滚针轴承与圆柱轴承间有什么差别
滚针轴承装有细而长的滚子(滚子直径D≤5mm，L/D≥2.5，L为滚子长度)，因此径向结构紧凑，其内径尺寸和载荷能力与其它类型轴承相同时，外径小，特别适用于径向安装尺寸受限制的支承结果。根据使用场合不同，可选用无内圈的轴承或滚针和保持架组件，此时与轴承相配的轴颈表面和外壳孔表面直接作为轴承的内、外滚动表面，为保证载荷能力和运转性能与有套圈轴承相同，轴或外壳孔滚道表面的硬度，加工精度和表面质量应与轴承套圈的滚道相仿。此种轴承仅能承受径向载荷。
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