Abstract: A kerfless slitter, capable of cutting various materials without generating chips or sawdust. The slitter includes a circular blade having a plurality of teeth spaced about its outer periphery and which contains a knife-edge centered along the mid plane of the blade in regard to its thickness. In practice, the blade is rotated at a peripheral speed that is equal to the linear speed of the work acted upon whereby each tooth is advanced along a cycloidal path of travel in reference to the work. Each tooth is arranged to enter the work ahead of the cutting line established by the teeth that have previously penetrated the work so that the cut is increased in length and in depth by means of a series of short slits.