MACHINE SHOP TIPS #160 Making Eccentrics for Steam Engines Logan lathe tubalcain

  • Published on Apr 27, 2014
  • Go to my website-
    Tubalcain shows 3 methods for turning eccentrics on the lathe.
    Eccentrics actuate the spool or slide valves on model steam engines.
  • Science & TechnologyScience & Technology

Comments • 234

  • c&t trkn
    c&t trkn 2 months ago

    From a loyal follower I know you ain't making space shuttle parts ignor the trolls Haha always enjoy and learn something from you
    And I hope you are around long enough to use two dozen . You are an eccentric feller in a good way.

  • joe barker
    joe barker 3 months ago

    Wish i had you as a teacher back when i took shop in high school you have a very straight forward way of instructing and watching your videos is a peaceful escape for me keep the videos coming

    • mrpete222
      mrpete222  3 months ago

      Thank you very much, I'm glad you like the videos

  • RP Richard
    RP Richard 3 months ago

    I need to say this as an inspiration to you! I started machining in 1973. I’ve even taught engineers what certain machines can and can’t do for obvious reasons, and I can’t remember how many trainees I have taught. But darn it, I like watching you anyway! As any professional machinist knows, you’re always learning something new almost every day. I’ve learned a few neat things from you, so thanks for your insight. Keep it up my friend. 😉

    • mrpete222
      mrpete222  3 months ago

      Thank you very much that makes me feel good

  • highwatercircutrider
    highwatercircutrider 4 months ago

    Love your instructions ( I am a structural engineer trying to learn machining as a retirement hobby).....ignore the ‘trolls’..... Gary in Michigan

  • lacetmiel
    lacetmiel 5 months ago

    Thank you for your interesting and informative videos. I have puzzled for a long time over how to make eccentrics. Really enjoy and appreciate your posts.

  • K Gee
    K Gee 6 months ago

    Not only are you a good machinist, you are a good teacher too! Thanks again.

  • K Gee
    K Gee 6 months ago

    “We’re not splitting the atom here”. Can we do that next week?

  • Rusty Calvera
    Rusty Calvera 7 months ago

    well done...I like the nice close shots....good camera work.

  • libertarian life
    libertarian life 9 months ago

    Critics> LET ME AT "EM. "Illegitimum non carborundum", we love ya Lyle. "It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood; who strives valiantly; who errs, who comes short again and again, because there is no effort without error and shortcoming; but who does actually strive to do the deeds; who knows great enthusiasms, the great devotions; who spends himself in a worthy cause; who at the best knows in the end the triumph of high achievement, and who at the worst, if he fails, at least fails while daring greatly, so that his place shall never be with those cold and timid souls who neither know victory nor defeat." "Damn the torpedoes, full speed ahead." " I have not yet begun to fight". Words from guys who knew what the hell they were talking about.

  • Raymond Clark
    Raymond Clark 10 months ago

    Lovely video. Thanks again! Love your work.

  • lee underwood
    lee underwood 11 months ago

    You just saved me money on a 4 Jaw, I will use a 3 jaw with packing, Thank You Mr. Pete!

  • chrissd40
    chrissd40 Year ago

    You're the best MrPete!

  • Fabtech American made

    yea Mr pett just wanted to say I like your back drop your using iv stared useing one my self when I saw what you had going on there I really truley believe that it makes the work show up better with using an back drop me and my boy love the things you do one RU-clip keep up the good work he wanted to tell you we are starting to build our first steam engine he's been watching you Channel so he could get some good tips keep up the good work we love your Channel

    • mrpete222
      mrpete222  Year ago

      Did you like the backdrop behind the lathe? Or the green one on the bench. Thanks for commenting. I actually go to a lot of extra effort for that, and you are the first one to ever comment on it. Good luck with the engines. It is a wonderful thing you were doing with your boy

  • warren maker
    warren maker Year ago

    Hey Mr Pete,
    I know this is an old video, but here is a link to a free little computer widget that does all the calculation for you for offsetting a 3 jaw chuck for eccentric turning... supa accurate and supa fast.. Downloads in a few seconds. And thanks again for all the great videos.

