230—— Model of cylindrical roller bearing

C3—— Radial clearance of radial bearings is larger than the standard clearance. C3 bearing clearance is generally used where the speed is very high and the vibration is particularly large. C4 is more vibrating than C3. Because it is divided into three groups according to the size clearance, the basic group (or the ordinary group), the small clearance group (C2), and the large clearance group (C3, C4)