Angular contact ball bearing

Angular contact ball bearings, when used alone, can withstand radial loads and axial loads in one direction; when used in pairs, they can withstand radial loads and axial loads in both directions; moreover, angular contact bearings also offer higher precision and higher rotational speeds.

Single row angular contact ball bearing

Single-row angular contact ball bearings can only withstand axial loads acting in one direction. Under radial loads, an axial force will occur within the bearing, which requires adjustment with a counteracting force. Therefore, such bearings generally require a second bearing for balancing.

Single-row angular contact ball bearings can accommodate a larger number of steel balls, providing the bearings with higher load-bearing capacity. There are three types of contact angles: 15°, 25°, and 40°, with suffix designations C, AC, and B, respectively. Single-row angular contact ball bearings are divided into two categories: non-separable and separable. Non-separable bearings are further categorized into three series based on different applications: standard, high-speed, and ultra-high-speed. The inner and outer rings of separable bearings can be installed separately and are only used in components where installation space is limited, such as magnetos. This type of bearing is also known as a magneto bearing.

For non-separable bearing cages, the standard structure is a fiber-reinforced phenolic resin cage guided by the inner ring, which is not indicated in the bearing code. When other cages are used, they are indicated by corresponding suffix codes:

TA: outer ring guided fiber-reinforced phenolic resin cage

TN: Reinforced nylon 66 molded cage

M: Brass machined cage

Separated bearings (i.e., magneto bearings) primarily utilize reinforced nylon 66 molded cages. If required, bearings with brass plate stamped cages can also be provided.

Bearings with reinforced nylon 66 molded cages are suitable for most applications and can operate normally at temperatures ranging from -30℃ to 120℃.

Based on the structural characteristics of single-row angular contact ball bearings, these bearings are typically used by combining two or more bearings of the same model. When paired or multi-coupled bearings are installed, a certain preload must be applied. Choosing an appropriate preload can enhance the rigidity of the spindle system, reduce temperature rise, and improve system machining accuracy. Bearing preloads are categorized into three levels: light (A), medium (B), and heavy (C). Users can select according to the actual operating conditions of the spindle system. Single-row angular contact ball bearings with a 40° contact angle (suffix B) are produced in two types for different applications. The first type is suitable for configurations where only one bearing is placed at each bearing position. The other type is suitable for configurations where two or more bearings are installed adjacent to each other in any combination (general-purpose pairing). Bearings designated for general-purpose pairing, after special design and manufacturing, can be installed adjacent to each other in any combination without the need for adjusting shims or similar devices to achieve the predetermined axial clearance and uniform load distribution. Bearings designated for general-purpose pairing are denoted by the suffix CB, where C indicates the presence of clearance and B indicates the size of the clearance value. Bearings with smaller or larger clearances are also available (suffixes CA and CC, respectively). For preloaded bearings, light preload, medium preload, and heavy preload are denoted by suffixes GA, GB, and GC, respectively (G indicates the presence of preload or negative clearance). When ordering bearings for general-purpose pairing, such as 7206BTNCB, the required number of individual bearings must be specified.

Angular contact ball bearing

1. One side features a ball-retaining notch. This design allows for the use of larger and more steel balls, capable of withstanding higher radial loads and unidirectional axial loads. Generally, steel plate stamping or machined brass solid cages are used, suitable for applications with lower rotational speeds.

2. Without a ball-retaining notch, this design can withstand equal axial loads in both directions. It utilizes a glass fiber-reinforced nylon 66 cage or a steel plate stamped crown-shaped cage, which keeps the bearing from generating much heat. As a result, the operating temperature remains low, a significant advantage especially during high-speed operation.

3. Equipped with dust covers or sealing rings, this design offers dual-sided or single-sided dust covers (non-contact type) or sealing rings (contact type).

These sealed bearings are filled with rust-preventative and lubricating dual-purpose grease. When there are no special requirements, lithium-based 2# grease is used, with an operating temperature range of -30 to 100℃. They utilize permanent lubrication and require no maintenance. Before installation, they should not be heated or cleaned. Bearings with dust covers are primarily used in situations where the inner ring rotates. When the outer ring rotates, if the speed exceeds a certain value, there is a possibility of lubricating grease overflowing.

In bearings with sealing rings on both sides, the sealing lip abuts against the groove on the shoulder of the inner ring. The sealing ring is made of oil-resistant and wear-resistant rubber, reinforced with steel sheets. The allowable operating temperature for the seal is -40 to 120℃. The outer sealing ring is clamped in the groove on the shoulder of the outer ring, sealing the outer ring without deformation. The oil seal lip exerts a slight sealing pressure on the inner ring.

Under harsh conditions, such as extremely high rotational speeds or operating temperatures, the inner ring may leak lubricating grease. If the bearing configuration does not allow for grease leakage, special design measures may need to be taken.

For ball or roller bearings to operate satisfactorily, they must bear a certain minimum load. This is no exception for double-row angular contact ball bearings. Otherwise, during high-speed operation, the inertial forces of the balls and the cage, as well as their friction with the lubricant, can adversely affect the rolling condition of the bearing, potentially causing destructive sliding between the raceway and the balls.

Product Features: High limit speed, suitable for high-speed applications; bearing stiffness can be improved through pre-tightening; multiple assembly options for ease of use.

Application areas: precision machine tools, pulp and paper manufacturing, steel rolling, motors, fans, and various general-purpose mechanical equipment.