The products are widely used in light harrow, medium harrow, heavy harrow, soil preparation machine, ditcher, baler, seeder, combine harvester, header and other equipment. Because the bearing is mainly used in extremely harsh environment, the requirement of sealing is very high. The agricultural machinery bearings produced by our company have round hole, square hole and hexagonal hole structures. The excellent three lip seal design enables the equipment to operate under harsh working conditions. The ST series bearing unit is made of a set of three lip seal bearings and two O-rings riveted with high-strength galvanized sheet. It is of integrated design, easy to use and maintain, and has good self-aligning function, which not only protects the rake blade, but also improves the working efficiency, It can avoid the damage of rake blade under bad working conditions and prolong the service life of bearing.