With all cylindrical roller thrust bearings, increased sliding friction can occur on the end of the cylindrical rollers.
所有的圆柱滚子推力轴承，滑动摩擦增加，可能会出现圆柱滚子的结束。
2
For tapered roller large end and sliding friction between the inner wall, the speed limit is often lower than the same size cylindrical roller bearings.
因圆锥滚子大端与内圈挡边之间滑动摩擦，其极限转速往往低于同尺寸的圆柱滚子轴承。
3
The pinch roller device adopts rolling friction. Its working pressure can be adjustment in accordance with the requirement of tablet to be pressed.