A fluid machinery application (100, 100'), such as a wind turbine arrangement, a water turbine arrangement or a propulsion turbine arrangement, comprising a bearing unit having a double-row bearing, the double-row bearing comprising: a first angular self-aligning contact bearing arranged next to a second angular self-aligning contact bearing for locating and rotatably support a shaft; the first angular self-aligning contact bearing having a first set of rolling elements formed of rollers arranged in a first row and interposed between a first curved inner raceway and a first curved outer raceway, wherein each roller is a symmetrical barrel shaped roller having a curved raceway-contacting surface being engageable with the first curved inner raceway and the first curved outer raceway, and wherein each roller of the first angular self-aligning contact bearing is inclined in relation to the axial direction of the shaft by a first contact angle (α 1); whereby the rollers are arranged to cooperate with the first curved inner raceway and the first curved outer raceway for supporting an axial force (F 1) and a radial force (F 2); the second angular self-aligning contact bearing having a second set of rolling elements formed of rollers arranged in a second row and interposed between a second curved inner raceway and a second curved outer raceway, wherein each roller is a symmetrical barrel shaped roller having a curved raceway-contacting surface being engageable with the second curved inner raceway and the second curved outer raceway, and wherein each roller of the second angular self-aligning contact bearing is inclined in relation to the axial direction of the shaft by a second contact angle (α 2); whereby the rollers are arranged to cooperate with the second curved inner raceway and the second curved outer raceway for supporting the axial force (F 1) and the radial force (F 2); wherein each roller of the first angular self-aligning contact bearing is inclined in relation to each roller of the second angular self-aligning contact bearing such that a first pressure centre (P 1) of the first angular self-aligning contact bearing is displaced from a second pressure centre (P 2) of the second angular self-aligning contact bearing. a first angular self-aligning contact bearing arranged next to a second angular self-aligning contact bearing for locating and rotatably support a shaft; the first angular self-aligning contact bearing having a first set of rolling elements formed of rollers arranged in a first row and interposed between a first curved inner raceway and a first curved outer raceway, wherein each roller is a symmetrical barrel shaped roller having a curved raceway-contacting surface being engageable with the first curved inner raceway and the first curved outer raceway, and wherein each roller of the first angular self-aligning contact bearing is inclined in relation to the axial direction of the shaft by a first contact angle (α 1); whereby the rollers are arranged to cooperate with the first curved inner raceway and the first curved outer raceway for supporting an axial force (F 1) and a radial force (F 2); the second angular self-aligning contact bearing having a second set of rolling elements formed of rollers arranged in a second row and interposed between a second curved inner raceway and a second curved outer raceway, wherein each roller is a symmetrical barrel shaped roller having a curved raceway-contacting surface being engageable with the second curved inner raceway and the second curved outer raceway, and wherein each roller of the second angular self-aligning contact bearing is inclined in relation to the axial direction of the shaft by a second contact angle (α 2); whereby the rollers are arranged to cooperate with the second curved inner raceway and the second curved outer raceway for supporting the axial force (F 1) and the radial force (F 2); wherein each roller of the first angular self-aligning contact bearing is inclined in relation to each roller of the second angular self-aligning contact bearing such that a first pressure centre (P 1) of the first angular self-aligning contact bearing is displaced from a second pressure centre (P 2) of the second angular self-aligning contact bearing.