Trash Compactor Replacement Gears

This is an OpenSCAD model for a replacement gearset for trash compactors by Whirlpool, and probably other brands. When my trash compactor's large drive gear broke in half, I took to the internet in search of a replacement. Lacking a model number and seeing prices from $60-80 or more, I did what any maker would, and instead spent several days designing and testing my own version, burning (literally) through $5-10 in plastic as well.

You'll want to print this in ABS, ASA (my choice), or something similar, lesser plastics will not be able to handle the heat from the friction of the gears. Make sure to lube up as well with some fresh grease. The version I'm uploading is the final iteration that I felt comfortable installing in the machine. It will run smoothly for a cycle or two, but the large gear still likes to bind up. I suspect this is due to there still being some play in the gear when it's installed on the shaft. I also had some warping of the ASA and elephant's foot-like symptoms, and I noticed some tiny plastic splinters accumulating even when the machine was running well. Hopefully it's just the gearset breaking itself IN, not just breaking itself…

My original large drive gear was apparently trashed at some point, so I wasn't able to count its teeth or take any other measurements. I worked backwards from the small gear, so I had an accurate teeth count and simply designed the larger gear to fit within the constraints of the two shafts. The third or so iteration of the small gear turned out very accurate; my eyecrometer estimates it at 97% true to the original. The OpenSCAD code is far from the cleanest I've written, but should be within tolerances for a personal project. In many places there are magic constants where I adjusted the measured physical dimensions to account for what I was getting out of my Ender 3 V3 SE. E.g., if you see something like radius = 25 - 3, that means I measured 25mm, but had to reduce the size a bit.

Hopefully one of you will be brave/crazy enough to try this out, and iterate on it a bit more until the gears fit and work perfectly. Then we makers will finally be free from the oppression of Big Trash Compactor and their scheme of planned obsolescence.