaxbyShed4 ай бұрын
Hi Max, I wish I'd watched this before my last project. I got away with straight in cutting 5tpi but there were indeed some 'dramas'. I perhaps listened to people who said "I only ever go straight in" but recent events have taught me that's not necessarily good advice. My default is now to go in with the top slide angled. Cheers Paul
@swanvalleymachineshop4 ай бұрын
5tpi is way too much for a straight plunge , no wonder you had issues . Do you have it on video , i am a couple behind in your grinder series . 👍
@HaxbyShed4 ай бұрын
Hi Max, I will send you an email about it. Cheers
@lonniebrock32825 ай бұрын
Another high caliber job good one Max
@swanvalleymachineshop5 ай бұрын
Thanks . Just another option . 👍
@smusselman15 ай бұрын
Great video Max! I have really been enjoying your content, as I only found your channel recently. Angled infeed is more common on conversational or CNC equipment with full form threading inserts in my experience. It's great to see you emulate that on the manual lathe! G'day from Alberta, Canada - the land of API pipe threads and frozen faces. Cheers 🍻
@swanvalleymachineshop5 ай бұрын
Thanks . I believe it's minus 40 over your way , we have a week of plus 40 !!! 👍
@smusselman15 ай бұрын
@@swanvalleymachineshop Yes sir, winter has finally arrived. -37°C this morning, feels like -45°C with the wind chill.
@a-k-jun-15 ай бұрын
Glad I decided to stop by today, I learned a new threading trick, Thanks
@swanvalleymachineshop5 ай бұрын
Cheers . It's a good method but real easy to stuff up until you have done it a couple of times ! 👍
@DudleyToolwright4 ай бұрын
Interesting technique, one I haven't seen before. Thanks for sharing, Max.
@swanvalleymachineshop4 ай бұрын
No worries Rob . Cheers 👍
@joecookesr.73964 ай бұрын
Thanks for the knowledge Max. It's always good to be aware of different ways to accomplish a desired result. Stay cool down under!😅
@swanvalleymachineshop4 ай бұрын
No worries . We have another week of 40's ! 👍
@hmw-ms3tx5 ай бұрын
Good tutorial Max. I remember David Wilks using that same set up, but with a different technique, to cut multi-start threads. I usually thread with the compound at 90 but just plunge in. For most pitches my lathe is rigid enough that I can do that. I'll keep your method in mind if I cut some large threads and have problems with vibration. We have a windchill of -40 C right now. No shorts for me. Ken
@swanvalleymachineshop5 ай бұрын
Cheers Ken . Yes , the compound is the easiest way for multi starts . Esp , like Dave was doing 5 starts ! Don't worry , the shorts only come out when the temp hits 40 ! 👍
@dcraft12345 ай бұрын
Good info. Hope Josh sees this!
@swanvalleymachineshop5 ай бұрын
Never know ! Pretty sure it would have made it easier for him . 👍
@donotwantahandle11114 ай бұрын
I hear his Aussie accent and I click Like!
@swanvalleymachineshop4 ай бұрын
Thanks 👍
@philmurray13595 ай бұрын
Great video. I ŵas just commeting on @topper machining llc video on threading.you made it so much clearer
@swanvalleymachineshop5 ай бұрын
No worries 👍
@jamesdavis80215 ай бұрын
I just found your channel. I never thought about doing it that way.Great idea
@swanvalleymachineshop5 ай бұрын
Cheers 👍
@howder19515 ай бұрын
The machinists at the steel mill would normally do a carbide insert tool straight in for the whole thread and were usually successful and quick about it. I try both methods here and there, but typically I am random on the cross slide, just to clean up the right flank a little. Not as precise, but it is a hobby shop for me. Enjoyed the vid, cheers Max!
@swanvalleymachineshop5 ай бұрын
Thanks . 👍
@outsidescrewball5 ай бұрын
thanks Max, never seen this before, but will remember as needed
@swanvalleymachineshop5 ай бұрын
No worries Chuck . 👍
@theoutbackshed5 ай бұрын
Another well made and informative video. Thanks Max.
