[SEL] Engine bearings

[tamatea whanau]

william i had come across this book you can download off the internet for
babbit bearings lots of useful info may be helpful
http://web.utk.edu/~tprather/FoothillsTractorClub/TechTips/babbitt.html
brent nz
-----Original Message-----
From: sel-bounces at lists.stationary-engine.com
[mailto:sel-bounces at lists.stationary-engine.com]On Behalf Of William Young
Sent: Friday, August 17, 2007 10:07 AM
To: The SEL email discussion list
Subject: Re: [SEL] Engine bearings


Rob-san,  You make it sound so easy.  Just tell me how.  I know some of the
"DON'Ts" but not enough of the "DOs."  I have melt crucible and pouring
ladle, just don't know how to go about the actual pour. I also have an
electronic "gun" which will give read-out of molten alloy temperature.
P.S.  Your Nihong-go is very good, but this was the first time I heard it
with a Mexican accent.

  Curt-san, I think I must differentiate with you for I believe the three
primary metals in various Babbitt alloys are lead, tin and antimony, not
copper as you indicate.  Having once read extensively about Babbitt alloys,
I learned that there are many, many "recipes" each tailored to a particular
application, primary factors being speed, weight & pressure,  operating
temperatures, type and frequency of lubricant application.  Copper is a
major component of bearings used in work horse engines.  I have concluded
that just about any combination of Pb, Sn & Sb would be suitable for our low
speed, no load running conditions.
  Further, I avoid grease as a lubricant where ever possible, believing that
a good oil is much superior.
      ( Didn't the electrolytic production of aluminum follow, by many
decades, the development of Babbitt? )

  Once, many years ago, I attended  training courses at both Briggs and
Tecumseh mfg. plants and was surprised to learn how they receive their
aluminum -- molten, in trucks.
    So, it looks like Curt in NC must know Curt in IL,  who has often
invited me to attend his favorite engine meet,  where was it?? Bugaboo
somewhere?
    Keep the ideas ( and techniques )  coming.  Thanks to all -- except Rob,
to whom I say, "arigato ga toh gracias." Bill


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