All face seals, because of their design configurations, tolerate only limited axial motion between shaft and housing. Thus, they cannot be used for long stroke, reciprocating-shaft applications.

The team found the tool's accuracy in identifying the marine mammals is close to 100%, which is no small accomplishment in an ecosystem home to thousands of seals ... detect the face in a picture ...

A flexible lip is tolerant of angular misalignment, eccentricity, axial movement, yet produces lower friction than other contact-seal designs. The rotary-shaft axial face seal can be used as a ...