In fact, the outer spherical ball bearing is a variation of deep groove ball bearing, characterized by its outer ring outer diameter surface is spherical, which can be matched to the corresponding concave spherical bearing seat to play the role of aligning. Spherical bearings are mainly used to bear radial and axial combined loads, which are mainly radial loads. Generally, they should not bear axial loads alone.
Although its basic performance and deep groove ball bearings should be similar, but because this kind of bearing is mostly used in relatively rough machinery, the installation and positioning is not accurate enough, the axis between the shaft and the seat hole is neutral, or the shaft length and the deflection is large, and the bearing itself is not high enough precision, and some structures are rough. Therefore, the actual performance of deep groove ball bearings of the same specifications should be considerably discounted. For example: the outer spherical ball bearing with top wire is applied to the through shaft with large stiffness difference and deflection. The bearing is equipped with sealing rings on both sides to strictly prevent dirt from invading
Appropriate amount of lubricant, do not need to clean before installation, do not need to add lubricant, the top screw on the convex end of the bearing inner ring is tightened on the shaft. The allowable axial load shall not exceed 20% of the rated dynamic load. The performance of the outer spherical ball bearing with eccentric sleeve is basically the same as that of the outer spherical bearing with jacking wire, except that the jacking wire is not on the inner ring, but on the eccentric sleeve. The INNER HOLE OF THE TAPERED outer SPHERICAL BALL BEARING IS A tapERED HOLE with a TAPER of 1:12, which can be installed directly on the tapered shaft or on the shaft without shaft shoulder with the help of a tight fixed bushing, and the bearing clearance can be adjusted. Spherical bearings are preferred for applications requiring simple equipment and parts, such as agricultural machinery, transportation systems or construction machinery.
It is mainly used to bear radial and axial combined load mainly by radial load. Generally, it is not suitable to bear axial load alone. This bearing can be installed with inner ring (with the whole set of rollers and retainers) and outer ring respectively. This kind of bearing does not allow the shaft to tilt relative to the housing, which will produce additional axial force under radial load. The size of the axial clearance of the bearing has a great influence on the normal operation of the bearing. When the axial clearance is too small, the temperature rise is higher. When the axial clearance is large, the bearing is easy to damage. Therefore, special attention should be paid to adjusting the axial clearance of the bearing during installation and operation, and pre-interference can be installed when necessary to increase the rigidity of the bearing.
External spherical ball bearings can be divided into three categories according to the method of cooperation with the shaft: First, the outer spherical ball bearing with top wire is code-named: UC200 series (light series), UC300 series (heavy series), and UB(SB)200 series of deformation products, if the use of the environment fit small, usually choose UC200 series, otherwise choose UC300 series. Usually, there are two jacking threads on the outer spherical ball bearing, and the Angle is 120°. Its characteristic is that when cooperating with the shaft, the jacking thread is used to push on the shaft and then play a fixed effect. However, the environmental requirements of its cooperation are necessary to oscillate on a small scale. This kind of outer spherical ball bearing is widely used in textile machinery, ceramic machinery and other production professions. Second, with taper external spherical ball bearing its code: UK200 series, UK300 series. The taper inner hole of this kind of outer spherical ball bearing with the inner diameter of 1:12 share should be used in cooperation with the tight sleeve. The characteristics of this kind of outer spherical ball bearing are: it can accept a larger load than the outer spherical ball bearing with the top wire. Because the inner diameter of the same type of tight set sleeve combined with it is smaller than that of the outer spherical ball bearing with top wire, for example, the inner diameter of the outer spherical ball bearing with top wire UC209 is 45mm, and the diameter of the shaft used in cooperation with it is 45mm. If it is changed to the outer spherical ball bearing with taper, the tight set sleeve with inner diameter of 45mm can only be selected. And with 45mm tight sleeve cooperation with taper external spherical ball bearing only UK210 (of course, if the fit is higher, you can choose UK310). Therefore, the fit accepted by UK210 should be much greater than that of UC209. Three, with eccentric sleeve outer spherical ball bearing code :UEL200 series, UEL300 series, SA200 series. The primary feature of this kind of outer spherical ball bearing is that the upper end of the bearing has a certain degree of pain, and there is a pain sleeve with the same degree of pain. This kind of bearing can also be said to be special bearing, because it is mainly used in agricultural machinery (cutting machine, straw returning machine, threshing machine, etc.), this kind of outer spherical ball bearing is mainly used in the layout with strong beating comparison, and the cooperation of biased layout can effectively reduce the strong beating.
