An oil seal is a piece that is mounted around the rotating shaft of a machine or mechanism, which isolates it from dust and dirt and prevents lubricant leaks. The seals are normally made up of a rubber part (lip), a metal frame and a helical spring:
Lip: composed of a flexible rubber membrane, intended to wrap the shaft, and create watertightness. The choice of material is intended to give the seal:
• Stability to the fluid with which it comes into contact.
• High degree of elasticity.
• Wear resistance.
• Low coefficient of friction.
Metallic armor: designed to give the ring the necessary rigidity for a stable coupling with the pocket. The metal part of a seal can be internal to the rubber part, external, or covered by half of rubber (through a vulcanization process).
Spring: It has a complementary function to the action of the lip. In fact, heat, mechanical deformations, and the chemical action of fluids modify the original characteristics of the rubber. The original radial force, exerted by the lip, therefore tends to decrease. The function of the spring is to counteract this tendency.
We have a wide range of seals in NBR and FKM in accordance with DIN3760, both for industry and automotive.
