The thompson super smart bearings for the thompson shafts actually have quite good ratings, I was looking at them, and there 3/4 inch super smart and there 1.25 in super ball bearings for round shafts had the same load rating. They advertise them as cost saving, because you can use a shaft that is much smaller. I am going to use those with 3/4 in. fully supported shaft. The rigidity of the shafts depends alot on how they are supported. Oh I forgot to mention that the super smart bearings are only a couple dollars more than the regular bearings, so they are quite reasonable. |