A testing device (1) for a thin-walled large bearing is provided with: a surface plate (2) on which it is possible to install a thin-walled large bearing (60) to be tested a surface plate support mechanism (3) that tiltably supports the surface plate (2) around a central tilt axis (12) a drive device (4) for angle variation that changes the tilt angle of the surface plate (2) and a motor (52) for bearing rotation that causes the inner ring of the bearing (60) to rotate. The surface plate support mechanism (3) and the drive device (4) for angle variation make it possible to change the horizontal orientation, the vertical orientation, and the tilt orientation of the surface plate (2). The surface plate (2) is provided with a bearing installation mechanism (6) that is used to mount the bearing on the surface plate (2) with the outer ring of the bearing (60) in a fixed state. As a result of configuring in this manner, it is possible to easily and precisely install the thin-walled large bearing (60) to be tested and to carry out performance evaluation testing by tilting the installed thin-walled large bearing (60) so as to have a discretionary orientation.Le dispositif dessai pour roulement de fine épaisseur et grande dimension (1) de linvention, est équipé : dune plaque (2) permettant de placer un roulement (60) de fine épaisseur et grande dimension faisant lobjet de lessai dun mécanisme de support de plaque (3) supportant la plaque (2) tout en permettant son inclinaison autour dun axe central dinclinaison (12) dun dispositif dentraînement pour modification dangle (4) changeant langle dinclinaison de la plaque (2) et dun moteur pour rotation de roulement (52) qui met en rotation une bague intérieure du roulement (60). Le mécanisme de support de plaque (3) et le dispositif dentraînement pour modification dangle (4) permettent des changements vis-à-vis de la plaque (2) en termes de positionnement horizontale, de positionnement verticale et de positionnement dinclinaiso