@swanvalleymachineshop5 ай бұрын
No worries 👍
@DavoShed5 ай бұрын
I was taught this method of screw cutting as standard at TAFE back in the 1980’s. Using the compound slide at 30 deg was never even mentioned. I notice that popular machinist like Kurtis from Cutting Edge Machining also do it this way as standard. Personally these days, I usually offset the compound. Makes a lot more sense.
@swanvalleymachineshop5 ай бұрын
I was there in the early 80's as well ! Can not remember what methods they taught as i was screw cutting on lathes a couple of years before my apprenticeship . 👍
@bruceanderson94615 ай бұрын
Very interesting! Never thought of thread cutting this way. I will tuck it away for use someday.
@swanvalleymachineshop5 ай бұрын
No worries 👍
@johnwilleford77155 ай бұрын
Good information, I appreciate you sharing. Sorry it's warm where you are at. It's 4f with snow and - 13f wind chill.
@swanvalleymachineshop5 ай бұрын
Thanks 👍
@mcgama885 ай бұрын
Hello Max and channel. Nice to see your summer as outside temp was -23C last evening here and forecast as to stay for most of the week. At my study, I'm watching from warm comfort and enjoying your kind lessons. I am working to improve my techniques and tool selection. Regards. McGary
@swanvalleymachineshop5 ай бұрын
Thanks . We have a week of 40 C ! 👍
@453421abcdefg123455 ай бұрын
That is a very interesting method, it was quite clear from the close up shots that the tool was cutting entirely on the leading edge, and no rubbing cut was present, I think you could have missed out the last 2 spring cuts and had a tighter thread fit, as you say, another bit of knowledge to keep for future projects that may require this approach. Many thanks for posting! Chris B.
@swanvalleymachineshop5 ай бұрын
Thanks . Being just a thread cutting procedure demonstration I did not worry too much about thread fit , just went straight for Maximum DD for the 12 tpi thread profile to save a bit of dicking around . Cheers 👍
@453421abcdefg123455 ай бұрын
@@swanvalleymachineshop Yes I realise that would be the case, no point in keep on pulling of you tailstock to check fit for a demonstration, nothing worst than pulling everything back of and finding the thread is tight. A good demonstration. Chris B.
@cpcoark5 ай бұрын
Never saw that method before. Thank you for sharing - USA
@swanvalleymachineshop5 ай бұрын
No worries 👍
@alungiggs5 ай бұрын
Good one. Something I didn’t know. Thank you Max. 👍🇳🇱
@swanvalleymachineshop5 ай бұрын
No worries 👍
@Rustinox5 ай бұрын
This is the methode we see Kurtis from CEE use also. It works very well.
@swanvalleymachineshop5 ай бұрын
Same Rusty . Cheers . 👍
@howardosborne86475 ай бұрын
Nice demo,Max. I was taught both compound set at half angle and this method as an apprentice both in work and at technical college. The rule of thumb for ratio was roughly 30% to 50% of compound slide advance to cross slide infeed depending on the helix angle and thread depth,this requires a bit of experimentation but you soon get a feel for what is going to work for various thread forms. Also taught not to bother too much on shallow/fine thread forms as simply infeeding with the cross slide will produce a good thread,especially when using full form carbide inserts.
@swanvalleymachineshop5 ай бұрын
Thanks . Over 8 tpi or under 3mm , i just plunge straight in . 👍
@chrisjh7775 ай бұрын
Great tutorial. I like it. Will be using this method in the future.
@swanvalleymachineshop5 ай бұрын
Thanks 👍
@MachiningandMicrowaves5 ай бұрын
I use this approach for threads of more than 2 mm pitch, but I work out a desired chip load/DOC, so I usually do less than the expected 50% move on the compound. The argument in favour of doing this rather than a straight-in cut is that my 40 year old Colchester 1800 has a bit of carriage backlash, so biasing the cut to ensure the leadscrew is under compression in the direction of travel is a good way to prevent chatter. To complicate things, I usually cut threads in reverse away from the chuck, with the tool behind the workpiece, so the cross-slide is moved towards me and the compound is moved away from the chuck. I often do plain finishing cuts away from the chuck as there's less wear on the back face of the leadscrew and gears and I get a slightly better surface finish. Or I might be imagining things! Great stuff Max.
