High-speed precision angular contact ball bearings, mainly used in high-speed rotating occasions with light load, require high precision, high speed, low temperature vibration and a certain service life. Often used as a pair of high-speed motorized spindle supporting parts installation and use, is the inner surface grinder high-speed motorized spindle key supporting parts.
角接觸球軸承主要技術指標：
Main technical indicators:
1.軸承精度指標： 超過GB/307.1-94 P4級精度
1. bearing accuracy index: exceeding GB/307.1-94 P4 level accuracy
2.高速性能指標： dmN值 1.3——1.8x 106 /min
2. high speed performance index: dmN value 1.3 - 1.8x 106 /min
3.使用壽命（平均）： ＞1500 ha
3. life expectancy (average): > 1500 ha
高速精密角接觸球軸承使用壽命與安裝有很大關系，應注意以下事項：
The service life of high speed precision angular contact ball bearings is very much related to installation.
1.軸承安裝應在無塵，潔凈的房間內進行，軸承要經過精心選配，軸承用隔圈要經過研磨，在保持內外圈隔圈等高的前提下，隔圈平行度應控制在1um以下；
1. Bearing installation should be carried out in a dustless and clean room. Bearings should be carefully selected and matched. Bearing diaphragms should be ground. The diaphragm parallelism of the diaphragms should be controlled below 1um on the premise of keeping the inner and outer diaphragms high.
2.軸承安裝前應清洗干凈，清洗時內圈斜坡朝上，手感應靈活，無停滯感，晾干后，放入規定量油脂，如屬油霧潤滑應放入少量的油霧油；
2. Bearings should be cleaned before installation, cleaning the inner ring slope upward, hand-sensitive flexible, no sense of stagnation, after drying, into the prescribed amount of grease, such as oil mist lubrication should be put into a small amount of oil mist oil;
3.軸承安裝應采用專門工具，受力均勻，嚴禁敲打；
3. bearing installation should adopt special tools, uniform force and no knock.
4.軸承存放應清潔通風，無腐蝕氣體，相對濕度不超 過65%，長期保管應定期防銹。
4. Bearings should be stored in a clean and ventilated, non-corrosive gas, relative humidity does not exceed 65%, long-term storage should be regular anti-rust.
