Insert spherical bearing

Insert spherical bearing

Introduction:

The outer spherical ball bearing is actually a variant of the deep groove ball bearing. Its characteristic is that the outer diameter surface of its outer ring is a spherical surface, which can be fitted into the corresponding concave spherical surface of the bearing seat to achieve alignment. Outer spherical bearings are mainly used to bear the combined radial and axial loads, which are mainly radial loads. Generally, they are not suitable to bear the axial load alone.

Although its basic performance should be similar to that of deep groove ball bearings, since most of these bearings are used in relatively rough machinery, the installation and positioning are not accurate enough, the axis alignment between the shaft and the seat hole is poor, or the shaft is long and has deflection In large cases, the accuracy of the bearing itself is not high enough, and some structures are relatively rough, so the actual performance is significantly discounted compared to deep groove ball bearings of the same specifications. For example: an outer spherical ball bearing with a jackscrew is used for a through shaft with poor stiffness and large deflection. This bearing has sealing rings on both sides, which can strictly prevent the intrusion of dirt. It has been filled with an appropriate amount of lubricant before leaving the factory and does not need to be cleaned before installation. , no need to add lubricant, when the jackscrew on the protruding end of the inner ring of the bearing 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 an eccentric sleeve is basically the same as that of the outer spherical bearing with a jackscrew, except that the jackscrew is not on the inner ring, but on the eccentric sleeve. The inner hole of the tapered bore spherical ball bearing is a tapered hole with a taper of 1:12. It can be directly installed on a tapered shaft, or installed on a shoulderless smooth shaft with the help of a tightening bushing, and the bearing clearance can be fine-tuned.

Insert spherical bearings are preferred for applications that require simple equipment and components, such as agricultural machinery, transportation systems or construction machinery.

It is mainly used to bear the combined radial and axial loads, which are mainly radial loads. It is generally not suitable to bear the axial load alone. This kind of bearing can be installed with an inner ring (with a full set of rollers and retainers) and an outer ring respectively. This kind of bearing does not allow the shaft to tilt relative to the housing, and will generate additional axial force under any radial load. The size of the axial clearance of this kind of bearing has a great relationship with whether the bearing can work normally. When the axial clearance is too small, the temperature rise will be high; when the axial clearance is large, the bearing will be easily damaged. Therefore, special attention should be paid to adjusting the axial clearance of the bearing during installation and operation. If necessary, pre-interference installation can be performed to increase the rigidity of the bearing.

Classification:

The outer spherical ball bearing is what is usually called an outer spherical bearing. The reason why it is called a ball bearing is because it is a deep groove ball bearing, and the rolling elements inside are steel balls.

The outer spherical ball bearing is easier to use than the general deep groove ball bearing. Its main features are simple assembly and disassembly and can be adjusted. The standard tolerance of the outer spherical ball bearing is: plus inside and minus outside. The inner diameter adopts plus tolerance to ensure the accuracy when matching with the shaft. Lightweight; each set of outer spherical ball bearings is not used alone. It must be installed inside the bearing seat as a whole. The outer spherical bearing seats have various shapes, so they are suitable for use in a variety of structural positions when combined as a whole. Insert spherical ball bearings can be divided into three categories according to the way they fit with the shaft:

Insert ball bearing with top screw

Its code names are: UC200 series (light series), UC300 series (heavy-duty series), and the deformed product UB (SB) 200 series. If the use environment is small, generally choose the UC200 series, otherwise choose the UC300 series. Generally, there are two jackscrews on outer spherical ball bearings, and the included angle is 120°. Its characteristic is that when it is matched with the shaft, the jackscrew is used to push against the shaft, thereby playing a fixed role, but its matching Environmental requirements require a small vibration range. This kind of outer spherical ball bearing is relatively common and widely used in various manufacturing industries such as textile machinery and ceramic machinery.

Tapered insert ball bearings

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. It must be used in conjunction with an adapter sleeve. The characteristics of this type of outer spherical ball bearing are: it can withstand greater loads than the outer spherical ball bearing with a top wire. load. Because the inner diameter of the matching adapter sleeve of the same model is smaller than that of the spherical outer spherical ball bearing with a top wire. For example, the inner diameter of the UC209 spherical ball bearing with a top wire is 45mm, and the diameter of the shaft used with it is 45mm. If If you change to a tapered outer spherical ball bearing, you can only choose an adapter sleeve with an inner diameter of 45mm, and the only tapered outer spherical ball bearing that matches the 45mm adapter sleeve is UK210 (of course, if the load is higher, you can choose UK310). Therefore, the load endured by UK210 is much greater than that of UC209.

