What Are Grease Seals?


Quick Answer

Grease seals are objects that industrialists use to prevent grease and lubricant from escaping machinery and to keep dirt and other contaminants from entering the machinery. Grease seals are most common in industrial machines and automobiles, and they fill the gap between stationary and moving parts in order make the machines function smoothly.

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Full Answer

Grease seals stop water from entering the machine. This prevents the water from mixing with the machine's oil and lubricants in a harmful way. Industrialists must construct the seals with precision, and they must ensure proper fitting so that the seals work effectively. Both the inside diameter and the outside diameter of a grease seal must precisely match the machine's dimensions, or the seal is not effective. Some styles of grease seals have built-in springs to make the seal more powerful and to create more pressure against the machine.

Some seals consist of metal covered with rubber. Single, consistent materials comprise other types of seals. For effectiveness, a grease seal has a lip that points inward towards the grease that the industrialist wants to contain. A seal might have multiple lips, depending on the needs of the machine. Some grease seals have two, three or even four lips for extra protection if the machine requires it.

Automobile makers use grease seals in engines, axles and shaft applications. Grease seals are generally less expensive than other components of a machine, but when used properly, they add significant life and performance quality to the machinery.

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