| 摘要 |
PROBLEM TO BE SOLVED: To provide a full floating type bearing device for a wheel that is improved in workability at disassembling and is improved desirably in airtightness even though a seal ring is erroneously assembled at assembling, thereby enhancing reliability.SOLUTION: A sealing ring 29, formed of synthetic rubbers to have an approximately rectangular cross section, has, in the outer diameter thereof, a cylindrical straight portion 29a and annular protrusions 30 and 30 formed protruding outward in a radial direction from the straight portion 29a; and has, on both ends thereof, protrusions 32 and 32 formed symmetrically protruding in an axial direction, where the protrusions 32 and 32 are contacted with a wall surface 28a of an annular step 28 and a shoulder portion 1a of an axle tube 1 respectively via predetermined interferences. |
