Power Transmission Engineering Magazine
www.powertransmission.com/articles/428-non-metallic-bearings-an-alternative-worth-considering

Non-Metallic Bearings - An Alternative Worth Considering

June 1, 2011
This article takes a look at alternative-material, non-metal bearings, and it turns out the first bearings of that type - wood, in this case, were the norm - not an alternative.