Step 6: Making Compound Gears

Compound gears are two or more gears that are stuck together at their center. The process is fairly simple now that the gears are made, it's just a matter of aligning then merging them.

  1. Open the gears that you want to compounderize.
  2. Copy one gear and paste it into the other gear's file.
  3. Using the "Assembly" tool, select the inner circle of the second gear and snap it to the center of the first.
  4. Select both gear solids and Boolean them into one solid.
  5. Add spokes and save for printing.
Try making gears that instead of spokes have a honey comb network <br>
Thanks a lot for your great instructable!
Another gear generator I've found useful, usually for paper patterns and woodworking: <br>http://woodgears.ca/gear/ <br>Try for free, $26 to buy.
I'd like to generate gears for a clock moon phase dial. Not the usual 59 tooth gear, but using a set of gears that produces a moon dial accurate to the loss of 1 day per 122 years or one that loses only 1 second every 2.82 years (depending on the accuracy of the clock motor that driving it). <br> <br>I don't own my own 3D printer. Is there a company that I can pay that will print the required gears for me?
There most definitely are:<br> <a href="http://www.shapeways.com/" rel="nofollow">Shapeways.com</a><br> <a href="http://i.materialise.com/" rel="nofollow">i.materialise.com</a><br> <a href="http://www.ponoko.com/3d-printing" rel="nofollow">ponoko.com</a>
Thank you, Tomdf! <br>
You sir have made my day better. I had never heard of all-silhouettes.com (you forgot a hyphen), but it is awesome! <br>
They got some really good stuff over there. <br>Thanks for the heads up on the link, I really butchered it :p
Absolutely fabulous!! What a great introduction to making gears, thank you very much. <br> <br>Ralph
I think this is really neat, and I have fiddled around with a gear or two my self on the rare occasion. With a 3d printer the possibilities would be endless, well done.
I never knew Inkscape could render gears. Thanks for the tip.
Right, it is kind of a weird thing to be included by default in inkscape.
Little surprises me in the realm of FOSS anymore. I don't subscribe to the mistaken belief that logic has much to do with anything when it comes to computer science. Us humans still write the programs after all.
Wow, that is just gorgeous. Can I get it rather cheaply as a stencil?
Stencil? Hmm, sure, I think I know what your asking for. Is it this? I've also added a vector version to the first step. <br>
THIS IS BRILLIANT! Thank you x 10000
thanks for posting that's real cool
Glad you liked it :)
Great stuff. Keep it up. <br>If you do get to making gearboxes that run for long periods then a few odd numbered gears are a good idea. A hunting gear set (uneven ratio) lasts much longer because the same teeth don't continue repeating on the same teeth. And they don't have as many harmonics issues when they go fast.
Ah thank you! I was completely obvious to this concept so when I choose the number of teeth I was mainly focused on making the math easy :P <br>Gear Set 2 will use hunting gears, now that I know what they are.
lol... you lost me at 3D printer, tom! ;-D

About This Instructable


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Bio: When I was young I took all of my toys apart just to see inside. Eventually I learned how to put them back together.
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