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An oil seal, also known as crankshaft retainer, is a small device, but essential to ensure the proper engine operation. It plays a key role in all moving parts of an engine, acting as a physical barrier. This mechanical seal fulfils the dual purpose of sealing a rotary shaft to maintain the necessary lubrication (avoiding leaks) and preventing other foreign matter from contaminating shafts and bearings in the rotary shaft equipment.
Lastly, the 7% represents the fillers used in the oil seal's construction. These fillers, such as carbon black or glass fibers, enhance the physical properties of the rubber These fillers, such as carbon black or glass fibers, enhance the physical properties of the rubber
These fillers, such as carbon black or glass fibers, enhance the physical properties of the rubber These fillers, such as carbon black or glass fibers, enhance the physical properties of the rubber
20 30 7 oil seal. They improve the seal's, heat resistance, and chemical stability, thereby optimizing its performance in harsh environments.

