Of all the things I've designed in Tinkercad, this project has been the one to get the most redesigns and that gets the most use. It's a gear set to reduce the output of an appliance motor from 1750rpm to ~100rpm, give or take.
The last set I printed in PLA have probably been run for easily twenty hours in total, about an hour and a half at a time. The early sets were about 30% bigger - for the machine they're made for I can't go any smaller without having to throw in a bunch of extra gears to get all the spacing of the outputs right.
There's some filigree in the two upper gears. I don't have to put that in there, and no one ever sees it, but I like knowing it's there.