@swanvalleymachineshop5 ай бұрын
Thanks . I have only used a rear tool post for parting . I think i would wind something the wrong way for sure with a rear post & opposite threading !!! 👍
@grntitan15 ай бұрын
@@swanvalleymachineshopIt would definitely require a rewiring of the brain. I’m at the age where that would be a monumental task. 😂
@Timmays4 ай бұрын
I like it! Cuts very nicely and easy to operate. Great job! Now, go buy some pants. Those toothpicks you're standing on could get injured in the shop.
@swanvalleymachineshop4 ай бұрын
Thanks . Lol , the toothpicks only come out when the temp gets to 40 deg C ! 👍
@jdmccorful5 ай бұрын
Thanks for the idea. Nice work!
@swanvalleymachineshop5 ай бұрын
No worries 👍
@Thebowber4 ай бұрын
This is the only method I've used, I came up with this as an apprentice when I thought how stupid the angled compound was. This method means you keep track of the depth cut and is also good if you have to meet a fixed stop point with very little runout.
@swanvalleymachineshop4 ай бұрын
Thanks . Makes it easy to pick up the thread again if the tool should move or get damaged . 👍
@greglaroche17535 ай бұрын
Surprising to see someone in shorts when there is snow on the ground and below freezing here. Watch out for those hot chips. Thanks for the video.
@swanvalleymachineshop5 ай бұрын
Lol , they only come out when the temps hit 40 ! 👍
@andrewmatthews46774 ай бұрын
Good video, I gave away swinging the topslide round in about the third year of my apprenticeship, the width at the bottom is easily obviated by always taking slightly less than half. Cut hundreds of threads like that quickly and easily in everything from aluminium through to Ledeburitic tool steel.
@swanvalleymachineshop4 ай бұрын
Cheers 👍
@DavidKutzler5 ай бұрын
The first time I ever saw this method used was by another Aussie Machinist, i.e., Kurtis on his channel Cutting Edge Engineering. I'm a hobby machinist, who took a class in machining to get started, and was taught the traditional method with the 29 1/2 setting on the compound.
@swanvalleymachineshop5 ай бұрын
Thanks . If you are doing finer threads , just plunge straight in . Compound in line with bed . This way makes it easy to pick up the thread again if you have to remove a tool or one breaks . 👍
@peterhawkins46123 ай бұрын
The only time I cut threads using any other method than what you just demonstrated was at Tafe college.
@swanvalleymachineshop3 ай бұрын
No worries 👍
@theoldstationhand5 ай бұрын
Good one Max, that's my preferred method as I'm generally too lazy to swivel the compound and, saves me having to set the tool square to the work! 🙂
@swanvalleymachineshop5 ай бұрын
Any which way ! Cheers 👍
@ypaulbrown5 ай бұрын
Max, this sure would have helped Josh Topper last night on his job you watched yesterday......thanks for showing this technique, Paul
@swanvalleymachineshop5 ай бұрын
I am sure it would have . There are always methods we have forgotten or don't know ! Cheers 👍
@jacobpace47165 ай бұрын
Beauty.. thanks Max!
@swanvalleymachineshop5 ай бұрын
No worries 👍
@trevorjones24735 ай бұрын
I have this niggly feeling that Max knows what he is talking about!.
@swanvalleymachineshop4 ай бұрын
Lol , Cheers 👍
@jimsvideos72015 ай бұрын
Another tool in the box, thank you Max!
@swanvalleymachineshop5 ай бұрын
Cheers 👍
@user-fc5bd8iy4m2 ай бұрын
Look ma i learn something new.........it all makes sense now with the tool pressure......and no its not all American way of leaving the compound turned, im still a newbie, but through the 3 lathes i have already owned i seen quite quickly how much rigidity i would loose on my smaller lathes with it kept at 29.5 degrees, so i keep my cross turned like yours all the time except threading, but now i know another way and im dying to try it , thanks max😊😊 i sure wish i lived next door to you , id be like the bad neighbor wanting to borrow a cuo of sugar except id be asking " hey max you wouldnt happen to have a foot or two of uuuummmm 4140 i couod borrow"........lol
@swanvalleymachineshop2 ай бұрын
Lol , cheers 👍
@edsmachine935 ай бұрын
Nice work Max. Happy New Year to ya. Have a good day.
