High Sealing Performance and Pressure Resistance During the operation of a differential, pressure fluctuations are generated as the gears stir the lubricating oil, and the drive shafts experience high-speed rotation and axial movement while the vehicle is in motion. Therefore, the sealing components need to have excellent sealing performance, being able to fit the sealing surface when static and withstand internal oil pressure impact under dynamic conditions, while also enduring friction and wear caused by the rotation of the drive shaft, to prevent lubricating oil leakage
Temperature and Medium Resistance and Aging Resistance The gear oil inside the differential has certain chemical corrosiveness, and the differential can generate high temperatures due to friction while the vehicle is running, especially under heavy load or high-speed conditions. Sealing components must be made of materials that are oil-resistant and heat-resistant, and also have good aging and ozone resistance to prolong service life
Structural Compatibility to Adapt to Complex Conditions Differential seals need to have good structural compatibility to accommodate certain eccentricity and shaft wobble, avoiding detachment or damage of the sealing lip caused by shaft movement. Some seals are also designed with dust lips outside the main sealing lip to block mud, dust, and other contaminants from entering, further enhancing sealing reliability and adapting to harsh driving conditions such as off-road or muddy environments