Danish roller bearings, 100BC

[richsc]

I just got a book on ancient technologies, and there is an illustration the author says is a brass and wooden roller bearing for a wagon axle, dated 100BC. He goes on to say that it appears the invention died with the inventor, which I assume means that there weren't any other examples found. I'd never heard of this invention before, and it hasn't shown up in any other finds that I've seen. Did this roller bearing really exist or is the book (Technology In the Ancient World<br>
by Henry Hodges) stretching a point?<br>
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<p>Richard Campbell, <b>Legio XX</b><br><br>
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