Insert spherical ball 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 degree of eccentricity, and an eccentric sleeve with the same eccentricity matches it. This type of bearing can also be said to be a special bearing, because it is mainly used on agricultural machinery (harvesters, straw returning machines, threshers, etc.). This type of outer spherical ball bearings are mainly used on structures that beat violently, eccentric structures. The cooperation can effectively reduce violent beating.

Double seal

Another feature of spherical outer ball bearings compared with other ordinary bearings is double-layer sealing, because the environmental conditions for use of outer spherical ball bearings are generally harsh, especially for agricultural machinery bearings. The double-layer seal ensures that dust will not easily enter the grooves. In the past two years, some companies have developed three-lip sealed outer spherical bearings, which greatly enhances dustproof capabilities and extends the service life of the bearings.

Type:

Insert spherical ball bearing with seat

A seated outer spherical bearing is a bearing unit that combines a rolling bearing and a bearing seat. Most outer spherical bearings have a spherical outer diameter and are installed together with a bearing seat with a spherical inner hole. They have various structural forms and have good versatility and interchangeability.

At the same time, this type of bearing also has a certain degree of alignment in design, is easy to install, has a dual-structure sealing device, and can work in harsh environments. Bearing seats are generally cast. Commonly used seats include vertical seat (P), square seat (F), boss square seat (FS), boss round seat (FC), diamond seat (FL), ring seat (C), slider seat, etc. ( T).

The outer spherical bearing with a seat is divided into a bearing core and a bearing seat. In terms of name, it is called the bearing center plus the bearing seat. For example, an outer spherical bearing with a set screw UC205 with a vertical seat is called UCP205. Due to the strong interchangeability of seated outer spherical bearings, the bearing core can be installed in bearing seats of the same specifications and different shapes at will.

other

Insert spherical ball bearing with vertical seat

Insert spherical bearing with square seat

Insert ball bearing with diamond seat

Insert ball bearing with circular seat with boss

Insert ball bearing with annular seat

Insert spherical ball bearing with slider seat

Insert spherical ball bearing with suspended seat

Insert spherical ball bearing with suspended seat

Insert ball bearing with adjustable diamond seat

Insert spherical ball bearing with stamped seat

Insert ball bearings with other seats

Features:

The outer spherical bearing has a large radial load carrying capacity.

It consists of an inner ring, an outer ring, rolling elements and a cage. The rolling elements are spherical, and the surfaces of the inner ring and outer ring are concave and convex correspondingly, making its axial load bearing capacity small. Therefore, outer spherical bearings are suitable for large mechanical equipment, such as heavy machinery, construction machinery, etc., and can withstand greater pressure and ensure the normal operation of the equipment.

Secondly, the outer spherical bearing has good self-aligning performance and can automatically adjust the inclination of the bearing and the shaft.

This feature enables the outer spherical bearing to maintain a stable working state under different working conditions, reduce deviations and vibrations caused by equipment operation, and improve the efficiency and reliability of the equipment.

Outer spherical bearings also have better sealing performance.

The bearings are equipped with seals that can effectively prevent dust, pollutants and liquids from entering the bearings, thereby reducing bearing wear and failure. This feature enables outer spherical bearings to adapt to harsh working environments, such as mining, metallurgy and other heavy industrial fields, ensuring long-term operation and stable operation of equipment.

Application areas:

Insert spherical bearings are widely used in automobiles, aviation, aerospace, agriculture and industrial equipment and other fields. Among them, the automotive field is one of the largest markets. Outer spherical bearings are mainly used in components such as engines, transmissions, rear axles and steering gears. They can withstand high-speed rotation, high temperature, high pressure and high impact loads to ensure vehicle performance and safety.

In the aviation and aerospace fields, outer spherical bearings are widely used in aircraft engines, turbochargers, hydraulic pumps, gyroscopes and other equipment. They can withstand extremely harsh environments and high-speed rotation loads, ensuring the normal operation of aircraft.

In the agricultural field, outer spherical bearings are used in agricultural machinery and equipment such as tractors, harvesters, and seeders. They can withstand vibration, impact, and dust erosion, ensuring the stability and reliability of the equipment.

In the agricultural field, outer spherical bearings are used in agricultural machinery and equipment such as tractors, harvesters, and seeders. They can withstand vibration, impact, and dust erosion, ensuring the stability and reliability of the equipment.

In the field of industrial equipment, outer spherical bearings are used in CNC machine tools, robots, wind turbines and other equipment. They can withstand high-speed rotation and complex loads, ensuring the efficient operation and long-term stability of the equipment.

Insert spherical bearings are a type of bearings widely used in mechanical equipment. They have the ability to withstand complex loads and harsh environments. They are indispensable basic parts for the development of modern industry and science and technology.