Designed and manufactured with ultimate ruggedness in mind, the Rock bit balls work well in extreme conditions. The smooth ground and polished finish, in combination with high accuracy of diameter and concentricity, make this product ideally suited to the harsh demands of bearing assemblies in downhole drilling motor applications.
They are commonly used in drilling equipment for wells, oil fields and offshore drilling platforms.
| AISI Type S-2 Rockbit Steel Balls | |
| Size Range | ¼” (0.25) thru 1 ½” (1.50) |
| Grades | 100, 200 |
| Chemical Compositions | |
| Carbon | 0.45% to 0.55% |
| Manganese | 0.30% to 0.50% |
| Molybdenum | 0.30% to 0.60% |
| Silicon | 0.90% to 1.10% |
| Phosphorous | 0.030% Max. |
| Sulphur | 0.030% Max. |
| Vanadium | 0.050% Max. |
| Mechanical Properties | |
| Tensile Strength | 310,000 psi |
| Yield Strength | 290,000 psi |
| Elongation in 2 Inches | 7% |
| Reduction in Area | 25% |
| Modulus in ElastIcity | 30,000,000 psi |
| Density | 0.283 lbs/cubic inch |
| Physical Characteristics | Extreme Wear Resistance |
| Hardness | 54-60 Rockwell C |
| General Usage | |
| Well Drilling, Oil Drilling |