1. DAC Bearing shares the importance of lubrication

The lubrication of the bearing uses the oil film to separate the relative moving rolling surfaces from each other, so as not to cause excessive wear and failure due to rough point contact. If users attach great importance to bearing lubrication technology, they can ensure stable performance and rotation accuracy during the predetermined working life.

2. Types and performance of grease

The lubrication of rolling mill bearings is divided into grease lubrication and oil lubrication. The advantages of grease lubrication are that the lubrication facilities are simple, the grease is not easy to leak, and it has a certain ability to waterproof, air and other impurities into the bearing. Therefore, grease lubrication is widely used in general. Use oil lubrication under heavy load, high speed, high temperature and other working conditions.

Lubricating grease is composed of base oil, thickening agent and additives. The viscosity of the base oil plays an important role in the lubricating performance of the grease. The composition of the thickener has an important effect on the performance of the grease, especially the temperature characteristics, water resistance, and oil separation. The additives are mainly used to enhance the resistance of the grease. Gasification, rust prevention, extreme pressure and other properties.

Greases are classified according to different types of thickeners, and are divided into lithium-based and nano-based. Lithium-based grease is commonly used for rolling mill bearings. Lithium-based grease is characterized by good water resistance and a high drop point, which can be used on wet and water-contact mechanical parts. Grease is divided into several levels according to its fluidity, namely penetration. The greater the penetration value, the softer the grease.

3. Filling amount of grease

The filling amount of grease should be one-third and one-half of the space between the bearing and the bearing housing. If too much grease is added, the grease will deteriorate or become degraded due to the heat of stirring and sweeping. It should only be filled to one-third or less at high speed. When the rotation speed is very low, in order to prevent external alien physics from entering the bearing, the shell space can be filled.

4. Replacement of grease

The service life of grease is limited, and its lubricating performance gradually decreases during use, and its wear gradually increases. Therefore, it must be replaced every certain time interval.

The replenishment cycle of grease is related to the structure, speed, temperature and environment of the bearing, and should be determined according to the specific working conditions of the enterprise. When replacing the grease, you should pay attention that different grades of grease cannot be mixed. The mixing of different types of thickeners will destroy the structure and consistency of the lubrication. If you must replace the different grades of grease, you should replace the original After the grease is completely removed, add new grease.

DAC is speciality of  Large Bearings ,such as Mill Rolling Bearing  and  Oilfield Machinery Bearing .