If anyone Is trying to source some of these for smaller scale prop's, try your local train shop. I found out that these are same size as "O" gauge train axles, they run 2mm axle shafts, so you can now get some rather nice 2mm turned brass bearing bushes. CHEAP !
last pacl I purchased were a miserly A£3.00 for 25 bushes! Now try and get that sort of a deal In a model boat shop.