ROLLING MILL AND ROLL THEREOF

摘要

The present invention relates to a rolling mill and a roll thereof, and more particularly to a roll coupled to a separately manufactured axle and rotating together with the axle in order to perform a rolling process. The roll according to the present invention comprises an inner cylindrical surface, an outer cylindrical surface and both side faces, and at least one key way provided on at least one of the side faces is arranged adjacent to the inner cylindrical surface rather than said outer cylindrical surface, wherein said key way is in a concave curved shape and is a portion of a spherical surface or of an ellipsoidal surface.