Belt drive pully

by vylbird, published

Belt drive pully by vylbird May 15, 2016
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Belt drive pully by vylbird is licensed under the Creative Commons - Attribution license.

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This component was designed as one-half of the very-high-ratio belt drive system in a hobby wind turbine. The turbine turned out to be a bit of a dud due to issues with the dynamo*, but the pully works perfectly. It's got a decent flange for keeping the belt in place (I had so many issues with belts slipping off while I worked out the best way). The upper flange is a 'crenulated' design - they all smudge together when printed, but it makes the overhang a lot easier to print. That's my own innovation - I don't think anyone else has thought of that trick.

One piece of advice though: Rubber bands do not last. They degrade over time. Get a proper drive belt if you don't want to be replacing it every month.

*The textbooks lie: You can use a DC motor as a dynamo, but they suck.

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