Rotor disk comprising a variable thickness web

A disk of a rotor comprising, relative to a principal axis of the disk:

• an annular radial web;
• a radially central hub located at an inner radial end of the web;
• and
• a rim located at an outer radial end of the web,
• the web comprising an upstream face and a downstream face, relative to the principal axis of the disk, and a plurality of orifices through which bolts are to pass for attachment of at least one annular flange forming part of another adjacent rotor disk on either the upstream face or the downstream face of the web, or on both faces,
• wherein at least one of said upstream face or said downstream face of the web comprises only a single indentation of generally annular form, a bottom of the indentation is set back along an axial direction inwards into the web, relative to a remaining part of said at least one of said upstream face or said downstream face and that extends radially outwards from the hub of the disk towards the rim, and that surrounds a radially inner part of each of the orifices of the web, at a distance.