| abstract |
A bearing (40) for a rotary cone (22) for a rock bit (10) is disclosed. The bearing (40) consists of a multiplicity of small synthetic diamond particles (44) nested within a matrix base (43), each with an exposed flattened surface to form the bearing. The diamond particles (44) are strategically positioned on a bearing surface and secured within the matrix base. A substantially identical synthetic diamond bearing (42) is concentrically positioned adjacent to the first bearing (48) to form the bearing package (40). |