Angualr contact ball bearing
3315A/C3
7216BECBP

Single-row angular contact ball bearing comprises an outer race, aninner race, a row of steel balls and a holder. This type of bearingcan simultaneously subject to radial load and axial load. It canalso be subject to pure axial load and operate in high-speed.Single-row angular contact ball bearing can only be subject toaxial load from one direction. When being subject to radial,additional axial force will be caused, and only the axialdisplacement of shaft and housing in one direction will belimited.

Though this type of bearing can only be subject to unidirectionalaxial load, it can combine with another bearing being subject tonegative direction load. If the bearings are combined and mountedin pairs, the same outer race ends of a pair of bearing are made tobe opposite, namely the wide end is opposite to the wide end (backto back dB) while the narrow end is opposite to the narrow end(face to face DF), the cause of additional axial force will beavoided, and shaft and housing will be limited in axial windagerange in two directions.

Ball charge of single-row angular contact ball bearing is largerthan deep groove ball bearing of the same dimension. So its ratedload is the largest in ball bearings, its rigidity is strong, andits operating is smooth. Radial windage can be adjusted byutilizing mutual displacement of the inner race and the outer race,and preload can be generated by connecting several sets ofbearings, so that the rigidity of the system will be enhanced.

The characteristic of this type of bearing is that the contactangle is not zero. Standard contact angle of single-row angularcontact bearing are respectively 15° , 25° , 30° And 40° . Themagnitude of the contact angle determines radial force and axialforce bearings can be subject to when working. A large contactangle indicates a great axial load capacity of the bearing. But asmaller contact angle is favorable for high-speed rotation.

Single-row angular ball bearing is not provided with windage. onlymatched angular contact ball bearing has inner windage. Accordingto work condition requirements, matched bearings are divided intotwo types, namely preload (preloaded load) and pre-windage (presetwindage). The inner windage of preload matched angular contactbearing is 0 or negative. The preload matched angular contactbearing is mainly applied on machine tool main shaft to improverigidity and running accuracy of the main shaft. The windage(preload) of paired angular contact bearing has been adjustedbefore leaving factory, so user does not need to adjust it. Thewidth tolerance and end projection amount of normal singlesingle-row angular contact ball bearing is produced according toplain grade, so the bearings can not be paired and matched atwill.