I saw this the other day and was shocked that I didn't know this!
Did you know that the balls in a ball bearing have a top and a bottom? I never knew that. :-[
See the explanation at about the 1:48 mark...
[video=youtube;Uf_x_vVJtEE]http://www.youtube.com/watch?v=Uf_x_vVJtEE&feature=player_embedded#at=142[/video]
Did you know that the balls in a ball bearing have a top and a bottom? I never knew that. :-[
See the explanation at about the 1:48 mark...
[video=youtube;Uf_x_vVJtEE]http://www.youtube.com/watch?v=Uf_x_vVJtEE&feature=player_embedded#at=142[/video]
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