1. Under normal conditions, the efficiency of rolling bearings is comparable to that of hydrodynamic lubricated bearings, but higher than that of hybrid lubricated bearings;
2, the radial clearance is relatively small, the radial angle contact bearing can be pre-tightened with pre-tightening force to eliminate the play, and the running precision is high;
3. For the shaft diameter of the same size, the width of the rolling bearing is smaller than that of the sliding bearing, which makes the axial structure of the machine compact;
4. Most rolling bearings can be subjected to radial and axial loads at the same time, so the bearing combination structure is simple;
5, less lubricant consumption, easy to seal, easy to maintain;
6, do not need useful non-ferrous metals;
7. High degree of standardization, batch production, low cost;
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