Heavy-duty trucks and commercial vehicles operate under continuous heavy loads, frequent starts and stops, and complex road conditions. As key sealing parts, oil seals are widely used in axles, wheel hubs, differentials and transmission shafts. Reliable sealing performance can effectively prevent grease leakage and isolate external dust, mud and moisture. Reasonable material and structural selection can greatly improve the durability and maintenance-free performance of oil seals, adapting to long-distance transportation and high-intensity working environments.