Quote:
Originally Posted by MrForbes
We're planning to support weight with a 2" to 3" diameter tube, riding in some sort of plain bearing (bushing), are we doing something wrong?
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This seems like a far more mechanically durable / safe solution than using a hex shaft for climbing, if your team has the design and manufacturing "chops" to do it. Bushings are in general far stronger than bearings in terms of peak loading, and the rotational losses just aren't a big deal on a high power mechanism like this. A tight, crappy bushing might even help with backdriving a little.
I would be quite nervous about supporting the weight of your robot on an aluminum hex shaft this year, depending on the implementation. Have spares ready, at the very least.