@swanvalleymachineshop5 ай бұрын
Thanks . Have a good one as well ! Cheers 👍
@Warped65er5 ай бұрын
Great vid. Learned something new.
@swanvalleymachineshop5 ай бұрын
No worries 👍
@CliffsShed4 ай бұрын
Brilliant camera work Max, I'm looking forward to getting back on the lathe! ATB, Cliff
@swanvalleymachineshop4 ай бұрын
Cheers Cliff . 👍
@socaldevin5 ай бұрын
Excellent use of a slow motion shot!
@swanvalleymachineshop5 ай бұрын
Thanks 👍
@jefftheaussie22255 ай бұрын
Max, I suppose that means your root will be rooted. Thanks for slipping that in indeed. Jeff.
@swanvalleymachineshop5 ай бұрын
Surprisingly easy to root your root ! 👍
@MattysWorkshop5 ай бұрын
Thanks Max, I’ll try this out soon. Cheers
@swanvalleymachineshop5 ай бұрын
No worries Matty 👍
@frankerceg43495 ай бұрын
Thank you Max!
@swanvalleymachineshop5 ай бұрын
No worries 👍
@AquaMarine10005 ай бұрын
I used this method on a big Mazak with a good spindle brake. At the end of each cut, hit the foot brake and retract the tool simultaneously, into reverse, new cut and repeat. A couple of mimutes later at 350 rpm and five cuts all done. Material H13 tool steel hardened to 52 Rockwell C. The thread finish looked ground, just beautiful like it was cut on a CNC. Cheers.
@swanvalleymachineshop5 ай бұрын
Hey , no worries . I have a 21'' lathe that is a Mazak copy ! 👍
@AquaMarine10005 ай бұрын
@swanvalleymachineshop The biggest diameter in the Mazak was 510 mm x 450 mm long, being one half of a plastic injection mould for the eleven litre icecrean parlour tubs. We produced injection moulds for thin wall food containers and plant pots large and small. At the time circa 1980s, the lathe had Sanyo electronic read-outs. Also, as an attachment, a Minic hydrolic profile tool tracer. The lathe had power and accuracy. I pushed that electrical amp gauge to the max when shifting metal. Thanks for bringing back some great memories. Cheers
@swanvalleymachineshop5 ай бұрын
@@AquaMarine1000 My one is a Chinese copy , JFMT 530 x 2000mm with rapids . The machine manuals are all Mazac copies .
@paulcurtis27795 ай бұрын
Wow that was cool and a perfect result. . Amazing.
@swanvalleymachineshop5 ай бұрын
Thanks 👍
@eyuptony5 ай бұрын
That cut nice Max. Good to know. Thanks Tony
@swanvalleymachineshop5 ай бұрын
Cheers Tony . 👍
@stevechambers91665 ай бұрын
Great tip I do it like that all the time but only a very small compound move never realised could move it half the in feed till your really close to size thanks max
@swanvalleymachineshop5 ай бұрын
1/2 is about the limit otherwise things turn ugly . Still have to leave a small amount for a couple of light finish cuts , straight plunge in . But you do that anyway with the angled compound method as well . 👍
@zoltannagy18135 ай бұрын
I used to use this method many years ago when I was a machinist. This was to avoid the tool cutting on all edges at once. Back then, we didn't know about the compound at 29 degrees method.
@swanvalleymachineshop5 ай бұрын
Cheers 👍
@jayreiter2684 ай бұрын
Thanks for this explanation. I have watched Kurtis use this method. It took several videos for me to notice him bump the cross feed. he seams to do this by feel. He also threads without releasing the half nut as many do when left hand threading.
