As you may know, grease is very important in the use of bearings. Then some people will ask, is it possible to use grease to lubricate the bearings indefinitely? When should I change the oil and how much oil should I change? In fact, these problems are complex problems of imported bearing maintenance technology.
The answer to the question of whether grease can be used indefinitely is no. Because too much grease is used, there are many hazards to the bearing.
Grease has a good effect on the bearing, its adhesion, wear resistance, temperature resistance, rust resistance and lubrication are good, can improve high temperature oxidation resistance, delay aging, can dissolve carbon deposits, prevent metal abrasive chips and oil agglomeration, improve mechanical wear resistance, pressure resistance and corrosion resistance.
However, the more grease is filled, the greater the friction torque. With the same amount of filling, the friction torque of a sealed bearing is greater than that of an open bearing. After the grease filling amount is equivalent to 60% of the internal space volume of the bearing, the friction torque is no longer significantly increased. This is due to the fact that most of the grease in the open bearing has been extruded and the grease in the sealed bearing has been lost.
As the amount of grease fill increases, the bearing temperature rises in a straight line, and the same amount of filling, the temperature rise of the sealed bearing is higher than that of the open bearing. It is generally believed that the grease filling amount of sealed rolling bearings should not exceed about 50% of the internal space.
