Abstract: A method of producing a sliding sleeve for gearshift mechanisms includes two forming steps. In the first forming step a preform, which has been pushed onto a tool mandrel with an external toothing, is formed by roller spinning so as to form on the inner circumferential surface of the preform the toothing implemented on the outer circumferential surface of the tool mandrel. Subsequently, the thus formed preform is formed by profile rolling on its outer circumferential surface so as to obtain a formed part. Finally, the tool mandrel is removed from the formed part.

Abstract: The present invention relates to a method of producing a sliding sleeve for gearshfft mechanisms. The method according to the present invention comprises two forming steps. In the first forming step a preform, which has been pushed onto a tool mandrel with an external toothing, is formed by means of roller spinning so as to form on the inner circumferential surface of said preform the toothing implemented on the outer circumferential surface of the tool mandrel. Subsequently, the thus formed preform is formed by profile rolling on its outer circumferential surface so as to obtain a formed part. Finally, the tool mandrel is removed from the formed part.

Abstract: The present invention refers to a synchronizer sleeve, and a method of manufacturing a synchronizer sleeve for a change speed gear. The synchronizer sleeve comprises in a known manner a shift fork recess opening towards the outer peripheral surface, and a tooth arrangement formed at its inner peripheral surface. The synchronizer sleeve according to the invention, which can be manufactured at a low price without affecting the wear to resistance, is characterized by a surface hardness of the shift-force recess, which is set by cold rolling, wherein the tooth arrangement is hardened locally, in particular it is hardened inductively. In the method of manufacturing the synchronizer sleeve according to the invention the shift fork recess is ready worked by cold rolling.

Abstract: The present invention relates to a method and an apparatus for producing rotationally symmetric components by means of rolling. For producing a rotationally symmetric component having a profile without any bevels from a blank, the present invention suggests that an annular blank should be deformed into a profiled annular component in a first step by means of rolling between a first inner roll and a first outer roll in a diameter-enlarging mode until the radial growth is limited due to the fact that the profiled annular component comes into contact with at least one additional outer roll. In a second step, the profiled annular component is deformed in a profiling mode between a second inner roll and at least one of said outer rolls on its inner and/or outer circumferential surface(s).

Abstract: The present invention refers to a synchronizer sleeve and a method of manufacturing a synchronizer sleeve for a change speed gear. The synchronizer sleeve comprises in a known manner a shift fork recess opening towards the outer peripheral surface and a toothing formed at its inner peripheral surface. The synchronizer sleeve according to the invention, which can be manufactured at a low price without affecting the wear to resistance, is characterized according to the invention by a surface hardness of the shift-force recess, which is set by cold rolling, wherein the toothing is hardened locally, in particular it is hardened inductively. In the method of manufacturing the synchronizer sleeve according to the invention the shift fork recess is ready worked by cold rolling.