Non-contact NU-type cylindrical roller bearing with single rib on inner ring

The utility model discloses a non-contact NU-type cylindrical roller bearing with a single rib on an inner ring. The non-contact NU-type cylindrical roller bearing comprises a bearing outer ring, a bearing inner ring and a cylindrical roller, wherein ribs are arranged at two sides of the bearing outer ring; the distance between the ribs at two sides is matched with the length of the cylindrical roller. The non-contact NU-type cylindrical roller bearing is characterized in that the single rib is arranged at one side of the bearing inner ring; a gap is reserved between the single rib of the bearing inner ring and the cylindrical roller and is larger than the axial movement distance of a shaft; a gap is constantly kept between the cylindrical roller and the single rib of the bearing inner ring, and is in a non-contact work state; the outer diameter of the single rib of the bearing inner ring is greater than the diameter of a shaft shoulder. Thus, the dismantling of the bearing from the shaft is facilitated.