Fan rotor and associated turbojet engine

A fan rotor comprising:

• a disk carrying blades including roots engaged in substantially axial slots in an outer periphery of the disk;
• a substantially frustoconical cap mounted on the disk upstream from the blades;
• retaining means for axially retaining the blades on the disk and comprising a ring mounted in an annular groove of the disk and forming an abutment for the roots of the blades, the ring being festooned or crenellated and co-operating with a festooned radial annular bead of the annular groove of the disk;
• and
• means for preventing the ring from moving in rotation, which means comprises an annulus carrying at least one axial tooth inserted in hollow portions of the bead of the disk and of the ring, the annulus being fastened by bolts on an upstream radial face of the disk;
• wherein the annulus includes lugs extending radially inwards and including holes passing axial bolts for fastening the annulus on the disk, the cap being fastened on the disk by axial bolts passing through the holes in some of the lugs of the annulus, and
• further comprising an indexing peg mounted in aligned holes in the annulus and in the disk and including an upstream head received in a blind hole in an inner radial bead of the cap.