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Old 05-22-2009, 11:31 AM
ncarter ncarter is offline
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Join Date: Jul 1999
Location: Tampa, Florida, USA
Posts: 214
What are rod bearings made of?

Ok, this post is kinda convoluted, so bear with me (and pardon the pun).

In addition to being an amateur mechanic, I'm an amateur jewelry artist and silversmith. I find that certain auto parts lend themselves to interesting secondary functions as jewelry or art pieces. While cleaning out the garage a few weeks ago, I found my box of junk left over from rebuilding a 616.912 motor, including the old main bearing set. Inspiration struck, and I wound up with a bracelet/cuff made from the 250,000-mile connecting rod bearings:


Upon further thought, I'm a little concerned whether this is safe to wear. The bearings, to my understanding, are a shell of hardened carbon steel with a thin layer of Babbitt metal on the inner/lubricated surface. So which of the possible Babbitt alloys is it?

According to Wikipedia http://en.wikipedia.org/wiki/Babbitt_metal there are a handful of possible alloys, one of which is 80% lead.

I don't think lead is readily absorbed through the skin; it's apparently only dangerous if ingested or inhaled. From here: http://www.rings-things.com/jewelry-safety.html "Jewelry components containing lead are generally considered safe for adults to handle and wear externally."

I think I might just put a layer of acrylic or clearcoat on the inside of the bearing shells. Better safe than sorry.

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