A few days ago the first set of 6-megawatt wind turbine main shaft bearing that developed independently by LYC for countrys 863 major scientific research project was preliminary accepted by project team personnel. This product adopts a new material OD meets 3200 millimeters with 6650 kilograms. The successful development of this product fills bearing industry and LYCs research and manufacture blank in large megawatts main shaft bearing area.