双列圆柱滚子轴承
双列圆柱滚子轴承说明：双列圆柱滚子轴承有圆柱形内孔和圆锥形内孔（轴承后置代号加K）两种结构。该类轴承具有结构紧凑、刚性大、承载能力大、受负荷后变形小等优点，特别适用于机床主轴支承。圆锥形内孔还可以起到微量调整游隙的作用，且可以简化定位装置结构，方便安装拆卸
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