Everyone may know that grease plays a very important role in the use of bearings. Then someone will ask, is it possible to use grease to lubricate the bearing indefinitely? When should the oil be changed and how much oil should be changed? In fact, these problems are complex issues of bearing maintenance technology. To the question of whether grease can be used indefinitely, the answer in the affirmative is no. Because excessive use of grease is harmful to the bearing. Grease has a good effect on bearings. It has good adhesion, wear resistance, temperature resistance, rust resistance and lubricity. It can improve high temperature oxidation resistance, delay aging, dissolve carbon deposits, and prevent metal wear debris. Accumulate with oil stains, improve mechanical wear resistance, pressure resistance and corrosion resistance. However, if the filling amount of grease is more, the friction torque will be greater. With the same filling amount, the friction torque of sealed bearings is greater than that of open bearings. After the grease filling amount is equivalent to 60% of the internal space volume of the bearing, the friction torque will not increase significantly. This is because most of the grease in open bearings has been squeezed out, and the grease in sealed bearings has also been lost. As the amount of grease filling increases, the temperature rise of the bearing increases linearly. With the same filling amount, 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 at most. Generally speaking, the lubrication schedule of bearings is based on time. Equipment suppliers often develop lubrication schedules based on operating hours. Also, equipment suppliers often include guidance on the amount of lubricant during their maintenance planning process. For the staff, it is very common to change the lubricating oil in a short period of time, and often too much lubricating grease is added.  

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