In this paper, the topography for external surface of a grinding wheel after dressing is given by replica method, under the dressing feed f_d=25 μm/rev and f_d=250 μm/rev. From this topography, the relation between dressing feed and distribution in depth of cutting edges formed on wheel surface by dressing operation is shown and the numbers of grains remaining on the surface after dressing operation are drawn. Otherwise, the numbers of grains existing on an ideal section of an actual wheel are calculated, and these results are compared with experimental results. The main results obtained are as follows:
(1) Distribution in depth of cutting edges formed by dressing operation is nomal distribution, and dressing feed influences the standard deviation and the shape of a wheel surface.
(2) Abrasive grains remaining on a wheel surface after dressing operation are about 52% of all grains to exist on the surface, and dressing feed scarcely affects this value.