Machining tool for deburring boreholes

A machining/cutting tool, for deburring boreholes that lead laterally into a recess, comprising:

• a shaft,
• a cutting head with at least one circumferential cutting blade which is associated with a chip groove and which has a cutting edge, which extends, at least in sections, in an axial direction, and which is configured to perform a cutting process by virtue of a relative movement between the tool and a work piece, and lies on a virtual cylindrical rotation surface a diameter of which corresponds with a nominal diameter of the machining tool, and at least one cutting-blade-free and chip-groove-free surface area,
• at least one fluid channel closed on a cutting head side, which extends through the shaft into the cutting head, and
• at least one branch channel emanating from the fluid channel with an outlet opening in the cutting-blade-free and chip-groove-free surface area,
• the outlet opening located in the cutting-blade-free and chip-groove-free surface area in a dynamic pressure active surface which is radially set back in relation to the virtual cylindrical rotation surface of the cutting head and which is larger than a flow cross-sectional area of the at least one branch channel at the outlet opening,
• wherein the cutting head has a multiplicity of cutting blades with straight grooves.

A machining/cutting tool, for deburring boreholes that lead laterally into a recess, comprising:

• a shaft having a shaft axis the tool configured to be rotated about the shaft axis,
• a cutting head having at least one circumferential cutting blade which comprises a straight groove and which has a cutting edge, which extends, at least in sections, in a first direction that is parallel to the shaft axis, and which is configured to perform a cutting process by virtue of a relative movement between the tool and a work piece, the cutting edge lying on a virtual cylindrical rotation surface, the virtual cylindrical rotation surface having a cylindrical axis that is coaxial with the shaft axis the virtual cylindrical rotation surface having a diameter that corresponds with a nominal diameter of the machining tool, and the cutting head further having at least one cutting-blade-free and chip-groove-free surface area,
• at least one fluid channel closed on a cutting head side, which extends through the shaft into the cutting head, and
• at least one branch channel emanating from the fluid channel with an outlet opening in the cutting-blade-free and chip-groove-free surface area,
• the outlet opening located in the cutting-blade-free and chip-groove-free surface area in a dynamic pressure active surface which is radially set back in relation to the virtual cylindrical rotation surface of the cutting head and which is larger than a flow cross-sectional area of the at least one branch channel at the outlet opening, a length of the dynamic pressure active surface in a direction parallel to the first direction is smaller than a length of the cutting edge in the first direction, the dynamic pressure active surface ending at a distance in the direction parallel to the first direction in front of a face end of the cutting head and in front of a shaft end of the cutting head.