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What does the longevity in the ball bearing industry mean?

If the bearings work under certain conditions (for example, if they are lightweight), they can have a longer lifespan than they obtain from the formulas. According to this theory, the concept of fatigue load limit is considered, and this is the amount that would not be fatigued if the binge falls below its values. The amount of fatigue load in the tables of the specification of the bings, with the sign Pu, is shown for each buring. Burning fatigue comes from periodic exercise

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