@swanvalleymachineshop4 ай бұрын
No worries . I think he does a lot of threading imperial on maybe a metric leadscrew , hence you have to stay engaged for the return trip . 👍
@honeycuttracing5 ай бұрын
Thanks for your great knowledge, as for the weather, it's snowing and it's 31°F and no power, and we're still forecasted 6°F lows 🥶🥶🥶🥶🥶🥶 which isn't normal for where we are in USA but we're really looking forward to summer here lmfao 😂
@swanvalleymachineshop5 ай бұрын
Wow , that sucks with no power . We get a lot of small power cuts here with the hot weather , everyone has their air con on ! 42 deg C , 107 F today ! 👍
@FactoryDragon875 ай бұрын
I have use this method since I learn up a single-point-thread-cutting and I still use it. To deal with compaund adjusting to 29 (29,5) deg and back to 0 zero is quite a struggle. Through practicle I noticed that up to 2...2,5mm thread pitch no need set compaund in 29 deg. Nowdays carbide tooling goes easy. Good luck!
@swanvalleymachineshop5 ай бұрын
Cheers . Yes , some lathes the compound graduations are not for counting back from 90 . 👍
@1ginner15 ай бұрын
Hi Max,, been doing it this way all my working life, works for me, I do take a last cut on the back flank to get a decent finish, it widens the profile a smidge but I've had no issues. Best wishes, Mal.
@swanvalleymachineshop5 ай бұрын
Thanks . Yes , i do a couple of straight in feed cuts for that reason . I have one i may be doing . 6 feet of 2'' UNC , no steady rest ! That should put the cat amongst the pigeons ! 👍
@1ginner15 ай бұрын
Oops , that should be fun. lol @@swanvalleymachineshop
@johnlee82315 ай бұрын
Thx Max hadn't seen that one before.
@swanvalleymachineshop5 ай бұрын
Lots of different methods ! 👍
@ypaulbrown5 ай бұрын
looking Spiffy in your summer gear Max, cheers from he other 'Sunshine State', Florida, Paul
@swanvalleymachineshop5 ай бұрын
Lol , thanks 👍👍👍
@HuFlungDung24 ай бұрын
If you have a DRO on your lathe, you'll be loathe to have the compound set at 29 degrees because any movement there screws up the DRO setting. When you make your living doing this, you tend to do what is most efficient, and a 90 degree setting is most efficient. Plus carbide inserts don't like a scraping cut on the back side, this will chip the edge that you're not even using! Laydown thread inserts are wonderful tech. They easily form two chip curls without a problem of interference. If you can keep the speed up, the finish is excellent.
@swanvalleymachineshop4 ай бұрын
Cheers 👍
@ianmoone23595 ай бұрын
Yep great to see another learning opportunity Max. And sporting your lucky legs no less! 😜😂😂 Can’t say as I blame you it’s been beyond hot these last couple days, & a great time for the air con to go on the fritz. 😳😳😢 Keep up the good work mate.
@swanvalleymachineshop5 ай бұрын
Cheers Ian . 👍
@northernmetalworker5 ай бұрын
An excellent machinist trick.
@swanvalleymachineshop5 ай бұрын
Thanks 👍
@bodgit19644 ай бұрын
This is the way I always cut a thread because of two advantages. Firstly sometimes the thread is a little tight because although you are to depth the tool isn't quite at the right angle. If this is the case you can give the top slide a little nudge and it often sorts out the problem. Second, when turning stupidly coarse threads you can cut to half depth and then cut to width with the top slide and then return to the start and cut to full depth. using that system I once cut a 4 tpi thread on a 3 1/2 Drummond driven by a treadle. I was a lot fitter back then!
