Abstract
By a statistical approach razor blade method (measuring method of wheel surface topography) is analyzed theoretically and experimentally. Results are summarized as follows: (1) The number of effective cutting edges measured by razor blade method is the number of the total effective cutting edges.(2) The density of the total effective cutting edges measured by razor blade method is calculated theoretically. (3) The width of razor blade must be set up so as to satisfy the condition that the averaged number of effective cutting edges simultaneously cut the razor blade is less than 1. (4) The experimental density of the total effective cutting edges is somewhat less than the theoretical one.