Which kind of shafts go with 4" omni wheels as I’m doing CAD and this is what happened: 
The Shaft doesn’t fit in the wheel
help…
The wheel needs wheel inserts I think.
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you need to put these things in
the original square hole you have is made for high strength shafts, not the normal type
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ahhh ok thanks
<20 chars>
Is it worth using high-strength shafts for a drivebase?
Probably not. Its not really necessary and it’s a lot of extra work
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thanks
20 charachters
I only use hs shafts for lifts. Use hs gears for everything though.