Machine element with at least a fitting member pressure-fitted on a shaft.

摘要

A machine element has a shaft (10) and at least a fitting member (20) such as a cam or gear mounted on the shaft by pressure-fit. The fitting member has a bore (25) for receiving the shaft. The shaft is formed with protrusions (12) at least an area (A) of the shaft on which the fitting member is fitted. The protrusions preferably extend continuously or discretely, peripherally or helically on the outer surface of the shaft and have a diameter larger than than the remaining areas of the shaft. The bore of the fitting member is formed with at least an inner chordal surface (22) having a perpendicular from the center of the bore smaller than the radius of the protrusions. The fitting member is configured to be forced onto the protrusions of the shaft with at least one inner chordal surface forming a corresponding outer surface on the protrusions in a shaving and/or deforming operation.