It mainly bears the radial load, and can bear the smaller axial load at the same time. The axial displacement of the shaft (shell) is limited to the clearance limit, which has the performance of automatic centering, and allows the inner and outer sides to work normally under the condition that the relative tilt of the inner and outer sides is not large. It is suitable for the components whose coaxiality can not be strictly guaranteed by the supporting seat hole.
For heavy load, poor working conditions or special requirements for sealing bearings, the built-in contact seal centering roller bearings can be used. The shape and size of the bearing is exactly the same as that of the unsealed bearing, and it can be used as a substitute for the unsealed bearing in many cases. The allowable centering angle is 0.5 °and the working temperature [2] is-20 ℃ ~ 110 ℃. The bearing has been filled with proper amount of lithium-based antirust grease, and grease can also be added according to user requirements. According to the difference between the inner ring and the cage used, it can be divided into two basic types: type C and type CA. The characteristic of type C bearing is that the inner ring has no flanging and adopts steel plate stamping cage, while the characteristic of CA bearing is that both sides of the inner ring have retaining edges and the solid cages are made of cars. This kind of bearing is especially suitable for working under heavy load or vibration load. The centring roller bearing is equipped with a drum roller between the inner ring with two raceways and the outer ring with spherical raceway.