the presence of ring portion 34 is not absolutely necessary a fluid or gas tight seal could be established between seal body 30 and a radial surface within bore 16 without ring portion 34 as will be explained extending radially inwardly from ring portion 34 is radial body portion 38 body portion 38 is located at the inboard axial end of seal 20 which is the end toward internal housing chamber 24 when seal 20 is installed the opposite or outboard axial end of seal 20 faces the external environment or atmosphere 26 body portion 38 defines radial face 40 in the installed position of seal 20 face 40 contacts radial shoulder 18 of housing 14 to provide a fluid tight seal this seal could serve as the only static seal between housing 14 and seal body 30 e g in the absence of ring portion 34 an annular undercut or recess 42 is formed in face 40 near a radially innermost extent of body portion 38 extending from body portion 38 are primary lip 44 alignment lip 46 and outboard lip 48 each lip is in circumferential contact with shaft 10 when seal 20 is in its installed position thus in the uninstalled position of seal 20 each of the lip components should have an inside diameter considerably less than the outside diameter of shaft 10 conical primary lip 44 is joined to and supported upon body portion 38 by annular base portion 50 annular base portion 50 extends inboard of radial face 40 an axial distance approximately equal to the axial thickness of body portion 38 it is substantially coaxial with ring portion 34 and defines an outer cylindical surface 45 adjacent undercut 42 and.