| 摘要 |
To eliminate pins for specifying a vertical position of a metal fixture from a dust cover forming mold to suppress variation in product shape caused by wear of the pins, the ring-shaped metal fixture (1) is embedded in the dust cover (2) to fix the dust cover (2) at an installation position, inner diameter teeth (6) are formed integrally at one end in the axial direction of an outer diameter tube section (4) via a bend (5), the metal fixture (1) is embedded in the dust cover (2) so that one end (5a) in the axial direction of the bend (5) is set at axially the same position as one end face (2a) in the axial direction of the dust cover (2), and groove-like communication sections (8) radially penetrating the bent section (5) are formed in a radial shape at the one end (5a).
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