A universal joint contains: a first connector, a second connector, a connection shaft, a first bolt, a second bolt, a first spring, and a second spring. The first connector includes a fitting orifice for fitting with a socket, two first rotatable tabs, and a first accommodation space defined between the two first rotatable tabs. The second connector includes a coupling post for connecting with a wrench, two second rotatable tabs, and a second accommodation space defined between the two second rotatable tabs and configured to receive the connection shaft. The first bolt is inserted through the two first rotatable tabs and the connection shaft, and the second bolt is inserted through the two second rotatable tabs and the connection shaft. When the two first rotatable tabs and the two second rotatable tabs are connected with the connection shat, the first rotatable tabs intersect with the second rotatable tabs.

A method of producing a workpiece having a modified gearing geometry by a generating method includes generating machining the workpiece in at least one machining stroke with a tool having a modified gearing geometry and a topological modification. Provision is made that the contact path with the workpiece is not shifted on the tool during the machining stroke. In one example, a cylindrical workpiece is machined by an axial generating method. In another example, a conical workpiece is machined by a diagonal generating method, and the diagonal ratio is selected such that the contact path does not shift on the tool during the machining stroke.

A method for grinding bevel gears (1), wherein a first grinding tool (2) is used during a first method section and a second grinding tool is used during a second method section. A measurement system (30) is used to carry out a measuring procedure, in which sampling values can be ascertained for at least a part of first flanks of the bevel gear workpiece (1), which enable a statement about the concentricity error of this bevel gear workpiece (1) in the present chucking. Concentricity correction dimensions are ascertained by computer on the basis of the sampling values, and an adaptation of machining movements of the second method section is performed on the basis of the concentricity correction dimensions.

A method of producing a workpiece having a modified gearing geometry by a generating method includes generating machining the workpiece in at least one machining stroke with a tool having a modified gearing geometry and a topological modification. Provision is made that the contact path with the workpiece is not shifted on the tool during the machining stroke. In one example, a cylindrical workpiece is machined by an axial generating method. In another example, a conical workpiece is machined by a diagonal generating method, and the diagonal ratio is selected such that the contact path does not shift on the tool during the machining stroke.