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What Happens if the Hub Bearing is Damaged?

Jul. 09, 2021

The main function of Hub Bearing is to bear the weight and provide precise guidance for the rotation of the hub. It bears both axial load and radial load, and is a very important component. As an Auto Bearing Manufacturer, share with you.

Traditional automobile wheel bearings are composed of two sets of tapered roller bearings or ball bearings. The installation, oiling, sealing and clearance adjustment of the bearings are all carried out on the automobile production line. This structure makes it difficult to assemble in automobile production plants, high cost, and poor reliability, and the bearings need to be cleaned, oiled and adjusted when the automobile is maintained at the repair point. The hub bearing unit is developed on the basis of standard angular contact ball bearings and tapered roller bearings. It combines two sets of bearings as a whole. It has good assembly performance, can omit clearance adjustment, light weight, compact structure, and load capacity. Large, sealed bearings can be pre-loaded with grease, omit external wheel hub seals, and are free from maintenance. They have been widely used in cars, and there is a trend to gradually expand their applications in trucks.

Automotive Bearing

Automotive Bearing

What happens if the car wheel bearing is damaged?

When one of the four wheel hub bearings of the vehicle is damaged, you will hear a continuous buzzing sound in the car while the car is driving. It is hard to tell where the sound is coming from. It feels like the whole car is Full of this hum, and the faster the car, the louder the sound. Here is how to judge:   

Method 1: Open the car window and check whether the sound is coming from outside the car;

Method 2: After increasing the vehicle speed (when the hum is louder), put the gear in neutral and let the vehicle coast, and observe whether the noise comes from the engine. If the hum does not change when coasting in neutral, it is mostly because of wheel bearing problems;   

Method 3: Stop temporarily, get out of the car and check whether the temperature of the wheel axle is normal. The method is: touch the four wheel hubs with your hands, and roughly feel whether their temperatures are the same (when the brake shoe and disc gap is normal, the temperature of the front and rear wheels is If there is a gap, the front wheel should be higher), if you feel that the difference is not big, you can continue to drive slowly to the maintenance station;   

Method 4: Use a lift to lift the car (release the handbrake and put in neutral before). When there is no lift, you can use a jack to lift the wheels one by one, and turn the four wheels quickly by human. When it encounters a problematic axle, it will emit The sound is completely different from other axles. With this method, it is easy to distinguish which axle has the problem.  

If the hub bearing is severely damaged, there are cracks, pitting or ablation on it, and it must be replaced. Before installing a new bearing, apply grease first, and then install it in the reverse order. The replaced bearing must rotate flexibly and be free of miscellaneous and vibration.

Our company also has Automotive Bearing on sale, welcome to contact us.

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