    • mrpete222
      mrpete222  Year ago

      Thank you, I will check it out

  • Fernando Lichtschein

    When turning to a diameter sometimes it is not like the song... the last cut is the deepest. And you have to start over :)

  • Jay Robertson
    Jay Robertson Year ago

    You are a great teacher. Looking for a used lathe so i can play.👍

  • Kalle Klæp
    Kalle Klæp Year ago

    I'm at the beginning of making a flame licker engine. As I zapped through several videos for inspiring things, I came by your video. Knowing from other videos you've made that you are a very talented craftsman I simply had to see how you fabricate an eccentric. Thanks for sharing your knowledge and wisdom with us. I subscribed to your channel long time ago as there is always some useful tips and tricks for me to learn.

  • Jeffry Blackmon
    Jeffry Blackmon Year ago

    Thanks. As always, you have presented solid information. Happy 2018.

  • YT
    YT Year ago

    Love your work. Very good teacher. I can’t remember a statue erected to a critic.

    • YT
      YT Year ago

      mrpete222 No I do not.

    • mrpete222
      mrpete222  Year ago

      +YT you are wrong, there are statues of critics. Remember the song Statue of a fool!

  • Larry Hawkins
    Larry Hawkins Year ago

    Excellent information, thank you, enjoy all your videos.

  • aga
    aga Year ago

    1.5 is about half of Pi.

  • Richard hawkins
    Richard hawkins Year ago +1

    you are a good the best shop teacher :)

  • Peter Cunningham
    Peter Cunningham 2 years ago +1

    Thank You for another great presentation.
    I have the tools that I "inherited" when I bought this rural property here in country New South Wales in Australia.
    I do want to make model steam engines, which is why I asked the owner to leave me all the machines, - at a reasonable price.
    You are teaching me how to use the various machines and, just as important, all the various measuring tools,-micrometers, etc.
    SoI wanted to let you know that I really appreciate the way you take the time to explain everything clearly and at a pace that people like me can learn.
    The man I bought the property off was an engineer, just like yourself, and he used to say, that when he started out in his trade, if you wanted a special tool you had to make it, as there was no store bought tools in those days.( he was in his mid-70s when he sold up and moved back to the city area). as he became too ill, and failing eyesight, caused him to sell this rural property.
    He could make anything in his machine shop, but he was not a good teacher,-or I was not a good pupil, more like.
    I think it is a special gift that enables someone to teach as well as being able to do something.
    People for miles around used to bring things to him to be repaired, - especially their guns for new firing pins or to repair the sears,(I don't know if I have got that right) but, he used to talk about people not respecting a precision piece of engineering.
    Anyway, until now, I did not have the confidence to use the lathe or milling machine.
    So a big Thank You from me for all your work you do in putting together all these videos.
    Best wishes from,
    Peter Cunningham.

  • Randy Wilson
    Randy Wilson 2 years ago +1

    Always a pleasure to view your wonderful videos. When I run into something in the machine shop I have not done before I come to your videos for instruction and they never fail to educate me!

  • Robert Allnutt
    Robert Allnutt 2 years ago +2

    Thank you for an other wonderful video, you are a great teacher.

  • Zane Atkins
    Zane Atkins 2 years ago

    Thank you! great video

    JOHN DICKSON 2 years ago +2

    I am not a machinist and probably never will be. I am not qualified to critique this mans work but what I can say is I have just finishing video #160. I am using this as a method of learning how to use some tools I have recently purchased.
    What I am qualified to say about Tubalcain is this. A man that would spend this much time sharing his life time of knowledge with all of us is bound to be a special kind of person. Now he might be picking up a dollar some where in this but look at all the free wisdom he is raining down on us. His tools are the things he has accumulated down through the years but think of the lighting and camera equipment he has bought, they are dedicated to the production of his videos. Price some of this quality equipment. It is not cheap.
    I have an appreciation of skilled people. I have spent a life time of dealing with 20 year old that are not qualified to use a lawns mower, 30 year old collage grads that cant fill out a job app and sign there names due to a double standard where everyone has to pass and graduate just so they can feel good.
    I consider myself to be a knowledge sponge. I soak up everything. No information is too trivial. The only problem I have with Tubalcain is he lives too far away. I think he would make a great neighbor and friend. I hope to have the honor of meeting him some day. I am pretty sure we would have many deep conversations.
    NOW FOR ALL THE HATERS. Relax, take a deep breath and have happy thoughts. Don't be jealous of others. You are what you are and with time and practices you will get your GED and maybe someday you will own that lawn company, or at least have your own mower. One thing for sure, if smoking pot and spreading hate and discontent are your only goals that is about all you will ever have in life. Go ahead and hide behind that keyboard. You are not qualified to shine a light for Tubalcain to walk by.

