What is one effect of improper lubrication in bearings?

Improper lubrication in bearings can lead to increased heat generation. When bearings are not adequately lubricated, friction between the moving parts is significantly increased. This friction generates heat, which can escalate to levels that may cause failure by damaging the bearing surfaces or causing the grease or oil to break down, further exacerbating wear and tear.

In contrast, proper lubrication reduces friction and helps maintain optimal operating temperatures in machinery. It is essential for the longevity and efficiency of bearings, as adequate lubrication minimizes heat generation, wear, and the risk of mechanical failure. Thus, while options like improved resistance to wear, quieter operation, and longer lifespan would be outcomes of proper lubrication, the clear consequence of inadequate lubrication is indeed the increased heat generation.