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You don’t think it could work this way ?
Otherwise, we thought that welding a steel piece to the crankset bike that will fit with the existant shaft might be a way of doing it. But we need to have a connexion that is rigid and something to make the shaft turning with the crankset. Because, as it is, circle inside circle won’t make the shaft turning.
Hi everyone, we finished our bike powered shredder ! It works but it won’t last if we don’t modify our shaft.
We connected the original shaft of the shredder with the crankset of a bike, which need a tapered end to fit, so we modified ourselves the shaft but we removed too much material so it’s twisting.
We think that we need to make a new shaft with the normal circular profil but with an end that fits perfectly well with the crankset (meaning a squared and tapered end like here: https://www.sheldonbrown.com/bbtaper.html) and a bolt to tighten the all. We also think of adding a flying wheel on the other end of the shaft in order to balance the forces.
We are open to any suggestion you may have and if you have any question about our bike powered shredder don’t hesitate.
Hi ! Thank you for your response ! I already searched on these topics but i didn’t see anything about using one or two bicycle chains, what is advised ? And how should be the sprockets if we use two chains