received by the International Bureau on 15 January 2019 (15.01.2019)

1 . A disk clutch (2), preferably a wet-running disk clutch (2), particularly preferably a hydraulically actuatab!e disk clutch (2), comprising a first disk set (32) which is connected rotationally fixed to a first disk carrier (18) and a second disk set (42) which is connected rotationally fixed to a second disk carrier (24), wherein the disks (34 through 40, 46 through 52) of the two disk sets (32, 42) may be brought into frictional engagement with one another via friction surfaces (54, 56), wherein recesses and/or grooves are provided in at least one or more friction surfaces (54, 56) of the disks (34 through 40; 46 through 52) of the first and/or second disk sets (32; 42), characterized in that a first type of recesses and/or grooves (68) is provided, which is generated by a material shaping and/or a material casting and/or a non-material removing first manufacturing method, and a second type of recesses and/or grooves (70) is provided, which is generated by a material removing second manufacturing method.

2. The disk clutch (2) according to Claim 1, characterized in that the first type of recesses and/or grooves (68) is generated by stamping and/or the second type of recesses and/or grooves (70) is generated by a mechanical manufacturing method, preferably by milling.

3. The disk clutch (2) according to one of Claims 1 or 2, characterized in that the first type of recesses and/or grooves (68) have a lesser depth than the second type of recesses and/or grooves (70).

4. The disk clutch (2) according to any one of the preceding claims, characterized in that the at least one friction surface (54; 56) or the multiple friction surfaces (54, 56) is/are formed by a friction lining (60, 62) fixed on a friction lining carrier (58), preferably by a paper friction lining, wherein the friciion lining (60, 62) is particularly preferably glued on the friction lining carrier (58), and/or fixed on the friciion lining carrier (58) in segments, if necessary, while generating an intermediate third type of recesses and/or grooves (72).

5. The disk clutch (2) according to any one of the preceding claims, characterized in that the disks (34 through 40) of the first disk set (32) are provided on both sides with the friction surfaces (54, 56) with the recesses and/or grooves (68, 70), whereas the disks (44, through 52) of the second disk set (42) have no friction surfaces (54. 56) provided with recesses and/or grooves, or the disks (34 through 40, 44, through 52) of the first and second disk sets (32, 42) each have a first friction surface (54) with the recesses and/or grooves (68, 70) and a second friction surface (56) facing away from the first friction surface (54) without recesses and/or grooves,

6. The disk clutch (2) according to any one of the preceding claims, characterized in that at least one of the disks (34 through 40, 44 through 52) has both the first type of recesses and/or grooves (68) as well as the second type of recesses and/or grooves (70), wherein both the first type of recesses and/or grooves (68) as well as the second type of recesses and/or grooves (70) are preferably provided in one or both friction surfaces (54; 56) of this at least one disk

(34 through 40, 44 through 52).

7. The disk clutch (2) according to any one of Claims 1 through 5, characterized in that at least one of the disks (34 through 40, 44 through 52) has the first type of recesses and/or grooves (68), however not the second type of recesses and/or grooves (70). whereas at least one other of the disks (34 through 40, 44 through 52) has the second type of recesses and/or grooves (70), however not the first type of recesses and/or grooves (68).

8. A disk (66) for a disk clutch (2) according to any one of the preceding claims, comprising at least one friction surface (54; 56), characterized in that in the at least one friction surface (54; 56), a first type of recesses and/or grooves (68) is provided, which is generated by a material shaping and/or a material casting and/or a non- material removing first manufacturing method, preferably by stamping, and a second type of recesses and/or grooves (70) is provided, which is generated by a material removing second manufacturing method, preferably by a mechanical manufacturing method, particularly preferably by milling.

9. A method for producing a disk clutch (2) according to any one of Claims ! through 7, comprising the method steps: providing d isks (34 through 40, 44 through 52), preferably disks (34 through 40} of a first disk set (32) connectable a first disk carrier (18) and of a second disk set (42) connectable to a second disk carrier (24), generating a first type of recesses and/or grooves (68) by a material shaping and/or a material casting and/or a non-material removing first manufacturing method, preferably by stamping, in the friction surfaces (54; 56) of at least one of the disks (34 through 40, 44 through 52), generating a second type of recesses and/or grooves (70) by a material removing second manufacturing method, preferably by a mechanical manufacturing method, particularly preferably by milling, in the friction surfaces (54; 56) of the at least one disk (34 through 40, 46 through 52), and/or in the friction surfaces (54; 56) of at ieast one other disk (34 through 40, 44 through 52), and compiling a disk set (30) from the disks, including the disks (34 through 40; 44 through 52) having the grooves and/or recesses, wherein preferably the disks (34 through 40) of the first disk set (32) are connected to a first disk carrier (18) in such a way, and the disks (44 through 52) of the second disk set (42) are connected to a second disk carrier (24) in such a way that their friction surfaces (54, 56) may be brought into frictional engagement with one another.

10. A method for producing a disk (66) according to Claim 8, comprising the method steps: providing a disk (66) with at least one friction surface (54; 56), generating a first type of recesses and/or grooves (68) by a material shaping and/or a material casting and/or a non-material removing first manufacturing method., preierably by stamping, in the at least one friction surface (54; 56) of the disk (66), generating a second type of recesses and/or grooves (70) by a material removing second manufacturing method, preferably by a mechanical manufacturing method, particularly preferably by milling, in the at least one friction surface (54; 56) of the disk (66), wherein the providing of the disk (66) preferably comprises providing a friction lining carrier (58) and fixing of a friction lining (60, 62), if necessary a paper friction lining, on the friction lining carrier (58) to form the at least one friction surface (54; 56), and the fixing is carried out particularly preferably simultaneously with the generation of the first type of recesses and/or grooves (68).

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