Cutting instrument and methods for implementing same

Cutting tool of a rotating type, in particular a milling cutter or borer, said cutting tool being provided with a body having a longitudinal axis and at least one flute alternating with at least one active part, wherein

• each active part has a peripheral surface comprising in succession:
• a radial cutting edge,
• a clearance face, to favour the elimination of chips, and
• a control face to control the depth of penetration of the cutting, said control face opening into a flute, and
• said radial cutting edge defines a cutting envelope and is situated at a cutting distance (Rc) from said longitudinal axis,
• said clearance face is defined by an angular clearance length (δd) and is situated at a distance from said longitudinal axis that is the cutting distance (Rc) at a beginning of the angular clearance length (δd) and that is a final clearance distance (Rd) at an end of the angular clearance length (δd),
• said control face is defined by an angular penetration control length (δp) and is situated at a penetration control distance (Rp) from said longitudinal axis, and
• the absolute difference (Δp) between said cutting distance (Rc) and said penetration control distance (Rp) is larger than zero, and smaller than the absolute difference (Δd) between said cutting distance (Rc) and said final clearance distance (Rd), satisfying the relation:
• 0<Δp<Δd, with Δp=|Rc−Rp| and Δd=|Rc−Rd|.