This is a 3:1 gearbox to fit a NEMA14 motor. (NEMA17 pictured, with an adaptor plate.)

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[DIR] Parent Directory - [   ] kossling-toygear.stl 17-Dec-2015 09:47 240K requested just as a toy. [   ] kossling.zip 07-Dec-2015 10:34 233K all parts and SCAD [IMG] kossling-nema14-gearbox.jpg 06-Dec-2015 16:50 151K [   ] kossling-planet.stl 04-Dec-2015 11:37 141K early test of planet gear
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