Ok Chris, so you think that my blade bearing will hammer out as well...as it contains taper roller bearings...it is a common car hub. The turbine is not finished yet but it will turn the blades once a day to grease the rollers...
I like this setup as it is easy to build without lathe and cheap to get.
Slide bearings are probably the best choice, IGUS makes some great stuff over here and they are cheap but there are tight tolerances to keep and without a lathe the shafts will not be cheap to make which is why I did not mention them...
"The best choice for axial load is bronze thrust washers or bearings with thrust flanges."
I am not sure what you mean...google translate makes probelems here as well. Could you post a picture of an example or even of the complete setup on how you would construct the blade shaft bearing section?
Max
edit.
I think you mean this with the angular contact ball bearings...?:
http://www.ebay.de/itm/1x-Schragkugellager-3001-2RS-12x28x12-mm-NEU-/140898605990?pt=Wälz_Kugel_Rollenlager&hash=item20ce361ba6#ht_1776wt_732If so, I think I could get replacements for my hubs or choose a different make. Some trailer hubs have those inside them but usually those are the ones that are rated for 250 or 750 Kg axles...so I am not sure if they could hold up with a blade length of 3m.
I cannot quite remember the numbers exactly but I once calculated for a given set of laminated blades that the centrifugal force of a 6m prop was something like more than 500 KG of axial force on higher rpm for something like 50 mph and I like having some room for safety...
I am not sure if such a trailler hub can handle that...