Planetary Gearbox - High Reduction Ratio (118.1:1)
thingiverse
This planetary gearbox was designed to provide a large reduction ratio in a relative small design. The bearing balls I used are 3.2 mm in diameter. After my harmonic drive prototype I wanted something smaller that could house a high reduction ratio into a smaller space. Also I wanted to get rid of the flexible parts. The gearbox runs nice and smoothly. If you have any comments or if you need any custom parts for this thing (e.g. motor mount or shaft mount), please let me know! Thanks for viewing/watching! Animation:http://youtu.be/m0P7M_uoYJ4 Video:http://youtu.be/NRGnOpi60dw Instructions The gearbox has the following buildup: (All gears are module .75 gears) 1x 61 teeth gear (largest part, "bucket") 1x 62 teeth gear 4x combo gear (21 and 20 teeth) 1x small gear (20 teeth) 1x drive shaft (21 teeth) When assembling please note that the 4 smaller gears are not exactly 90 degrees apart. two are 87.8 degrees apart, the others spaced 92.2 degrees. I printed everything with a 93% flow rate. This was necessary as my first print (100%) was a bit too "thick" (the teeth were too big),
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