![]() ![]() An LCD accepts the gear diameter and number of teeth. We might have been more inclined to use a cut-off wheel from a rotary tool, but this certainly did the trick. The saw blade was custom-made from a washer, grinding an edge and using a 3D printed template to cut teeth in it. Naturally, an Arduino drives the whole affair. There’s also a lead screw and the associated components you usually see in a printer’s Z-axis. Stepper motors, aluminum extrusion, straight rods, bearing blocks, and rod holders are all used in the build. If you’ve built a 3D printer, you’ll see a lot of familiar parts. ![]() Using a small saw blade, the machine cuts gear teeth into some plastic material and - presumably - could cut gears into anything the saw blade was able to slice into, especially if you added a little lubrication, cooling, and dust removal. He ended up using a simple CNC machine that makes use of several components that were either salvaged from a 3D printer or produced on one. We’ve seen plenty of people 3D printing custom gears over the years, but decided against an additive process for his bespoke component. ![]()
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