Ball spherical bearing is more convenient to use than ordinary deep groove ball bearings. Its main features are that it is easy to install and disassemble, and it can be adjusted. The standard tolerance of outer spherical ball bearing is: inner plus outer minus, and the inner diameter adopts plus tolerance to ensure the lightness when matching with the shaft. ;Each set of Ball spherical bearing is not used alone, it must be installed inside the bearing seat as a whole, and the outer spherical bearing seat has various shapes, so it is suitable for use in various structural positions after the overall matching.
Ball spherical bearings can be divided into three categories according to the locking method with the shaft:
Ball spherical bearing with top wire
Its code names are: UC200 series (light series), UC300 series (heavy series), and deformed product UB (SB) 200 series. If the environmental load is small, generally choose UC200 series, otherwise choose UC300 series. Generally, there are two jacking wires on the outer spherical ball bearing, and the included angle is 120°. Environmental requirements must have a small vibration range. This kind of Ball spherical bearing is relatively common and is widely used in various manufacturing industries such as textile machinery and ceramic machinery.
Ball spherical bearing with taper
Its code names are: UK200 series, UK300 series. The inner diameter of this type of outer spherical ball bearing is a tapered inner hole with a ratio of 1:12, which should be used in conjunction with an adapter sleeve. The characteristics of this type of outer spherical ball bearing are: it can withstand larger load. Because the inner diameter of the matching adapter sleeve of the same type is smaller than that of the spherical ball bearing with a top wire, for example, the inner diameter of the spherical ball bearing with a top wire UC209 is 45mm, and the diameter of the shaft used with it is 45mm, and if If it is replaced with a tapered outer spherical ball bearing, only the adapter sleeve with an inner diameter of 45mm can be selected, and the tapered Ball spherical bearing with a 45mm adapter sleeve is only UK210 (of course, if the load is higher, you can choose UK310). As a result, the load that UK210 bears should be much larger than that of UC209.
Ball spherical bearing with eccentric sleeve
Its code names are: UEL200 series, UEL300 series, SA200 series. The main feature of this type of outer spherical ball bearing is that the upper end of the bearing has a certain eccentricity, and an eccentric sleeve with the same eccentricity is matched with it. This type of bearing can also be said to be a special bearing, because it is mainly used in agricultural machinery (harvester, straw returning machine, thresher, etc.) The coordination can effectively reduce the violent beating.
seal
Another feature of Ball spherical bearing compared to other ordinary bearings is the double-layer seal, because the general use environment conditions of Ball spherical bearing are relatively harsh, especially for agricultural machinery bearings, and the double-layer seal ensures that dust is not easy to enter its channel. In the past two years, some companies have developed a three-lip seal outer spherical bearing to greatly enhance the dustproof ability and prolong the service life of the bearing.
