What does the term "bearing clearance" refer to?

Bearing clearance refers to the space between the bearing and the shaft or housing. This gap is crucial in ensuring that the bearing can function correctly, as it allows for the necessary movement and alignment of the components. Proper bearing clearance is vital for accommodating thermal expansion, misalignment, and dynamic loads that occur during operation. It also plays a significant role in the lubrication process, as sufficient space is needed for oil or grease to flow and create a protective film between the bearing surfaces and the shaft, reducing wear and preventing overheating.

Understanding bearing clearance is essential for maintaining optimal performance and longevity of machinery. If the clearance is too tight, it can lead to increased friction and wear, while too much clearance can result in instability and noise during operation. Thus, recognizing that bearing clearance specifically refers to the space between the bearing and the shaft or housing is fundamental to effective bearing management and maintenance.