Why is maintaining adequate lubricant film strength crucial?

Maintaining adequate lubricant film strength is crucial primarily because it prevents direct metal-to-metal contact and wear between moving parts. When a machine operates, its components experience significant friction and force. The lubricant forms a protective film that separates these surfaces, reducing the likelihood of wear and damage. If the film strength is compromised, surfaces may come into direct contact, leading to increased wear, overheating, and potential equipment failure. A strong lubricant film also helps manage heat generated from friction, further protecting machinery longevity and performance.

Other aspects such as contamination, lubricant state, and noise reduction are important, but they are secondary to the fundamental function of a lubricant in minimizing direct contact between moving parts.