Patent ID: 8556739

Claim:
A main shaft ( 10 ) for a transmission or countershaft for a transmission, with a base body ( 12 ), said base body ( 12 ) having two ends ( 24 , 26 ), wherein the base body ( 12 ) comprises a tubular inner shell ( 14 ) of a fiber composite material and a tubular outer shell ( 16 ) of fiber composite material, between which inner and outer shells is arranged an open cell foam material ( 18 ), wherein the open-cell foam is a metal foam and is suited for transmitting oil through the open-cell foam between the two shells, and wherein at least one metal element ( 22 ) is arranged at one of the ends of the base body ( 12 ) and laminated to the inner shell ( 14 ) and the outer shell ( 16 ) of fiber composite material.