      JOHN DICKSON 2 years ago

      I am on number 165 and looking forward to the rest. You are doing a great job and mush thanks.

    • mrpete222
      mrpete222  2 years ago

      Yes-- yes, practical experience. I learned more about teaching in 10 weeks of student teaching than the whole rest of my college classes.
      Glad to meet you. lyle

      JOHN DICKSON 2 years ago

      Mr. Pete, we are close to the same age and most younger people done understand the value of knowledge and education. I never went farther than high school but have a life time of world experiences. We have that in common.
      I am sure that you have a college education. Schooling is important but there are no substitutes for experience and at our ages we understand. All tho we have never met I consider you a friend and you would be welcome in my home anytime.
      I hope we meet someday, John Dickson
      P.S. Stay in touch.

    • mrpete222
      mrpete222  2 years ago

      Thank you very much for a kind and encouraging comment. I am humbled by it--I sent it to my daughter to read.
      I don't get a lot of bad comments, but some are hurtful--and I never respond to the trolls. keep watching, lyle

  • Juan Smit
    Juan Smit 2 years ago +1

    would there be a way of making them with out machining for those who do not have a lathe ? just a drill press and some hand tools . could you make a video if possible . love your videos and have been subscribed for a long time and would like to make something with my daughter's thank you for your time . also do you or would you sell the small steam engins and Stirling . thank you for your time .👍👍👍👍👍👍👍👍👍

    • mrpete222
      mrpete222  2 years ago +1

      You could make an eccentric by soldering 2 pieces offcenter. None for sale

  • kandalfus
    kandalfus 2 years ago

    The last two tip suits me for my chuck I thank you sir

  • Kenneth Bartlett
    Kenneth Bartlett 2 years ago +1

    Thank you so very much. I am building a model engine and it requires my turning an eccentric. I was agonizing over how I was going to do it. Well this comes in the knick of time and I actually look forward to making one. Again, thank you very much....Ken

    • mrpete222
      mrpete222  2 years ago

      Glad I helped-Thanks for watching.

  • DrewLSsix
    DrewLSsix 2 years ago +1

    hmmm, wankle steam engine build? wankle is on my projects list but a steam powered version might be a wise early attempt 🤔

    ooh! or a rotary sterling engine!

    more on topic, is there any particular function an eccentric does that a crank doesnt?

    • mrpete222
      mrpete222  2 years ago

      I never made a wankle-an eccentric moves a small amount

  • Southern Outdoorsman
    Southern Outdoorsman 2 years ago +3

    work people like you do...almost magic

  • d ss
    d ss 2 years ago +1

    Gee I wish I saw this video when making eccentrics for 7 1/4 in tank loco! I didn't know you could do that with a 3 jaw chuck.

  • Paul Duffey
    Paul Duffey 2 years ago +1

    I have not yet turned an eccentric so thank you for the ideas. I was wondering if one might turn the smaller part as a separate piece and attach it to the larger diameter with bolts or silver solder. Would this work on a small model? Also I had noticed the green background and wondered about it as most vids just have a metal or wood table. The color certainly contrasts with the parts. Interesting. Thank you very much.

  • frank wolfe
    frank wolfe 2 years ago +1

    Thank you Mr Pete... I was kind of at wits end as to how I would make the eccentrics for my next project without having a 4 jaw chuck for my lathe... The formula Packing method is a life saver...Being retired and on a fixed income I don't have the immediate reources to buy the 4 jaw chuck...I wouldn't lose any sleep over negative comments... Anyone with a grain sense can figure out everything you so accurately describe easily...Even my wife likes your educational videos... I may be an old dog but I am still learning...Keep up the great work and take care...Canada loves your videos...Frank

  • Jimmie Porter At Stuart Arts

    Very helpful as this is just where I am with my engine build. Thanks!

