轎車的輪轂軸承過去最多的是成對使用單列圓錐滾子或球軸承。隨著技術的發展，轎車已經廣泛的使用轎車輪轂單元。輪轂軸承單元的使用范圍和使用量日益增長，目前已經廣泛發展使用到了第三代。
第一代是由雙列角接觸軸承組成。
第二代是外圈帶法蘭盤的雙列角接觸軸承單元，可簡樸的將軸承套到輪軸上用螺母固定。使得汽車的維修變得輕易。車輪轂及剎車盤直接安裝在法蘭盤上。
第三代輪轂軸承單元是采用了軸承單元和防抱剎系統相配合的一種結構。輪轂單元設計成有內法蘭和外法蘭，內法蘭用螺栓固定在驅動軸上，外法蘭將整個裝置安裝于車身。
輪轂單元逐步取代輪轂軸承的主要有點：裝車時無需調游隙，組裝工藝更趨合理，輕小型化，可靠性高，維修方便，整體成本降低等。
本公司主要開發第二、三代輪轂軸承單元，已經開發600多個型號。
Development of hub units on automobiles
Automobile hub units is the transmission part connecting the suspension system and the wheels.
The most popular hub bearing used on a Vehicle used to be single row taper roller or ball bearing which are used in pairs. As technology develops, the passenger automobiles have been using sedan hub units. The range and volume of usage have been increasing rapidly. Now it has been generally developed to the third generation.
The first generation is made of dual row angle contact bearings.
The second generation is dual row angle contact bearing units with outer flange. The bearing can be simply attached to the wheel axle and fixed with bolts. This made the repairing of cars much easier. The hub of a vehicle and brake pad can be installed on the flange.
The third generation hub bearing units apply the structure combined by bearing unit and ABS system. Hub unit is designed into inner flange and outer flange, the inner flange is fixed to the drive axle with bolts, while the outer flange connects this whole device to the car.
The advantages of hub units taking the place of hub bearings are, no need to adjust the Clearance when being installed, the assembling mechanics gets more reasonable, it gets lighter while the reliability goes higher, convenient to maintain, the overall cost goes down, etc.
