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I am designing a concept for a LEO spacecraft and need to transmit mechanical power (0.5Nm @200rpm rotation) over a distance (1-2ft). Chains or belts would be a natural choice for terrestrial applications, however for chains I am not sure how maintenance free they are and for belts I am not sure whether the materials (neoprene with fiberglass and nylon coating) would last. No UV radiation, application inside 1-3mm aluminum housing.

Is anyone aware of an application of a belt drive and the used materials?

What would be the limitations of a chain in such an application?

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