handcranked Planetary Gearbox toy with large clearances

thingiverse

This is a small planetary gearbox toy with a 1:4 reduction ratio and a hand crank at the back, which is connected to the sun gear. The ring gear has an outer diameter of 42mm.All parts of this gearbox have been designed with fairy large clearances to ensure that the gearbox still works smoothly even if the parts were printed on a crappy printer with poor spatial accuracy. I have tried printing other planetary gearbox models, but most of them had too tight clearances and the gearboxes either could not be assembled or they locked up and did not turn properly.All parts of this model can be printed without the need for supports and there are no additional parts (e.g. bolts or bearings) necessary; the gearbox is assembled by simply clicking the individual parts together. The planet gear has to be printed three times and every other part only needs to be printed a single time.