Rolling bearing maintenance needs to pay attention to

In daily car maintenance, we will find that many car owners use butter to lubricate the rolling bearings. In fact, this method is wrong, which will accelerate the early damage of the cross-shaft rolling bearings. Why is this so? What is the correct way to maintain? Today, Asia Fluid Network Xiaobian will answer you one by one.

Because the grease fitting of the universal joint cross-shaft needle bearing is a common grease fitting, because the viscosity of the butter is large, when the grease is used to fill the cavity of the universal joint cross-shaft needle bearing with a grease gun, the butter When entering the narrow inner oil passage, the resistance increases, and the butter pressure rises to overflow the pressure reducing valve opposite the nozzle. This phenomenon can easily be mistaken for the reason why the butter is full.

In fact, the butter does not enter the needle between the needles. When removing the repair, applying the butter to the needle roller and the journal surface may exert some lubrication. Therefore, it is better to use the gear oil lubrication effect. ,This is because:

● Calcium-based grease is a mixture of oil and calcium soap. In use, due to the deterioration and evaporation of lubricating oil, the grease becomes a harder calcium soap. The calcium soap itself can not only play a lubricating role. Moreover, it also hinders the rolling of the needle on the journal, and there is no oil draining measure in the universal joint cross shaft. The deteriorated grease can neither be discharged, and the new oil is difficult to inject, thus greatly accelerating the universal direction. Wear of the cross-shaft needle bearing.

●The needle roller bearing of the universal joint cross shaft can only rotate in the original position during operation, and cannot rotate along the steel bowl and the cross journal. The rolling property of the calcium-based grease is very poor, so the new film cannot be formed immediately after the oil film is destroyed. Oil film.

● The universal joint is subjected to a large torque and alternating load during work, and the oil film of the calcium-based grease is tough, and it is difficult to form a good oil film on the friction surface of the bearing and the journal.

Pay attention when using gear oil. It should be removed after removing the universal joint cross-shaft needle bearing. After removing all the residual grease, put it in the gear oil and soak it for 2min~l0min. In use, it should be noted that the car should be replaced with new oil in time after wading. New oil should be replaced once between 2000km and 3500km. Conditional owners can use special hydraulic filling equipment to regularly lubricate the universal joint cross-shaft needle bearings of the drive shaft.

When we are curing rolling bearings, we only use the correct maintenance method to reduce the occurrence of bearing failures, in order to effectively extend the service life.
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