Quote:
Originally Posted by Alex.q
That would take pretty long bolts though, so I don't know if it is the best option.
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Why are 2" or 3" bolts hard to come by? And with box tube, you would no longer need the extra piece of c-channel to support the axle in a second spot, so you don't need those particular bolts any more anyway, AND you've gotten rid of 30 components (1 bracket, 2 bolts, 2 nuts per wheel) in the entire drive base, making the whole thing much simpler and less prone to failure.
Also, I would probably only position nuts/bolt heads in tight spaces like that as a last resort. That's harder to get at than you might think, and you want that sort of thing to go fast.
Other than that, CAD looks good, and with Toughbox Nanos you should be fine (the orthogonal render made them look more like CIMple boxes...). I might prefer a bit faster, but 9fps is safe, and you'll have little trouble pushing people around. You might want to see if you can get it to the traction limit.