A TB type oil seal is a type of rotary shaft seal that is commonly used in various types of machinery and equipment. The TB designation refers to the specific design of the seal, which is a double-lip seal with a rubber outer covering and a metal casing.
The purpose of a TB type oil seal is to prevent the leakage of fluids, such as oil or grease, from a rotating shaft or axle. The seal is typically installed in a housing or a bore, and it fits tightly around the rotating shaft to create a barrier that prevents the fluid from escaping.