Online Cycloidal Gear Builder

Almost exactly a year ago I published a blog post introducing an open source application for calculating cycloidal gears. The response was very positive but the fact that the tool depends on a specific version of .Net makes access a bit cumbersome.  Also the tool does not immediately show the resulting gears. Instead the user has to save the output as an SVG file and then display it either in a browser or an SVG editor like Inkscape. No instant gratification there.

All these issues are addressed in my new Online Cycloidal Gear Builder. Check it out!


9 thoughts on “Online Cycloidal Gear Builder”

  1. First off, “Thank You!” for the cycloidal gear designer. I have been searching for something like this to assist me with a clock I would like to design.

    I have not been able to get the DXF generated file to open within cad or a DXF viewer. I have been able to use your stand alone version, but not the on-line version.

    Thank you again, and have a great day.

  2. Finally, a calculator that can do the job! I’m a self educated clock designer/builder and I’ve been creating my gears with the help of many online resources. Your online calculator is a God send! Thank you so much for sharing. As you indicated in your post, I assume you still have the intent to build a wooden wheels clock if you’ve not already done so. I have some experience in clock building and I’m happy to share my many lessons learned, especially in regards to the building of the gear blanks prior to cutting teeth. If your goal is to build a clock with wooden gears that resists the elements, the real effort is in the engineered design of the wooden gear blank. Maxwell, Pittsford, NY

    1. Thank you for the kind words. I must admit that I haven’t made much progress on the wooden clock building front. I cut the first gear with my CNC router using a dremel as the spindle and realized that it is not accurate enough. I have a new spindle but still need to mount it, complete the speed controller that I prototyped, etc. Slowly but surely I will get there, though.

      I just discovered your web site and I am blown away by your designs! Obviously my aspirations are much more modest but I would be very interested in learning from your experience.

      Now I need to watch the videos on your youtube channel …

  3. I was delighted to find your ‘online cycloidal gear builder’ … but quickly disheartened when I discovered that it relies upon WebGL; which is widely identified as a serious security risk.

    Is there any way in which this very useful-looking application can be run OFF-line, in a safe environment?

    Note: I prefer to use my [Snow Leopard] Macs, but I also have access to Windows7 and XP machines.

    Please to not take this as any criticism of your work … I just feel uncomfortable about WebGL.


  4. I have designed and prototyped a cyclo-type of gearbox. Which works well but is a bit noisy. I would appreciate some design advise – as it need it to work silently.
    Tomas Mendes

  5. Dear Rainer, I may be on the completely false track here since I am not an engineer: I have generated a cycloidal wheel and pinion on your generator with the following parameter. Wheelteeth: 40 Pinionteeth: 10, Module: 0.44 This should result in pitch diameters 0.44 x 10 = 4.4mm and 0.44 x 40 = 17.6mm. The .dxf generates alright. However if I import this in Dassault’s DraftSight CAD I measure an overall OUTSIDE circle diameter of 17.24mm for the wheel and 4.4mm for the pinion.
    p.s. I have calculated the module from the arbour distance which is 11mm. Thus:
    M=(2×11) / (10+40)=0.44 – am I mistaken somewhere? Thanks and all the best, Alex Törzs.

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