POWER TRANSMISSION MEMBER

An annular power transmission element 22 with a longitudinal axis that has a first annular part 26a, a second annular part 26b with torque transmission means 46a and a third annular part 26c. The first, second and third annular parts are integral with each other. The first annular part 26a and the third annular part 26c are made of a first metallic material and the second annular part 26b is madeof a second metallic material having a density greater than the density of the first metallic material. The second annular part 26b is locked longitudinally between the first annular part 26a and thethird annular part 26c and radially on the first annular part 26a, the first annular part 26a is in contact with the third annular part 26c and welded thereto. 本发明涉及一种具有纵向轴线X的环形的动力传递元件22，包括相互结合的第一环形部件26a、包括扭矩传递设备46a的第二环形部件26b及第三环形部件26c，所述第一环形部件26a和所述第三环形部件26c由第一金属材料制成，所述第二环形部件26b由密度大于所述第一金属材料的第二金属材料制成，所述第二环形部件26b被纵向地锁定在所述第一环形部件26a与所述第三环形部件26c之间，并径向地锁定在所述第一环形部件26a上，所述第一环形部件26a与所述第三环形部件26c接触并焊接到其上。