| 20110243649 | BALL JOINT AND METHOD OF MANUFACTURING BALL SEAT - A ball joint and a method of manufacturing a ball seat reducing the frictional force between a ball stud and the ball seat, reducing torque of the ball joint, improving performance of the ball joint as a spherical joint, and improving steering performance and the overall feel of riding in a vehicle. A method of manufacturing the ball seat, which has a spherical inner surface in which a ball stud, acting as a spherical joint is seated, includes: forming densely arranged irregular concave features in a processed portion of a mold core, for molding the spherical inner surface of the ball seat, by etching with a chemical solution; and forming the spherical inner surface of the ball seat using the mold core having the irregular concave features. | 10-06-2011 |
