Method for producing a plain bearing bush

1. A method for producing a plain bearing bush whereby a flat supporting metal layer is provided, an anti-friction layer is provided on this supporting metal layer to produce a flat composite material, and the flat composite material is then rolled into the shape of the plain bearing bush, wherein the flat composite material is rolled in such a way that the supporting metal layer in the plain bearing bush is disposed radially underneath the anti-friction layer, wherein after the rolling the plain bearing bush has open ends running in an axial direction, wherein the open ends are welded to one another such that a weld seam in the axial direction is formed, wherein an oil groove extending in the axial direction is in the plain bearing bush, the oil groove being disposed at a distance from the weld seam, the distance being between 0.5% and 10% of an external circumference of a running surface of the anti-friction layer, and wherein lubricant from a lubricant supply line is fed to the oil groove via a bore running through the supporting metal layer and through the anti-friction layer.

2. A rolled plain bearing bush made from a composite material comprising a supporting metal layer and an anti-friction layer, wherein the supporting metal layer is disposed underneath the anti-friction layer in the radial direction, wherein the rolled plain bearing bush has a weld seam in an axial direction and an oil groove extending in the axial direction, the oil groove being disposed at a distance from the weld seam, the distance being between 0.5% and 10% of an external circumference of a running surface of the anti-friction layer, and wherein a bore runs through the supporting metal layer and through the anti-friction layer, the bore being configured to supply lubricant from a lubricant supply line to the oil groove.

3. A shaft having the rolled plain bearing bush as specified in claim 2 .

4. The shaft according to claim 3 , wherein the rolled plain bearing bush is shrunk onto the shaft.

5. The shaft according to claim 3 , wherein a lubricant supply line is provided in the shaft and feeds into the bore.

6. A wind turbine gear mechanism having at least one gear, having the shaft as specified in claim 3 , and having a bearing point, the at least one gear being mounted on the shaft, the bearing point having the rolled plain bearing bush and being provided between the gear and the shaft.

7. The shaft according to claim 3 , wherein the shaft is a planet gear shaft for a wind turbine gear mechanism.