石油机械上的钻具在工和过程中要造径向轴承和推力轴承来支撑和定位 ,作为钻具上的关键零件 ,轴承结构性能好坏直接影响产品性能。我厂前期研制的螺杆钻具有采用加有普通密封结构的深沟球轴承和推力球轴承。所有轴承装在主轴和轴承壳之间 ,轴承壳与主轴之间采用密封 ,中间的径 As the key part on the drilling tool, the bearing structure performance directly affects the performance of the products. I developed in the early stage of the screw drill has adopted a general seal structure of the deep groove ball bearings and thrust ball bearings. All bearings are mounted between the main shaft and the bearing housing, with a seal between the bearing housing and the main shaft, the middle diameter