Key Considerations With Radial Ball Bearings
Radial ball bearings are rolling-element bearings that support loads and reduce friction between shafts and stationary components in mechanical applications. They are made up of two rings (inner and outer) that are connected by a cage that holds the balls in place. This allows them to rotate freely within the bearing.
These bearings are known for their versatility, durability, and high radial load capacity, making them popular in diverse automotive, aerospace, and manufacturing industries. However, selecting the proper bearing for a certain application necessitates careful consideration of various factors. The following are essential parameters to be aware of when it comes to this bearing type:
1. Load Direction, Type, and Magnitude
The load-carrying capacity of the bearing changes depending on whether the load is applied axially, radially, or a combination of both. For instance, radial loads act perpendicular to the shaft’s axis, whereas axial loads act parallel. Therefore, it is critical to select a bearing that can withstand the exact direction of the load.
Radial ball bearings can be subjected to two types of loads: static and dynamic. Static loads are applied to the bearing at rest, while dynamic loads are exerted in motion. Choosing a bearing that can tolerate certain loads is essential, as dynamic loads expose the component to greater pressures. This will also increase their risk of breaking prematurely.
Another crucial factor is the magnitude of the load, as the bearing’s load-carrying capacity must be greater than the maximum load it would face. Therefore, selecting a radial component with insufficient load capacity might result in premature failure and expensive downtime.
2. Inner or Outer Ring Rotation
Another important factor when choosing a ball bearing is whether the inner or outer ring will rotate during operation. When the inner ring rotates, a sliding motion is created between the rolling elements and the raceway. This sliding motion generates heat, which can cause the component to wear prematurely and fail.
Conversely, when the outer ring rotates, it creates a rolling motion between the rolling elements and the raceway. This motion generates less heat and friction, making it excellent for high-speed, heavy-load applications. However, outer ring rotation might cause misalignment and vibration, potentially leading to component failure.
3. Bearing Size and Type
Bearing size refers to its internal and external dimensions, which should be chosen depending on the application’s specific needs. On the other hand, bearing type is the particular design of the component, such as deep groove, angular contact, or thrust. This can affect its load-carrying capacity, speed, and ability to bear radial or axial loads.
4. Fit Tolerances of Mating Components
Fit tolerance refers to the tightness between the bearing and the other parts, and it can affect weight-carrying capacity, speed capabilities, and performance. For example, an interference fit, which involves pressing the bearing into its housing or onto its shaft, can increase its load-carrying capacity. Contrarily, a clearance fit — where there is a gap between the components — can limit the bearing’s maximum load.
5. Operating Temperature
When the operating temperature of radial ball bearings is high, it can cause the components to expand thermally. This expansion can change the clearance or preload, leading to quick wear and failure. The choice of material is also critical because different materials have varying temperature limits. Therefore, choosing one that can perform optimally under the required operating temperature is important.
6. Running Accuracy
Running accuracy is the ball bearing’s ability to maintain precise dimensional and rotational tolerances, which can impact its performance, speed, and durability. It is often influenced by the manufacturing process, design, and material selection. For example, high-precision bearings are required for applications that demand tight dimensional and rotational tolerances, such as machine tools and aerospace equipment.
Partner With SPB-USA/EZO for High-Quality Bearings
SPB-USA is a top-rated manufacturer of precision bearings, offering an array of sizes and load capacities to meet the demands of diverse applications! Our commitment to quality and dependability is evident in our ISO 9000, ISO 9001, and ISO 14001 certifications. These accreditations ensure our products adhere to strict standards for quality, environmental management, and customer satisfaction.