  • pat dee
    pat dee 3 years ago +1

    Those that are dubbed "Trolls" are not always trolls. IE:
    NOT all "teachers" are good at all. Pete is NOT one of them. He is one of THE very best I have ever watched, both in videos and in schools of various genre' for almost 80 yrs.
    I see NOTHING wrong with critiquing a video, if the sound is bad and/or the video is bad. Worse is the VERY common practice of taking forever to say ANY thing; not to mention, those who take 90% of the video time engaging in NON necessary rhetoric before laying their hands on a tool or machine. I have left the following comment on a number of them like, "CUT to the chase man. Give us a break!"

    Most of you have seen this many times, not only on RU-clip; as well as all forms of academia. Some of them get adoring praise. But that does not change the fact that far too many do "over talk" any thing to death. "Echo" by not using a lavaliere type mic is very hard to listen to. Etc. Constantly moving the camera is VERY hard to watch. Yet VERY common on many videos.
    Again, Mr Pete is exemplary. I am sure that most of you would agree that he is truly unique. I would place him among the masters: Norm Abram and Peter Parfitt, just to mention two outstanding teachers. Sadly, MOST on RU-clip are NOT. I often commend and brag on those few that are like Mr Pete and the others mentioned above.
    I also critique those who make it almost impossible to watch; because of their lack of expertise in the art of teaching. That is not being a Troll. That is the way it should be. In a word, If one is going to make a "how to" public video, they should be able to take non-attacking "constructive criticism" as well as to be pleased when the comments are what they want to hear.
    I will sight just one example of what is to me; an atrociously common practice in MOST videos; and that is the incessant, hell-bent "MUST", to have that horrible music blaring in the background. I will say what I feel about it whether they like it or not. There are other things too. To me music has NO place when teaching technical things. I am not alone in this. Not to mention; lightning "FAST" cutting from scene to scene; so no one can concentrate on anything. "Pausing the video is NOT the answer to that. The answer is "DON'T DO IT!" Who needs it?
    Etc, etc and Etceterrrra!
    For whatever it's worth.

    • mrpete222
      mrpete222  3 years ago

      Excellent comments & analysis. HATE the music--I once asked if viewers wanted it on my vids--my tongue was in my cheek. I am also talking about commercial TV & movies. You can sometimes here the nusic from one cineplex box to other.
      Also, some commercial tv reality shows jump from scene to scene--its awful. I'm thinking of making a 10 pt series on how to make videos--but I hate to give some of my hard learned secrets.
      Thanks for the complements

  • tandem compound
    tandem compound 3 years ago

    really good ideas. you are a genius thank you

  • tandem compound
    tandem compound 3 years ago

    Tubal-- I am trying to make a eccentric for a tinypower w. Drawings are not clear if I make them two piece and weld or one piece as you did with the wobbly work, which frankly scares me. I am using steel, but only 2 inch dia. thanks

  • Rod Wyatt
    Rod Wyatt 3 years ago

    Great vidclip Very informative Thanks for taking the time and posting

  • Steve Leatherbarrow
    Steve Leatherbarrow 3 years ago

    Thank you for all your videos. Always enjoyable and full of interesting and good, no nonsense information

  • Dave Whitegas
    Dave Whitegas 3 years ago

    Great video. I was once thinking all the conventional machinists were becoming a thing of the past due to the CNC replacement operations. Lots of the younger fellas think CNC is the only way. I have made eccentrics and used the packing method, now I have a few more ideas. Thank you and God bless.

  • rene levesque
    rene levesque 3 years ago

    I already used your packing technique to turn a excentric cam but I assumed that since the bearing surfaces of the jaws have a radius ; I used 2 packing shims on two jaws instead of one so the grip isnt off centered on those two jaw radiuses

  • john ingardia
    john ingardia 3 years ago +1

    All right, here we go Lyle, just love that green back material. Just love it. All kidding aside; you do a great job.

  • Gary Schultz
    Gary Schultz 3 years ago

    Great info.... thanks

  • Joe G
    Joe G 3 years ago +1

    As usual, terrific video! You have inspired many including myself. I just drove 650 miles to purchase my first lathe. An Atlas 12" with lots of tooling!

