Are there no lubricants in the wheel bearings of cars?
author: Leila
2025-01-03
It is impossible for wheel bearings to be without lubricants. The maximum speed of a car exceeds 120 yards per hour, and the wheel bearings will be replaced at least 200,000 kilometers before they are damaged. No bearing can run at high speed for such a long time without a lubricating medium, so the bearings on the wheels are all lubricated.
Are there no lubricants in the wheel bearings of cars?
Various rolling mechanical parts are inseparable from bearings, so bearing maintenance and lubricating oil filling are also common things. However, it is rare to see cars doing bearing maintenance in life, so there is such a question. The reason why car wheel bearings do not need maintenance is because of the design. If the bearings are sufficiently airtight and foreign matter is blocked outside, the advantages of long-lasting lubricants can be brought into play. As long as there is lubricant, the bearings will not be damaged. Therefore, car bearings have already taken into account future maintenance issues at the beginning of the design, and maintenance-free bearings are used.
However, trucks and vans with strong load-bearing capacity cannot use double-row maintenance-free bearings: this type of bearing has a strong load-bearing capacity, but requires regular maintenance and maintenance, which is commonly known as wheel protection. Some maintenance-free axles do not use maintenance-free bearings, but instead use sealed shell technology. The entire bearing is soaked in gear oil, which is the same as the bearing lubrication method in the differential gearbox.
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