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The following blog gives additional information to Blog 1. This blog will cover an overview of oil seals with an explanation of Oil seal types, oil seal materials, and their uses.

Types of Oil Seal

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Oil Seals can be categorized in different types. As per interactional standards it normally is categorized as per their design aspect.

• Oil seal type or shape-depending on Metal Case
• Oil seal type or shape-depending on Lip Design

Oil seal type or shape-depending on Metal Case

The oil seal consists of a supporting body i.e., a metal case. The metal insert will give rigidity and strength to the seal while it is being held in the bore or recessed groove. It is normally made of cold-rolled steel sheets or other materials such as stainless steel 304, 316 or brass may be used depending on the application. Metal may be either inside or outside.

Oil seal type or shape-depending on Lip Design

The Seal lip is the most important part of oil seal which is always in contact with the shaft and is responsible for providing required sealing. Lip selection is determined by media type, shaft speed, pressure, temperature, and contamination parameters. The media used in most applications are oil or grease. Lip designs generally include a spring when the media is oil because of its higher viscosity than grease. There is also a double spring design when there is media on both sides of the oil seal. Lip designs can also include a secondary lip which purpose is to mitigate particulates from reaching the sealing lip. For added protection of the oil seal from external particles, a V-Ring can be used in conjunction with the oil seal to eliminate particles. Check out our V-Ring section.