DRILL WITH COOLING CHANNELS AND CHIP EVACUATION CHANNELS (Machine-translation by Google Translate, not legally binding)

Drill bit (1) provided with a handle (2) intended to be attached to a machine tool at a proximal end, a body (3) and a tip (4) with cutting lips (5) at a distal end , provided with at least two helices (6) and at least two strips (7), each strip (7) being provided with an internal helical cooling channel (8) so that a core radius (R n) is defined. the cooling channels (8) being provided with an exit hole in the tip (4) of the drill bit (1), the drill bit (1) being characterized in that it comprises chip evacuation channels (9) in which defined a distal end and a proximal end, the chip evacuation channels (9) being substantially longitudinal in diameter (D n) and being arranged at a distance (R L) from the longitudinal axis (10) of the drill bit (1) so that: {IMAGE-01} and so that the distal end of each chip evacuation channel (9) opens into a cooling channel (8) and the proximal end opens into a surface of the helices (6) whose longitudinal component Orientation has a distal to proximal direction. (Machine-translation by Google Translate, not legally binding) Broca (1) provista de un mango (2) destinado a acoplarse a una máquina-herramienta en un extremo proximal, de un cuerpo (3) y de una punta (4) con unos labios cortantes (5) en un extremo distal, provista de al menos dos hélices (6) y al menos dos fajas (7), estando provista cada faja (7) de un canal de refrigeración (8) helicoidal interno de modo que se define un radio de núcleo (Rn), estando provistos los canales de refrigeración (8) de un orificio de salida en la punta (4) de la broca (1), estando la broca (1) caracterizada porque comprende unos canales de evacuación de viruta (9) en los que se definen un extremo distal y un extremo proximal, siendo los canales de evacuación de viruta (9) sustancialmente longitudinales de diámetro (Dn) y estando dispuestos a una distancia (RL) del eje longitudinal (10) de la broca (1) de modo que: {IMAGEN-01} y de modo que el extremo distal de cada canal de evacuación de viruta (9) desemboca en un canal de refrigeración (8) y el extremo proximal desemboca en una superficie de las hélices (6) cuya componente longitudinal de orientación tiene sentido distal a proximal.