Shaft/hub connection with securing system

An assembly, comprising:

• a shaft with an external splining of a limited length located at an end of the shaft;
• a hub with an internal splining extending essentially the length of the hub, the external splining and internal splining engaging each other to permit a transmission of torque between the shaft and hub;
• a first axial securing mechanism between the shaft and hub preventing the hub from axially sliding further onto the shaft, the first axial securing mechanism comprising a stop surface on the hub and a counterpart surface on the shaft;
• and
• a second axial securing mechanism between the shaft and hub, preventing the hub from being pulled off from the shaft, the second axial securing mechanism comprising a securing ring in the form of a round snap ring situated at the end of the shaft and an end of the hub oriented toward the shaft end and that engages in radial recesses in the shaft and hub, the recesses forming contact surfaces for the securing ring on the shaft and hub,
• wherein the radial recess in the shaft comprises a first annular groove with an annular groove diameter (d1) adjoining, in the direction toward the shaft end, an annular groove step with an annular groove step diameter (d2), where d2 is greater than d1, the radial recess forming a first stop surface for the securing ring, and
• wherein the end of the hub oriented toward the shaft end includes a second annular groove forming a second stop surface for the securing ring.