UKL metal seal,Extreme Conditions Seals 25 X 47,Extreme Conditions Seals A17 A20,Seals A75 A80 A85 In Stock UKL Bearing Manufacturing Co., Ltd., , https://www.bearingukl.com
How Load-Carrying Capacity Affects Bearing Service Life
Bearings, much like people, are subject to stress. When selecting a bearing, it's crucial to ensure it isn't "overloaded" or "stressed out." In other words, the bearing must be able to handle the actual load it will face throughout its service life. Choosing the right bearing isn’t just about size—it’s about understanding the forces at play and ensuring the bearing can withstand them.
If the load exceeds the bearing’s capacity, it can lead to accelerated wear, plastic deformation, or even catastrophic failure. Two main types of stress should be considered: static and dynamic. Understanding these differences is key to making an informed choice.
Static stress occurs when a load—whether constant or variable—is applied to a bearing that is not rotating or is moving very slowly. This type of stress doesn’t depend on motion but rather on the condition of the bearing itself. If the load is too heavy, it can cause permanent damage, such as flattening the rolling elements or deforming the raceways, which can significantly shorten the bearing’s lifespan.
Dynamic stress, on the other hand, happens when a load is applied to a rotating bearing. Whether the load is steady or fluctuating, if it exceeds the bearing’s capacity, it can lead to early fatigue. Over time, this can result in cracks, flaking, or spalling in critical areas, ultimately leading to failure.
There are several theories about what causes fatigue in bearings. The maximum shear stress theory suggests that the primary cause is the highest shear stress within the bearing. The distortion energy theory focuses on stresses across a region rather than at a single point. However, the most widely accepted theory for calculating bearing life is the alternating shear stress theory, which attributes fatigue to the orthogonal stresses experienced by the bearing during operation.
The rating life of a bearing is defined as the number of revolutions or hours it can operate at a constant speed before 10% of a group of identical bearings show signs of fatigue. As the load increases, the expected life of the bearing decreases. This is why proper load calculations are essential when choosing the right bearing for your application.
At Emerson Bearing, our expert team is here to help you avoid unnecessary stress on your bearings. We understand the complexities of bearing selection and can guide you through the process to ensure optimal performance and longevity. Whether you're looking for technical support, product recommendations, or detailed specifications, we’re here to help.
Contact us today, or explore our **Catalog** and **Technical Toolbox** pages for more information on how we can assist with all your bearing needs. Let us help you keep your machinery running smoothly—without the stress.