13. Grooves worn into the trunnions by the bearings are called:

These worn grooves are typically referred to as "galling" or "wear tracks." They occur due to continuous motion and pressure, leading to material degradation over time. While this might sound like a minor issue, it can significantly affect equipment longevity and performance, making regular maintenance crucial to prevent costly breakdowns. To tackle this problem, frequent inspections are essential. Look out for early signs of wear and address any issues immediately to prevent further damage. Additionally, implementing proper lubrication strategies can help reduce friction and prolong the life of your bearings and trunnions, keeping operations smoother than a buttered slide!