Planetary Gearbox 5:1 Double Helical Nema17
Print Profile(1)
Description
A strong, compact gearbox for NEMA 17 stepper motors. It uses a double helical gear design that is printed as one piece ( in place ), which is the only way to make it work ( It is impossible to assemble a double helical planetary gearbox in any other way.) . This design is special because it removes the side-push force (axial thrust), meaning you don't need extra bearings to handle that force, making the model simpler. The ~ 5:1 gear ratio gives your motor a huge boost in torque
Feel free to increase the number of walls and infill for a stronger result.
Don't disassemble the gears; There is no way to put it back together.
After printing, try to move the gears before using them. PLA and PETG print differently with different tolerances, but both have worked. PETG gave a better tolerance.
Apply some grease lubricant.
You need 4 * M3 3+mm for mounting the motor and M2.5 or M3 12mm+ screws.
License
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.
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