When I was a kid, (back around 1955), a friend of mine was out on his front porch reading a book, when he was killed.
A fellow was mowing grass by the roadside, well over 100 feet way, when the blade broke apart in the center.
Half the blade flew across the highway and stuck my friend in the forehead, killing him instantly.
Since then, I've been leery of spinning blades.. They do scare me..
Humm, maybe that's why I still have all my fingers.?.
And, I do agree with Nibs about the thinness of the hub..
However, I'm not so sure about the Nibs cigarette paper story.
Unless they had zero friction bearings back in those days..
Maybe those were ZigZag papers and were being used for ...?..?..