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I'm new to mechanical engineering, gears, and motors. Coming from a software/hardware background, I am trying to understand how to leverage gear reduction to maximize the torque output of a stepper motor for an equatorial mount. The speed can be very slow so I would like to focus on maximizing torque for a heavy payload.

By my understanding, the output torque is the product of the input torque and the gear ratio. Is this the same for the "holding torque" of a gear system? Is the output holding torque the product of the input holding torque and the gear ratio?

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  • $\begingroup$ Yes, plus stiction and friction. $\endgroup$
    – Donald Gibson
    Sep 26, 2017 at 20:39

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Yes, the holding torque goes up proportionally with the gear ratio. Plus the friction of the gear train, and any other seals, bearings along the gear train that add friction.

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