Centering device

A gas turbine engine comprising a rotating member, a support structure and a centering device, the centering device centers the rotation of the rotating member which is supported within the support structure, characterized in that the device includes a first member and a second member that contact one another, one of the first and second members extending from the rotating member and the other of the first and second members extending from the support structure, the first member comprises a biasing surface and the second member comprises a seating surface, the device requiring a predetermined force to be applied to move between a centered condition and a first out of center condition and in the centered condition the first member is seated against the seating surface of the second member, and in the first out of center condition the first member contacts the biasing surface which is arranged to provide a biasing force to bias the device to the centered condition.