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Bearing Babbitt Melting Temperature 1

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jamesjm

jamesjm

Mechanical
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Jul 8, 2005
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On average, what is the melting temperature of the babbitt on a journal or tilt-pad thrust bearing?
 
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I have never measured it. It may vary depending on the particular babbit metal used. But I have always used 350 °F as the expected melting temperature. However, I would never deliberately run a babbit bearing at an operating temperature above 250 °F.
 
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The melting point for common babbit is 462°F. This is for the lead/tin and tin/lead babbits.
 
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The common tin-base and lead-base babbits are specified in ASTM B23. For high performance rotating equipment,tin-base is the choice, and the lead should be specified as low as possible.

For ASTM B23, Babbit types /melting temperature deg F
1 433
3 464
4 363
5 358
7 464
10 468
11 471
12 473
16 471
19 462
 
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