No announcement yet.

Book: Gears and Gear Cutting by Ivan Law?

  • Filter
  • Time
  • Show
Clear All
new posts

  • Book: Gears and Gear Cutting by Ivan Law?

    A Workshop Practice Series book I'm thinking about ordering.

    If you've read it, what did you think?


  • #2
    I have it. It explains much about gears. It has goes into several methods of making gears on the lathe and milling machine.
    Well written and understandable.
    It doesn't go into the exotic gears, but covers those most of interest to the HSM very nicely.
    Jim H.


    • #3
      I have it, very good book for the HSM. If you contemplate ever making gears I would buy it.
      Free software for calculating bolt circles and similar: Click Here


      • #4
        Real good book. I cut my first gear after I read it. The gear turned out really well which is a credit to the book and not my skills at the time.
        To invent, you need a good imagination - and a pile of junk. Thomas A. Edison


        • #5
          I have it. Haven't cut any gears yet, but that'll be my point of departure when I get the proverbial 'rountoit'. I'm fascinated by the design, described in the book, of a lathe mounted tool for providing relief on form gear cutters. It took a lot of study and pondering for me to understand exactly how it works. As I recall, John Stevenson has said that he made one and it works very nicely.

          [This message has been edited by lynnl (edited 01-21-2004).]
          Lynn (Huntsville, AL)


          • #6
            For the home shop guy this book has got to be the best one out there. Simple explanations without going into realms of maths you can't do anything with anyway.
            Gears are a bit of a hobby of mine and I must have about 4 foot of shelf space on various gear books. Ivan's book is never far away.
            I actually have two copies, one resides on my desk and the other moves between the thunderbox and my bedside table.
            I do better work in the thunderbox than I do in the workshop, it's usually quieter

            John S.

            Sir John , Earl of Bligeport & Sudspumpwater. MBE [ Motor Bike Engineer ] Nottingham England.


            • #7
              Dan, how deep do you want to go? If you just want to be able to understand and cut a gear it is pretty easy.
              If you read my article in HSM Jan/Feb 2004 page 48 on the taper attachment I tried to give a basic explaination. Once you understand PITCH DIAMETER and DIAMETRAL PITCH most of the mystery has gone out of gear cutting. After that it just using the formulas to find the different dimensions.
              I am not saying that there is nothing to learn about gearing because you can get into them very deep if you want and they can get complicated. Besides it never hurts to have good reference book handy. John


              • #8
                First time I heard it called that, but I like it! Thuderbox!

                If any of you lads out there know the diamter, hub diameter, thickness, and pin size, plate numbers for a complete set of B&S plates, radius to the screw hole centerline, and are screws aligned to the start holes ("1's") in a particular way. (say, a set of blue prints would be spiffy!)

                I have offered Bill in Texas to drill him a set for his dividing head (not B&S, but they will work) so he can get to cutting some gears himself. This is all gratis of course - because I am bored and just helping out a brother.

                [This message has been edited by Thrud (edited 01-22-2004).]


                • #9
                  Excellent book. The gears by circular approximation business works well, by the way; I used that technique to make the set of timing gears for my "Kiwi" on which is languishing, now that I have a real job again....

                  Try to make a living, not a killing. -- Utah Phillips
                  Don't believe everything you know. -- Bumper sticker
                  Everybody is ignorant, only on different subjects. -- Will Rogers
                  There are lots of people who mistake their imagination for their memory. - Josh Billings
                  Law of Logical Argument - Anything is possible if you don't know what you are talking about.
                  Don't own anything you have to feed or paint. - Hood River Blackie


                  • #10
                    For some reason I can't find it anywhere. Must have lost it somewhere in the swarf pile.

                    What was he saying about cycloid-vs-involute gear tooth form?

                    Or rather, what do you guys say about cycloid gear tooth form-- you know, power transmission capability, cv, efficiency etc? Any good? If so, why is involute so much more prevalent?


                    • #11

                      Or rather, what do you guys say about cycloid gear tooth form-- you know, power transmission capability, cv, efficiency etc? Any good? If so, why is involute so much more prevalent?

                      I can't seem to locate my copy at the moment, but the basic answer is that the small edge that the cycloid tooth form has in performance characteristics is swamped by its higher cost of production and its much more stringent demands on maintaining the accuracy of center distance.

                      Rich Kuzmack

                      Pi = 355/113 . . . to
                      <85 parts per billion
                      Rich Kuzmack

                      Pi = 355/113 . . . to less
                      than 85 parts per billion!


                      • #12
                        Thanks, Indexer. So, it is really a better performing form, but less than perfect CDs gets in the way of CV? Okay. About higher production costs... What, for the tooling you mean? Otherwise, hobbing is hobbing, right?

                        Hmm. I have some cycloid hobs; maybe I should go try them and see for myself. Or do a Google. Much of the gear theory covered in other literature applies only to involute forms. Leaves a few questions, so learn by doing, right?