During a run-in period, how does the temperature of the bearings behave?

During a run-in period, the temperature of the bearings typically experiences an initial decrease, followed by an increase until it reaches a stable equilibrium. This behavior occurs due to several factors related to the breaking-in of the components. Initially, as the bearings begin to operate, there may be a slight decrease in temperature due to the removal of initial lubrication barriers and the settling of components into their operational positions. As the bearings continue to run, friction and contact surfaces heat up, leading to an increase in temperature as they reach optimal operating conditions. Ultimately, once the components have worn in properly and conditions stabilize, the temperature levels off at a steady state, indicating that the bearings are now operating efficiently. This process is essential for ensuring longevity and optimal performance of the bearings in the equipment.