Self Aligning Ball Bearing：1205 K

In Self Aligning Ball Bearing 1205 K, “1”: Indicates that the bearing type is a self aligning ball bearing. Self aligning ball bearings feature a spherical outer ring raceway and two rows of balls, allowing them to automatically adjust to angular misalignments of up to 2.5 degrees. This unique design makes them ideal for applications where shaft misalignment is likely to occur due to factors like installation errors, thermal expansion, or uneven loads. They are capable of handling both radial and axial loads simultaneously, providing excellent stability and reducing wear on connected components.

“2”: Indicates the bearing’s diameter series code. The diameter series code is used to represent the range of the bearing’s inner and outer diameter sizes. In the case of the 2 series, it typically indicates that the bearing’s dimensions belong to the light series, which means the bearing has a relatively compact size and moderate load-carrying capacity compared to larger series. This makes it suitable for applications requiring a balance of space efficiency and misalignment compensation.

“05”: Indicates the bearing’s inner diameter code. The inner diameter is calculated by multiplying the code by 5, so for the 1205 bearing, its inner diameter is 5 × 5 = 25mm. This size is commonly used in medium-small shaft applications across various industries.

“K”: Denotes a specific feature of the bearing: a tapered bore (1:12 taper) instead of a straight bore. This design allows the bearing to be mounted on a tapered shaft or used with an adapter sleeve, providing easier installation and removal, as well as the ability to adjust the bearing’s position on the shaft for precise alignment.

In the model 1205 K bearing, the tolerance grade is not directly indicated but is usually assumed to be grade 0, the normal precision level. This grade is suitable for most general industrial applications, balancing dimensional accuracy and cost-effectiveness. Higher precision grades can be customized for specific requirements.

In summary, the meaning of the bearing model 1205 K is: self aligning ball bearing, light series, inner diameter of 25mm with a 1:12 tapered bore, normal precision level. This type of bearing is widely used in machinery such as agricultural pumps, small conveyor systems, textile equipment, and industrial fans, where shaft misalignment is common and easy installation/removal is required. Its self-aligning feature and tapered bore design ensure smooth operation, reduce maintenance efforts, and enhance the durability of equipment in various working conditions.