通常精度和转速较高的轴承,均采用实体保持架,其材料绝大部分是用黄铜。随着我国轴承工业的蓬勃发展,每年需要大量的黄铜用于制造轴承保持架,而铜是稀少的材料,不仅价格昂贵,而且是重要的战略物资。 Usually higher accuracy and speed bearings are solid cages, the vast majority of its material is brass. With the booming development of bearing industry in our country, a large amount of brass is needed to manufacture bearing cage every year. Copper is a rare material which is not only expensive but also an important strategic material.