@swanvalleymachineshop4 ай бұрын
Thanks . Not sure if i would want to do it on a treadle lathe though ! 👍
@terryberggren91245 ай бұрын
It is winter here we have been in sub zero weather - 20deg F all this next week about zero . I will have to try that threading method sometime
@swanvalleymachineshop5 ай бұрын
Thanks . About 5 deg C would be our coldest on average . 👍
@tonywilson47135 ай бұрын
Great vid mate
@swanvalleymachineshop5 ай бұрын
Thanks 👍
@tonywilson47135 ай бұрын
@@swanvalleymachineshop No probs I am actually an engineer who works in industrial control systems and automation. I see the decline of Australia's skilled trades as a NOT only a disgrace but also something it might take a decade or more to recover from. We will need to build 5-10 major power stations in Australia over the next 10 years and by major I mean each one being as big as any we have ever had. I hate the discussion on nuclear power NOT because its wrong but because the WRONG PEOPLE are speaking. They not only confuse many people but they don't address the elephant in the room which is our skill base. The mining boom showed we had a problem and NOTHING has been done. In my line of work I work with machinists, sparkies and welders SO I KNOW their value and the shortages we have. What I like about people like you is you are preserving the skill sets we desperately need and the biggest part of the problem I see is that not only we we waste 20+ years of NOT training people but we also in that process LOST the next generation of people who can teach these skills. That's my giant concern. Who's going to tech the next generation of skilled tradesmen? If you think I'm wrong let me know.
@bombardier3qtrlbpsi5 ай бұрын
Nice job 👍
@swanvalleymachineshop5 ай бұрын
Thanks 👍
@MyLilMule5 ай бұрын
I've noticed that Kurtis from CEE uses this method frequently and I often wondered what he was doing.
@swanvalleymachineshop5 ай бұрын
Now you know ! Cheers Greg 👍
@dotgirl101014 ай бұрын
That method is how I cut all threads.
@swanvalleymachineshop4 ай бұрын
Cheers , it has been around for along time . 👍
@RalfyCustoms5 ай бұрын
G'day Max, looking very dapper there in ya shorties mate 👌 Thanks for this video mate, I was actually thinking about this the other day, watching screw cutting videos, the majority dont use the compound nowadays, I figured it had become outdated somehow? Thanks for sharing 👍
@swanvalleymachineshop5 ай бұрын
Not out dated Mate , just ones just a different method that can save a lot of time . Esp if you do not want to upset the location of your tool post . The shorts only come out when the temp hits 40 ! 👍
@RalfyCustoms5 ай бұрын
To be fair you rock the shorts 😂
@MuzzahA15 ай бұрын
Thank you.
@swanvalleymachineshop5 ай бұрын
Cheers 👍
@WayneEdmunds605 ай бұрын
thanks Max good to know
@swanvalleymachineshop5 ай бұрын
No worries . Just be careful , it may take a couple of goes to get the hang of it ! 👍
@robbvk6es26 күн бұрын
Never did understand why the yanks prefer the offset compound infeed. Having the compound permanently offset means you can't use it to accurately set a shoulder length and then have to introduce a dial indicator in it's place. Direct infeed method is also much easier when chasing a damage thread.
@swanvalleymachineshop25 күн бұрын
It's just the way they have always done it i guess ! We were taught the English methods . 👍
@paulsotheron7104 ай бұрын
👍 Looks good.
@swanvalleymachineshop4 ай бұрын
Thanks 👍
@graedonmunro17935 ай бұрын
enjoyable!!! cheers
@swanvalleymachineshop5 ай бұрын
Thanks 👍
@Preso585 ай бұрын
I have used that method on internal threads. The only issue I have is keeping track of the feed depth between retracts. Using both the absolute and incremental on the dro helps though. We're you using a full form insert?
@swanvalleymachineshop5 ай бұрын
Full form insert , but for a larger pitch . Switch the DRO off Preso & just use the compound dial . Mark the dial with chalk , that's what i was taught ! 👍
@davidrule13355 ай бұрын
I feed straight in anyway with no issues. My 1943 Machinist hand book says that's A-Ok on 4-tpi or smaller. It does mention,(and I'm the first person on the interweb, pointing this out). Setting the compound and feeding in with it, does load 1/2 the cutter, but that's to take up the gear train slack. Plus I know it's hot down there. And I wear shorts year round. MI have a body shop that stays at 80 deg. f or 60 deg. C? year round. However those short shorts are gayer than gay. I you look ou Gay short pants in webster, that picture will show up. js I'll look around your channel and may subscribe.
