Babbitt
What is Babbitt?
Babbitt metal is any of several tin or lead-based alloys used as bearing material for axles and crankshafts, based on the tin alloy invented in 1839 by Issac Babbit for use in steam engines. Modern babbitts provide a low-friction lining for bearing shells made of stronger metals such as cast iron, steel, or bronze.
They may be made of:
- high-tin alloys with small quantities of antimony and copper;
- high-lead alloys containing antimony, arsenic, and tin; and
- intermediate tin-lead alloys with antimony and cooper.
Babbitt & Type Compositon Chart |
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| Name | ASTM | Pb – Lead | Sn – Tin | Sb – Antimony | Cu – Copper | Zn – Zinc |
| Hoyts | > | >- | >90% | >7% | >3% | >- |
| Nickel Gen. | >2 | >- | >88% | >8% | >4% | >- |
| Imperial Gen. | > | >- | >86% | >7% | >7% | >- |
| Crusher | > | >24% | >60% | >14% | >2% | >- |
| Planer | > | >59% | >32% | >9% | >- | >- |
| Harries Heaby | >7 | >74.85% | >10% | >15% | >0.15% | >- |
| Star Friction | > | >83% | >5% | >12% | >- | >- |
| Silvertone | > | >80% | >2% | >18% | >- | >- |
| Choker | > | >93% | >- | >7% | >- | >- |
| Under Water | > | >- | >69% | >- | >1% | >30% |
| HU Speed | > | >69% | >15% | >16% | >- | >- |
| CT Babbitt | > | >71% | >10% | >19% | >- | >- |
| Sae 11 | > | >- | >86% | >7.50% | >6.50% | >- |
| Turbine | > | >- | >85% | >7% | >8% | >- |
| Mill Anchor | > | >83% | >5% | >12% | >- | >- |
| Magnolia Def. | > | >81% | >6% | >13% | >- | >- |
| Marine | > | >19% | >77% | >2% | >2% | >- |
| Thermitt | > | >78% | >7% | >14% | >1% | >- |
| Gotta Verken | > | >2% | >82% | >11% | >5% | >- |
| Sp . Saw Guide | > | >71% | >10% | >19% | >- | >- |
| #4 ASTM 1959 | > | >10% | >75% | >12% | >3% | >- |
| Super Though | >3 | >- | >83% | >8.50% | >8.50% | >- |
| #4 Regular | >15 | >88% | >2% | >10% | >- | >- |
| Linotype | >8 | >84.60% | >4% | >11.40% | >- | >- |