The Importance of Accurate Application, Protection and Lubrication of Full Complement Cylindrical Roller Bearings

The importance of accurate application, protection and lubrication of full complement cylindrical roller bearings is based on the application site of the full complement cylindrical roller bearing, application conditions and environmental conditions and the selection of suitable full complement cylindrical roller bearings. Longevity and reliability conditions. Application location: Full complement cylindrical roller bearings are suitable for combined radial and axial loads based on radial loads. Usually two sets of TIMKEN bearings are used in pairs. They are mainly used in car front and rear hubs, driving bevel gears and differentials. Transmission parts such as gearboxes and retarders. Allowable speed: In an environment of precise placement and good lubrication, the allowable speed is 0.3-0.5 times the limit speed of the bearing. Usually, 0.2 times the limit rate is very good. Allowable skew angle: Usually, full complement cylindrical roller bearings do not allow the shaft to skew compared to the housing bore. If skewed, the value does not exceed 2'. Allowable temperature: Under normal load, the lubricant has high temperature resistance and sufficient lubrication, allowing general bearings to work at an ambient temperature of -30°C to 150°C. Improper selection of bearing grease accounts for 36% of the premature failure of TIMKEN bearings. General purpose greases cannot meet the needs of a wide variety of special bearing applications. All bearing applications can be satisfied with the application of only one or all general purpose greases. The doubts created will far outweigh the benefits of the same brand. Bearing application conditions vary widely, and precise lubrication requires a grease that matches the bearing application conditions. Full complement cylindrical roller bearing greases are the basis for smooth, worry-free operation and very high reliability of bearings even under very extreme operating conditions. Grease prevents contamination from entering the bearing, cushions shock loads and protects against erosion. In practical applications, selecting a suitable grease is the basic condition for obtaining a very long service life of the bearing. Criteria for precise lubricant selection include full complement cylindrical roller bearing type and size, temperature, speed, load, and expected service life and relubrication interrupts. During the push-in process, the initial radial clearance of the bearing gradually decreases, and the push-in amount determines the degree of cooperation. Therefore, be sure to measure the initial radial clearance of TIMKEN bearings before placement. As the bearing is pushed in, the radial clearance is continuously measured until the required reduction in radial clearance and the ideal interference fit are reached. Because temperature is affected by lubrication, speed, load and environment, the values ​​in the table represent approximate temperature limitations only. Benefits of Bearing Lubrication Lubrication has a major impact on the fatigue life and friction life of rotating bearings, friction, wear, temperature rise, vibration, etc. Bearings will not work without regular lubrication. Analysis of the causes of damage to full complement cylindrical roller bearings shows that about 40% of bearing damage is related to poor lubrication. Therefore, good lubrication of TIMKEN bearings is an effective way to reduce bearing friction and wear. In addition, bearing lubrication also has various functions, such as heat dissipation, rust prevention, sealing and shock mitigation. The benefits of bearing lubrication can be briefly described as follows: a. An oil film is formed between two rotating or sliding surfaces that are in contact with each other to separate the two surfaces, thereby reducing friction and wear on the contacting surfaces. b. When using oil lubrication, especially when using cyclic oil lubrication, oil mist lubrication and oil injection lubrication, the lubricating oil can take away a large part of the friction heat in the bearing and play a useful heat dissipation benefit. c. When using grease lubrication, it can prevent foreign objects such as external dust from entering the full complement cylindrical roller bearing and provide sealing benefits. d. Lubricants have the benefit of preventing metal corrosion. e. Extend the service life of full complement cylindrical roller bearings.

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