Supporting bearing for linearly guided travelling units

Supporting bearing for linearly guided travelling units, having a housing which can be fastened on a basic body of the travelling unit by means of screws, and having at least one roller which contains a rolling-contact bearing and of which the inner raceway is seated on an eccentric bolt which is mounted rotatably in the housing for radial adjustment of the roller and can be fixed in the adjusted position by clamping means, and further having means for eliminating the axial play and/or for fixing the axial position of the roller in the housing, characterized in that the housing of the supporting bearing (17) is divided, transversely with respect to the axis of the roller (20), into two housing halves (18a, 18b) which are each provided with a bearing bore (29) for the eccentric bolts (28), and in that the axial position of the roller (20) is fixed by inner wall regions (46) of the housing halves (18a, 18b), which are laid or pressed against the end sides of the inner raceway (27) of the roller (20) after radial adjustment of the roller (20), by clamping the housing halves (18a, 18b) together.