Knowledge of Wheel Hub Bearing Unit for Auto Cars Crankshaft Bearing

The main function of Crankshaft Bearing is to bear the load and provide precise guidance for the rotation of the hub.
It bears both axial and radial loads.Which is a very important component.
It is developed on the basis of standard angular contact ball bearing and tapered roller bearing, which integrates two sets of bearings.

It has the advantages of :good assembly performance,
omission of clearance adjustment,
light weight,
compact structure,
large load capacity,
pre-loading grease for sealed bearings,
omission of external hub seals and maintenance-free, etc.
It has been widely used in cars, and has a trend of gradually expanding its application in trucks.

The range and usage of wheel hub crankshaft bearing units are increasing day by day.Now reached the third generation:
The first generation consisted of double row angular contact bearings.
The second generation has a flange on the outer raceway for fixing the bearing, and the bearing can be simply sleeved on the axle and fixed with a nut. Makes car maintenance easier.
The third-generation hub crankshaft bearing unit is a combination of the bearing unit and the anti-lock brake system ABS.
The hub unit is designed with an inner flange and an outer flange, the inner flange is bolted to the drive shaft, and the outer flange mounts the entire bearing together.

Notes on use and installation:
1. In order to ensure maximum safety and reliability, it is recommended to check the hub crankshaft bearing frequently.Pay attention to whether the bearing has early warning signs of wear. When replacing the brake system, check the bearings and replace the oil seal.
2. If you hear the noise from the hub bearing.First of all, it is important to find the place where the noise occurs.
3. Because the working conditions of the front hub are similar, even if only one bearing is broken, better to replace it in pairs.
4. The hub bearing is more sensitive.In any case, the correct method and suitable tools need to be used. In the process of storage, transportation and installation, the parts of the bearing cannot be damaged.
5. When installing the bearing, it should be in a clean and tidy environment. The entry of fine particles into the bearing will also shorten the service life of the bearing. Maintain a clean environment when replacing bearings.
6. For the hub bearing unit, do not adjust the sealing ring of the hub unitOtherwise the sealing ring will be damaged and water or dust will enter.
7. There is a magnetic thrust ring in the sealing ring equipped with the bearing of the ABS device. This thrust ring cannot be impacted or collided with other magnetic fields.
8. When installing the hub bearing with ABS magnetic thrust ring, point the side with the magnetic thrust ring inward, facing the sensitive element of ABS.
9. Many bearings are sealed, and these bearings do not need to be greased throughout their life. Other unsealed bearings must be lubricated with grease during installation. General experience: During installation, the total amount of grease should account for 50% of the bearing clearance.
10. When installing the lock nut, the torque varies greatly due to the different bearing types and bearing seats.

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