Help with drive shafts

Which kind of shafts go with 4" omni wheels as I’m doing CAD and this is what happened: image
The Shaft doesn’t fit in the wheel
help…

The wheel needs wheel inserts I think.

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image
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
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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.