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Oilite is a bronze or iron alloy impregnated with an oil lubricant commonly used in bearing applications. Oilite is formed using powder metallurgy so that tiny pores are present in the metal. The pores are then vacuum impregnated with an oil to improve the materials bearing ability. The material holds approximately 20% oil by volume. The most common lubricant is SAE 30 oil.
| Element | Grade 1 | Grade 2 | Grade 3 | Grade 4 |
|---|---|---|---|---|
| Copper – Cu | 87.20-90.50 | 85.70-90.00 | 82.80-88.30 | 80.90-88.00 |
| Tin – Sn | 9.50-10.50 | 9.50-10.50 | 9.20-10.20 | 9.50-10.50 |
| Graphite – C | 0-0.30 | 2.50-5.00 | 2.50-5.00 | 0.50-1.75 |
| Iron – Fe (max) | 1.00 | 1.00 | 1.00 | 1.00 |
| Total other elements (max) | 1.00 | 1.00 | 1.00 | 0.50 |
| Lead – Pb | — | — | — | 2.00-4.00 |
| Zinc – Zn (max) | — | — | — | 0.75 |
| Nickel – Ni (max) | — | — | — | 0.35 |
| Antimony – Sb (max) | — | — | — | 0.25 |
| Type | Density, g/cm3 | |
|---|---|---|
| Grades 1 and 2 | 1 | 5.8-6.2 |
| Grades 1, 2 and 4 | 2 | 6.4-6.8 |
| Grades 1 and 2 | 3 | 6.8-7.2 |
| Grades 1 and 2 | 4 | 7.2-7.6 |
| Grade 3 | 1 | 5.8-6.2 |
| Grade 3 | 2 | 6.2-6.6 |
| Type | Grade 1 | Grade 2 | Grade 3 | Grade 4 |
|---|---|---|---|---|
| 1 | 27 | 25 | 11 | — |
| 2 | 19 | 17 | — | 17 |
| 3 | 12 | 9 | — | — |
| 4 | 9 | 7 | — | — |
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