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Super Compact planetary gearbox (fully 3d printed) – 3D printable model from MakerWorld MakerWorld
Engineering

Super Compact planetary gearbox (fully 3d printed)

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This is a super compact planetary gearbox that is fully 3d printed and requires no screws (everything snaps into place). I made this for a electric screwdriver I am working on. The shaft sizes are sun = 0.125 inches (3.175mm) and planets = 0.0984252 inches (2.5mm). The sun gear has 36 teeth, planet has 18, and the ring has 72. This is a 3:1 ratio. In theory this should give me a torque of around 6.69 (losses not included) which is enough for a small electric screwdriver when in a stack of 3 (27:1) ratio. This is a very compact design which is needed for my project and will be helpful for other compact geared projects. If you need a different planet carrier here is the planet coordinates assuming sun gear is (0,0) in your chosen design software. If you guys have any questions, please feel free to leave a comment/reach out :D.Hole A: ( 10.800 mm, 0.000 mm ) Hole B: (−5.400 mm, +9.353 mm ) Hole C: (−5.400 mm, −9.353 mm ) Also I find that it spins easier (less friction) if you make the cas
Category
Engineering
Source
MakerWorld
Published
Updated
What you need to print this: Intermediate Low confidence
Single piece Hardware needed
Supports 1/3
Assembly 0/3
Settings 1/3
Bed size 0/3
Post-process 1/3
Printer
FDM / FFF
File format
STL
Material
PLA
Min. bed size
50 mm (Small)
Post-processing
Hardware
Software
Cura, PrusaSlicer, or similar
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