What primarily influences the life of a bearing?

The life of a bearing is primarily influenced by load conditions because the amount and type of load exerted on a bearing directly impact its operational efficiency and longevity. Bearings are designed to support specific loads, and when these loads exceed their rated capacity, premature wear and failure can occur.

Different load types, such as radial or axial loads, also affect how the bearing performs under stress. Proper alignment and installation are critical to ensure that loads are evenly distributed across the bearing surfaces, helping to minimize wear and prolong its lifespan. In contrast, overly high or unbalanced loads can lead to excessive heat generation, which further deteriorates the bearing material and lubricant.

Other factors, such as environmental conditions, manufacturer quality, and lubrication type, are important as well, but they primarily serve as secondary influences that can either alleviate or exacerbate the effects of load on bearing life. Therefore, while they contribute to the overall performance and durability, it is the load conditions that have the most significant and direct impact on a bearing's operational effectiveness over time.