    • mrpete222
      mrpete222  3 years ago +1

      +Joe Gassen and well worth the drive

  • Jay Philip Williams
    Jay Philip Williams 3 years ago

    You could also put the work piece in a three-jaw chuck attached to a rotary table on your milling machine. Center the piece, then offset the table in any direction by the appropriate amount. Then just spin the table one full revolution and you're done! I didn't read through all the comments, so someone may have already suggested this.

    • mrpete222
      mrpete222  3 years ago

      +Jay Williams Thanks for watching-good idea

  • Emgee Radian
    Emgee Radian 4 years ago

    Great video showing all methods.

  • David Leahy
    David Leahy 4 years ago

    That was very informative thank you for this.

    • mrpete222
      mrpete222  4 years ago

      +David Leahy Thanks for watching

  • Damien Fowler
    Damien Fowler 4 years ago

    Very poor finish on the brass.

    • Mark Allmon
      Mark Allmon 4 years ago

      +Damo Floyd She ain't gotta be a beauty queen to ge the job done. Fit, form, function.

  • MrMarcaap
    MrMarcaap 4 years ago

    Mr Pete, I understand your method in this video for making an Eccentric.
    But what about the following situation:
    I don't have a piece of .750" OD stock, so I started with a piece of 1" diameter stock, then turned down about 1" length of it to .750 diameter, so now I've got 1" diameter stock mounted in the chuck with the very end of the stock turned down to .750 diameter. Since I have 1" OD mounted in the chuck and not .750" OD mounted in the chuck, what offset would I need in order to make the eccentric for which you're describing? Or should I ditch this method and just turn down a piece to .750 OD that is long enough to fit in the chuck?
    Let me know your thoughts
    Thanks in advance

    • mrpete222
      mrpete222  4 years ago

      @MrMarcaap Yes-ditch it & start over. lol

  • William Garrett
    William Garrett 4 years ago

    Very enjoyable and informative! Thank you!

    • mrpete222
      mrpete222  4 years ago

      +William Garrett Thanks for watching

  • greg wood
    greg wood 4 years ago

    Mr Pete I sincerely thank you for these videos. I am 51 and bought a 7x12 aisian lathe in December 2014 so I am very new to this. Started watching your videos even before I bought it. I now also have a mini mill. Today I refered to your video on making eccentrics to figure the shim needed in my 3 jaw for the offset I desired on a little project. Pretty scarey at first but it is going well so far. I also just got the drawings for your spool valve engine and hope to start on one soon.

    • mrpete222
      mrpete222  4 years ago

      Thanks for watching & good luck with that engine

  • atrohad
    atrohad 4 years ago

    Green looks great here in South Africa.

    • mrpete222
      mrpete222  4 years ago

      +atrohad Thanks for watching

  • Darren Martin
    Darren Martin 4 years ago +3

    Thank you. Forget the trolls, they couldn't tie your shoe laces.

    • mrpete222
      mrpete222  4 years ago

      +Darren Martin Thanks for watching

  • Patrick Craig
    Patrick Craig 4 years ago

    Enjoyed the video,Am going to make the vertical engine.This will help.Thanks.

    • mrpete222
      mrpete222  4 years ago

      +Patrick Craig Thanks for watching

  • commando340
    commando340 4 years ago

    thanks for another great video, very helpful.

    • mrpete222
      mrpete222  4 years ago

      +commando340 Thanks for watching

  • rcwarship
    rcwarship 4 years ago

    Thank you so much for taking the time to make, edit & post your wonderful videos. I really really appreciate you & your ability to explain complex tasks in easy to understand language.
    Thanks Again & Best Regards,

  • Lordfud13
    Lordfud13 4 years ago

    At least you explain what you are doing and were the errors mey creep in. Thanks so uch for still teaching us how this all works..

    • mrpete222
      mrpete222  4 years ago

      +Lordfud13 Thanks for watching

  • Ray Brown
    Ray Brown 4 years ago

    I have to cut an internal eccentric that will move balls in and out through a hole drilled through an inner revolving shaft and did not have a clue how to tackle the task, but as usual YOU have taught me something useful, how kind you are to freely pass on your knowledge. Thanks so much