High-speed precision angular contact ball bearings are mainly used in high-speed rotating occasions with light loads, requiring bearings with high precision, high speed, low temperature rise and low vibration, and a certain service life. It is often used as the supporting part of the high-speed electric spindle and installed in pairs. It is a key accessory for the high-speed electric spindle of the inner surface grinder.

  Main Specifications:

1. Bearing precision index: more than GB/307.1-94 P4 level precision    

2. High-speed performance index: dmN value 1.3~1.8x 106 /min

3. Service life (average): ＞1500 h

The service life of high-speed precision angular contact ball bearings has a lot to do with installation, and the following items should be noted:

1. The bearing installation should be carried out in a dust-free and clean room. The bearings should be carefully selected and matched. The spacer for the bearing should be ground. Under the premise of maintaining the same height of the spacers of the inner and outer rings, the parallelism of the spacers should be controlled at 1um the following;

2. The bearing should be cleaned before installation. When cleaning, the slope of the inner ring faces upwards, and the hand feels flexible without stagnation. After drying, put in the specified amount of grease. For oil mist lubrication, a small amount of oil mist oil should be added;

3. Special tools should be used for bearing installation, and the force should be uniform, and knocking is strictly prohibited;

4. Bearing storage should be clean and ventilated, free of corrosive gases, and the relative humidity should not exceed 65%. Long-term storage should be regularly rust-proofed.