Method for manufacturing a cutting tool with lubrication orifices of complex shapes and cutting tool with lubrication orifices of complex shapes

A method for manufacturing a cutting tool with lubrication orifices, comprising the following steps:

• producing a polymer insert made of plasticised polyvinyl butyral, plasticised cellulose acetate butyrate, or polybutyl methacrylate acrylic resin,
• overmoulding a body of the cutting tool with the polymer insert by injecting into a mould,
• forming cutting tool lubrication orifices in the body of the cutting tool by removing the polymer insert, the shape of the body and the cutting tool lubrication orifices are complementary with that of a part of the insert, the cutting tool lubrication orifices comprising a central hollow, discharge openings, radial channels extended from intake openings inside of the body at the central hollow and to first ones of the discharge openings at an outside of the body, and peripheral grooves extended along the outside of the body and to a free end of the body, the free end of the body being a longitudinal end of the body, and a second one of the discharge openings is open, at a center of a concave portion of the free end, from the central hollow to the outside of the body,
• sintering the body of the cutting tool,
• machining the body of the cutting tool on an active part of the body, and
• depositing an abrasive coating on a surface of the active part of the body of the cutting tool.