1200 TO 1224 (2.5 DEGREE) , 1300 TO 1322 (3.0 DEGREE) , 2200 TO 2224 (2.5 DEGREE), 2304 TO 2320(3.0 DEGREE)
This type of ball bearing is immune to misalignment between the shaft and the housing which may happen due to shaft deflection or mounting errors.
The inner ring has deep grooves similar to deep groove ball bearings followed by two rows of balls and the outer ring. The outer ring has a concave shape and this grants the inner ring some freedom to rearrange itself depending on the misalignment.