At this point I installed some stainless bolts from the back side as studs. I did not want to use bolts with the aluminum threading.

The next step was to make a collar to contain the bearings. I opened up the remnants from the flange centers. (4 of them in the chuck)




Installed in the hub here. (I made them a press fit)



The next step was to open up the wheel centers. My lathe wasn't big enough for this, I ended up using a fly cutter on the mill.



Next the wheel are bolted onto the hubs.



I used .303" rod for the bearings, the whole wheel is assembled here. You can see I decided to weld the collar into the hub to try it out. The wheels are basically complete in this picture. I bought an used cutting board from goodwill to make a UHMW washed for the cotter pin in the axle to wear against. It cost me about $300 per pair without cradles to build these wheels. Cradles cost $50 each used or $110 each new.