@swanvalleymachineshop5 ай бұрын
Lol ! No ass less chaps or leather caps here !!! 👍👍👍
@patrickbeaumier86165 ай бұрын
Thanks 👍👍👍
@swanvalleymachineshop5 ай бұрын
No Worries 👍
@ThePottingShedWorkshop5 ай бұрын
I guess you watch Josh Topper as well then! An extra benefit of having the compound parallel to the axis would be to make it easier to pick up the thread again if the toolpost slips or you have to mess with the tool before the thread is finished.
@swanvalleymachineshop5 ай бұрын
Exactly that . Also easy to chase damaged threads . 👍
@johnspathonis10785 ай бұрын
Hi Max Another great video. If you had a much more rigid lathe, would you do a straight plunge cut? Love the shorts just like mine. Cheers
@swanvalleymachineshop5 ай бұрын
Not really , it depends on the job . About 8tpi or 3mm pitch .is where i stop doing a straight plunge cut . 👍
@johnspathonis10785 ай бұрын
Thanks for the info and stay cool (from hot and humid QLD).@@swanvalleymachineshop
@brockstravels75865 ай бұрын
Now that is a NUT...
@swanvalleymachineshop5 ай бұрын
Lol . Hard to see if i used a small one ! 👍
@tas32engineering5 ай бұрын
Leading edge is all about thread cutting. Big hydraulics require threads capable of withstanding assault that can reach forces . Maxy whips one out with scant regard for material discomfort . Machines are mentioned to be time savers. Not heart brakers.
@swanvalleymachineshop5 ай бұрын
Thanks 👍
@janvanruth34855 ай бұрын
and if one uses a hss tool one can grind it with a side positive rake, getting the nicest chips and cleanest cut possible.
@swanvalleymachineshop5 ай бұрын
Yes , no worries there . But keep it to a minimum as the trailing edge will have a negative rake angle . Main thing is to have a enough side clearance to allow for thread lead angle . 👍
@tomeyssen96745 ай бұрын
Knocked me over with a feather😂. Full triangle to half triangle....never thought of it...enjoyed as usual...cheers!
@swanvalleymachineshop5 ай бұрын
Thanks 👍
@tomsing63845 ай бұрын
I was wondering with those summer shorts you have on, do Australian snakes jump?
@swanvalleymachineshop5 ай бұрын
Not sure , i jump first ! 👍
@stovepipe6665 ай бұрын
Nice one max send over some of that sun when your finished with it 😂
@swanvalleymachineshop5 ай бұрын
I have finished with it ! Cheers 🍺🍺🍺
@thomassutrina82964 ай бұрын
Good easy approach since the Tangent of 30 degrees is 0.577, darn close to 2:1. Where 29.5 degrees is 0.566. the compound angle to get 2:1 is 26.55 degrees.
@swanvalleymachineshop4 ай бұрын
Thanks 👍
@acmemachining5 ай бұрын
Hey it's 40 to 41 here also. Darn I forgot the minus sign. Great information Max. I could mail you a bottle of cold air. You could enjoy it and send it back with hot air. Would that cure the problem?😂
@swanvalleymachineshop5 ай бұрын
Lol , our thermometer does not go down that low . 👍
@willemvantsant51055 ай бұрын
Hi Max, nice free cutting instead of forcibly displacing the metal, I think Josh had a clearance issue with his travelling steady and compound.
@swanvalleymachineshop5 ай бұрын
Yes , a bit tight for room . But there are always ways around that ! 👍
@willemvantsant51055 ай бұрын
@@swanvalleymachineshop I felt sorry for his Lathe, wincing in pain but liked the hardened points on the 3 legged travelling steady, only seen bronze or rolling element bearings.
@fasteddie87825 ай бұрын
Thanks for the information I never I always wondered how screws were made in the threads the automatic feed... Alo to fuckin know forsure..
@swanvalleymachineshop5 ай бұрын
No worries 👍
@leonelalaniz1755 ай бұрын
Thought this was common practice. I'm farther ahead then you think.
@swanvalleymachineshop5 ай бұрын
Yes , just not shown on YT . CEE would be the only other channel i have seen it . A lot possibly depends if you learnt from a European or an American background . 👍