Glossary

Lubrication refers to the process of adding a lubricant such as oil, grease, or dry lubricant to a rolling bearing to increase wear resistance and thereby improve the bearing's lifespan.

• Question: What is the function of lubrication?
  • Answer: Lubrication's role is to minimize wear in a rolling bearing. It forms a lubricating film between the moving parts, reducing direct contact, which allows for a longer lifespan and better performance of the bearing.

• Question: What types of lubrication are there?
  • Answer: There are various types of lubrication, including oil lubrication, grease lubrication, and dry lubrication. The choice depends on the specific requirements of the application and operating conditions. Grease lubrication involves introducing lubricating grease into the bearing. The grease forms a lubricating film between the moving parts, reducing friction. On the other hand, oil lubrication uses a special lubricating oil to lubricate the bearings. The oil flows into the bearing points, forming a thin lubricating film that reduces friction and ensures efficient lubrication. Dry lubrication is performed without a liquid lubricant. Instead, dry bearings use self-lubricating materials or coatings to minimize friction and wear.

• Question: Can bearings be used without liquid lubricant (dry lubrication)?
  • Answer: Yes, in some special applications such as high-temperature or vacuum environments, rolling bearings can be used in a dry or dry-lubricated state. These typically utilize self-lubricating materials or coatings. Ceramic bearings can also be used without liquid lubricant.