A radial shaft seal, also known as a lip seal, is a type of mechanical seal that is used to prevent fluid from leaking between a rotating shaft and a stationary housing. The seal is typically made from a flexible material such as rubber or thermoplastic, and is designed to form a tight seal around the shaft while still allowing it to rotate freely.
Radial shaft seals are commonly used in a wide range of industrial applications, including automotive, aerospace, marine, and oil and gas industries. They are typically installed in machinery such as pumps, motors, gearboxes, and other rotating equipment where they help to prevent the escape of lubricants or other fluids, as well as keeping out dirt, dust, and other contaminants.