Overfilling a bearing with too much grease can cause excess churning and high
temperatures during operation. This can create overheating and excess grease
purging (leaking) – see note below. Overheating happens when the generated
heat can’t dissipate correctly, continually building until damage occurs. As the
bearing’s operating temperature rises, the oxidation (breakdown) rate of the
grease sharply increases – doubling every 10° C (18° F).