Abstract: An assembly for supporting a jaw crusher frame on a foundation includes a foot adapted to cooperate with the foundation and the frame for supporting the frame on the foundation and a projection connected to the frame and extending substantially horizontally therefrom, the projection having a mainly downwardly facing supporting surface, which has the shape of a part, spanning at least 180°, of a first circular-cylindrical surface. The foot is adapted for attachment to the foundation and has an upwardly open recess, into which the projection is to be lowered and which has a bottom surface, which has the shape of a part, spanning not more than 180°, of a second circular-cylindrical surface and against which the projection, when lowered into the recess, is to abut with its supporting surface. The first and the second circular-cylindrical surface have substantially the same diameter.