Hi Wayne.

Yeah I think your going to need a bigger shaft. What about some 1 inch gal water pipe?

I've used the 56205 bearing for a few of my windmills and it works well. The bearing comes as 2 parts, the bearing and carrier.

These go together like thus....

A couple of these will hold a 1 inch shaft well enough for your windmill. The VAWTs need a strong shaft if they are not supported at the top.

Glenn