Oil seals – often called grease, fluid or dirt seals – close spaces between stationary and moving components in mechanical equipment, helping prevent lubricant escape. They also stop harmful contaminants from entering machinery, particularly in severe environments.

In this blog, we explain which factors you should pay attention to when selecting the best oil seal for your application. The group of oil seals used in dynamic applications include radial shaft seals that seal a rotating shaft around its circumference. They are also known as lip seals, but in this blog we will use the term oil seals.

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油封（oil seal）是一般密封件的习惯称谓，简单地说就是润滑油的密封。 它是用来封油脂（油是传动系统中最常见的液体物质，也泛指一般的液体物质之意）的机械元件，它将传动部件中需要润滑的部件与出力部件隔离，不至于让润滑油渗漏。

Oil seals are widely used as bearing seals and as rotary shaft seals for fast rotary motion under no or very low pressures (max. 7 psi/0.5bar pressure spikes)*. Most oil, grease, and bearing seals with elastomeric seal lips are designed for zero pressure …

Oil seals, often called a rotary shaft seal or grease seal, closes the gap between stationary and moving components in mechanical equipment — most often rotating shafts — helping prevent lubricant escape and stopping harmful materials, such as dirt, from moving in …

Oil seals, also known as rotary shaft seals, grease, fluid, or dirt seals are commonly used to protect shafts and bearings from dirt, foreign matter, and grease and prevent lubricant from escaping. These Oil seals can be metal-cased, metal-enclosed, or rubber covered.

Oil seals, also known as shaft seals or rotary seals, are used to prevent the leakage of lubricants and to keep contaminants out of rotating shafts and bearings. They are critical for protecting machinery and ensuring smooth operation.

Oil seals are crucial for sealing gaps between stationary and moving parts, and play a key role in safeguarding various ball and roller bearings. These seals are essential for shielding rotating shafts and bearings from contaminants and corrosive materials, as well as for preventing the escape of lubricants, oils, and other fluids.