Gearbox design requirements and so forth

AI Thread Summary
For designing a gearbox that outputs 200Nm from an input of 0.25-0.3Nm, an epicyclic gear train is recommended for its efficiency. This method allows for a compact design while providing the necessary torque multiplication. Additional design guidelines include considering material strength, gear ratios, and load distribution to ensure durability and performance. The gearbox will be user-operated, emphasizing the need for ergonomic considerations in the design. Efficient gear train selection is crucial for achieving the desired output torque.
darren.g
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Hi, I am looking to design a gearbox that outputs 200Nm from an input of 0.25-0.3Nm. My question is which gear train method would be more efficient. Also any design guidelines if there are any.

The gear box is to be rotated at the input by a users own strength
 
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Welcome to PF, Darren.
I'd recommend looking into an epicyclic train first, although it could be done otherwise.
 
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