SKF进口轴承长期载荷工作要注意观察滚道面的轨迹。SKF进口轴承转动的时候，轴承的内圈与外圈的滚道面由于与滚动体是滚动接触，因而运行轨迹为暗面，运行轨迹附在滚道面上不属于异常，由此变可得知负载条件，所以当拆卸SKF进口轴承的时候，请严加注意和观察滚道面的运行轨迹。如果仔细观察运行轨迹的话，则会得知只负担径向载荷，承受大的轴向载荷，承受力矩载荷，或在轴承箱上有极端刚性不均等。可以检查对轴承是否加上了意外的载荷和安装误差是否国大等，并成为追究SKF进口轴承损作原因的线索。
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一般来说，相同内径的轴承的径向负荷能力按下列顺序递增：深沟球轴承＜角接触球轴承＜圆柱滚子轴承＜圆锥滚子轴承＜调心滚子轴承转速能适应机械转速的轴承类型[轴承转速的界限值基准用极限转速表示，其数值载于ntn轴承尺寸表]轴承的极限转速不仅取于轴承类型还限于轴承尺寸、保持架型式、精度等级、负荷条件和润滑方式等，选择时必须考虑这些因素。下列轴承大多用于高速旋转：深沟球轴承、角接触球轴承、圆柱滚子轴承旋转精度具有所需旋转精度的轴承类型ntn轴承的尺寸精度和旋转精度已由GB按轴承类型标准化了]机床主轴、燃汽轮机和控制机器分别要求高旋转精度、高转速和低摩擦，这时应该使用5级精度以上的轴承。