Abstract: A monofilament metal sawing wire for a wire saw, which consists of a metal wire having a diameter D and comprising helical serrations which an amplitude A and wavelength B, wherein the wavelength B is less than 10,000 times the product of the amplitude and the diameter (A×D), and the amplitude A is between 0.010 and 0.400 times the diameter D, the values being expressed in millimeters. Equipment and a method for manufacturing such a wire involve causing the wire to vibrate between two guides while passing the wire between the guides. Such a wire can be used for sawing a block of hard material.