A method for providing a bearing 227 on to an annular inertia member 202, possibly of a torsional vibration viscous fluid damper, involves placing at least part of the member 202 in to a two-piece 204, 209 mould so as to define a cavity 208 between the outer surfaces 212, 217 of the member 202 and the inner surface of the mould and injecting a plastic/nylon bearing material in to the cavity 208 via a plugged 214 aperture 213, so as to form a bearing surface 227 directly in to the inertia member 202. The bearing surface may be applied to any or all of the surfaces of member 202 and in a case where all surfaces are moulded on to, the bearing material formed on the radially inner periphery (320, Fig 5) is thicker than that formed on the outer periphery (331). Supporting stud members may be provided so as to support the inertia member within the mould.; Inertia member 202 may have a V-shaped annular groove reservoir 11 on its radially extending surface 212. A comparable method for constructing a torsional vibration viscous fluid damper, and such a damper per se, are also disclosed.
|Publication status||Published - 29 Oct 2003|