Rotary Seals

Selection of standard design
Selection of an oil seal design is dependent on whether the operating conditions exceed the limits of the design. The three operating parameters that mainly affect the design's ability to function are eccentricity, pressure, and shaft speed. In this section, these limits are reviewed.

"S" and "T" LIP DESIGN Table I illustrates standard seal designs, beginning with "S" and "T" lip symbols for general non-pressure applications. The "S" design is a single lip oil seal with a garter spring to provide a consistent radial load against the shaft. The "T" design use the same primary lip configuration, with an auxiliary dust lip provide effective light duty dust exclusion.