To do this, in a new sketch on the same plane, we first create a horizontal line at the top of the circle, and then create a line with the pressure angle (20 degrees, since that’s common) which passes through the top of the circle, so we end up with a sketch that looks like the one below. We want to create the edge of the tooth as if it were a point on the imaginary string unwinding from our post. (I recommend using the top plane for all these sketches.) Step 2 We know that the pitch diameter of the gear will be 19/32 inches, which equals 0.59375 inches, but because we can keep equations in CAD, we’ll just create our first circle with a diameter of “=19/32”, as shown in the picture below. Go slowly and make sure that you follow each step carefully, and soon you’ll have a great gear ready for print! Step 1įor our example, we want to create a 19-tooth 32-pitch gear. In this tutorial, I’ll walk you through the process in SolidWorks, and you can use a similar system for any other program.Ĭreating involute gears in a CAD program is tricky, but if you follow the steps below, the teeth will come out right every time. What to do about the fact that most CAD programs don’t have a “create involute gears” button? Welp, you’ll have to create these geometries manually. Say you’re 3D printing a robot, and you’re designing a sweet gearing system to make your robot move smoothly.
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