The first part of this paper generalizes the realization of the ration
al design of fluteless taps experience used for the rolling of interna
l threads with small diameters and presents the conditions for the opt
imal exploitation of these taps, The second part of the paper generali
zes the experience of the realization and exploitation of thread-rolli
ng heads for tile rolling of internal threads with large diameters. (C
) 1997 Elsevier Science S.A.