Centered double universal joint

A centered double universal joint comprising:

• a first outer joint yoke with two first yoke arms and a first bridge connecting the two first yoke arms, said bridge carrying a first cylindrical bearing journal;
• a first inner joint yoke including a first bearing housing portion;
• a first cross member articulatably connecting the first outer joint yoke to the first inner joint yoke;
• a second outer joint yoke with two second yoke arms and a second bridge connecting the two second yoke arms, said second bridge carrying a second cylindrical bearing journal;
• a second inner joint yoke including a second bearing housing portion, said second bearing housing portion connected to the first bearing housing portion forming an annular guiding recess;
• a second cross member articulatably connecting the second outer joint yoke to the second inner joint yoke;
• a guiding disc having a central guiding projection projecting from the guiding disc on both sides towards the first and the second bearing journal, a continuous cylindrical bearing bore in said guiding projection into which the two bearing journals extend from different ends, said guiding disc being adjustable in the guiding recess;
• one bearing ball per bearing journal, each bearing ball having the shape of a spherical zone and including a through-bore, said through-bore positioning said bearing balls on the bearing journals, said bearing balls held at least axially with reference to an axis of the bearing journals, and said bearing ball including a spherical outer face;
• and
• one bearing race per bearing ball, each bearing race supporting the spherical outer face of the bearing ball in a corresponding hollow-spherical bore enabling said bearing ball to pivot in all directions, and said bearing ball and bearing race forming a pre-assembled unit, said bearing race including a cylindrical outer face adjustably positioned in the cylindrical bearing bore of the guiding disc.