1. How to tell if the bearings need lubrication or not?
- Lubricating is based on working conditions.
- If the following conditions happened: the bearings have abnormal noise, the grease deteriorated, or the friction increased, it is recommended to replace the grease or lubricant.
- If the lubricant is performing that service well, there should be no need to change it or add more.
2. Typical Lubrication Amount
- The internal space in the bearing was completely filled with grease means 100% full, typically lubrication range from 20% to 40%. In small or miniature bearings grease fill amounts can be as little as 10%.
- Too much grease raises the temperature inside the bearing, excess heat could decrease the effectiveness of the lubricant.
- Adding too much, or not enough grease both lead to the bearing failing prematurely.
- Before operating at full speed, a running-in period is required to allow the grease time to settle into the housing cavity.