Patent ID: 7661928

Claim:
A device for rotationally locking a clamping nut for a bearing outer race, on an end of a hollow shaft having an axial direction, said clamping nut being screwed inside said shaft, and said clamping nut having a first end in contact with said bearing outer race and a second end which is free, wherein the device comprises: at least one shaft cutout disposed on the radially inner periphery of said end of the shaft; at least one nut cutout disposed on the radially outer periphery of an end of said clamping nut; and a locking plug configured to be placed in a locking hole, said locking hole formed by bringing the at least one shaft cutout into coincidence with the at least one nut cutout, wherein said clamping nut includes a radially inner face which is substantially smooth and flares out in a direction towards the second end such that an inner radius at the second end of said clamping nut is greater than an inner radius at the first end of said clamping nut.