A slitting cutter comprising: a disk-shaped cutter body having a cutter axis of rotation defining a direction of rotation about the cutter axis of rotation, opposing first and second body side surfaces (24a, 24b), and a body peripheral surface extending therebetween, a plurality of insert receiving portions circumferentially spaced about the body peripheral surface and a plurality of cutting inserts removably retained therein, at least radially outer portions of the first and second body side surfaces (24a, 24b) contained in first and second reference planes (P1, P2), respectively, the first and second reference planes (P1, P2) offset by a body width, each insert receiving portion having first and second clamping jaws (32, 34) spaced apart by an insert receiving slot, the first clamping jaw resiliently displaceable relative to the second clamping jaw and having a resilient axis of rotation, each cutting insert resiliently clamped in its respective insert receiving slot, and having a cutting edge intersecting the first and second reference planes (P1, P2), wherein: the plurality of cutting edges define an outer imaginary circle having an outer cutting diameter, and the plurality of resilient axes of rotation define an inner imaginary circle having an inner cutting diameter, and wherein: the number N of cutting inserts resiliently clamped in the slitting cutter, is the inner cutting diameter, in millimeters, multiplied by a spacing factor, and the spacing factor is between 0.15 and 0.30, characterised in that, each cutting edge spans a cutting width greater than the body width, and in that an annular cutting portion is formed between the inner imaginary circle and the outer imaginary circle, having a first radial extent equal to half of the difference between the outer cutting diameter and the inner cutting diameter. a disk-shaped cutter body having a cutter axis of rotation defining a direction of rotation about the cutter axis of rotation, opposing first and second body side surfaces (24a, 24b), and a body peripheral surface extending therebetween, a plurality of insert receiving portions circumferentially spaced about the body peripheral surface and a plurality of cutting inserts removably retained therein, at least radially outer portions of the first and second body side surfaces (24a, 24b) contained in first and second reference planes (P1, P2), respectively, the first and second reference planes (P1, P2) offset by a body width, each insert receiving portion having first and second clamping jaws (32, 34) spaced apart by an insert receiving slot, the first clamping jaw resiliently displaceable relative to the second clamping jaw and having a resilient axis of rotation, each cutting insert resiliently clamped in its respective insert receiving slot, and having a cutting edge intersecting the first and second reference planes (P1, P2), at least radially outer portions of the first and second body side surfaces (24a, 24b) contained in first and second reference planes (P1, P2), respectively, the first and second reference planes (P1, P2) offset by a body width, each insert receiving portion having first and second clamping jaws (32, 34) spaced apart by an insert receiving slot, the first clamping jaw resiliently displaceable relative to the second clamping jaw and having a resilient axis of rotation, each cutting insert resiliently clamped in its respective insert receiving slot, and having a cutting edge intersecting the first and second reference planes (P1, P2), wherein: the plurality of cutting edges define an outer imaginary circle having an outer cutting diameter, and the plurality of resilient axes of rotation define an inner imaginary circle having an inner cutting diameter, and wherein: the number N of cutting inserts resiliently clamped in the slitting cutter, is the inner cutting diameter, in millimeters, multiplied by a spacing factor, and the spacing factor is between 0.15 and 0.30, characterised in that, each cutting edge spans a cutting width greater than the body width, and in that an annular cutting portion is formed between the inner imaginary circle and the outer imaginary circle, having a first radial extent equal to half of the difference between the outer cutting diameter and the inner cutting diameter. the plurality of cutting edges define an outer imaginary circle having an outer cutting diameter, and the plurality of resilient axes of rotation define an inner imaginary circle having an inner cutting diameter, and wherein: the number N of cutting inserts resiliently clamped in the slitting cutter, is the inner cutting diameter, in millimeters, multiplied by a spacing factor, and the spacing factor is between 0.15 and 0.30, characterised in that, each cutting edge spans a cutting width greater than the body width, and in that an annular cutting portion is formed between the inner imaginary circle and the outer imaginary circle, having a first radial extent equal to half of the difference between the outer cutting diameter and the inner cutting diameter. the number N of cutting inserts resiliently clamped in the slitting cutter, is the inner cutting diameter, in millimeters, multiplied by a spacing factor, and the spacing factor is between 0.15 and 0.30, characterised in that, each cutting edge spans a cutting width greater than the body width, and in that an annular cutting portion is formed between the inner imaginary circle and the outer imaginary circle, having a first radial extent equal to half of the difference between the outer cutting diameter and the inner cutting diameter.