Abstract: The hypocycloidal flanks of the cylindrical gear teeth have the flank lines defined by lengthened or shortened hypocycloid and the profile involute. The curved and bulged flanks have some advantages, among them being the increased strength in bending and controlled positioning of the contact imprint. The tooth flank generation has on the basis the application of the technological process of milling using a cutting tool with multi-cutters by rolling with mobile line and continuous division. In the paper, the components of the cutting motion and their speed are analytically and numerically established. The cutting motion is the resultant of the relative motions that are simultaneously performed between the cutting edges of the cutters and tooth flanks. The real speed is determined by three groups of parameters: of motion, constructive, of position. One presents the results of some numerical and experimental applications regarding the tooth processing on a machine of FD Cugir family.