A friend of mine broke the diecast universal joint in his Craftsman floor jack. He couldn't find a replacement universal so, in looking at the broke pieces, I figured it wouldn't be that hard to make a new one out of steel.
The pieces aren't that big. Only 3/4" in diameter. All of the parts after dis-assembly.
I found a piece of 3/4" diameter steel in the drop pile.
I cleaned up the OD in the lathe, faced off the ends and drilled out the bore's for the mating parts. Test fitting the parts.
Continued in next post.