Tool for machining a workpiece

Method for producing a tool for machining a workpiece, said method having the method steps:

• providing a first tool component which comprises a first internal coolant bore which is realized as a coiled bore, and, on a first face side end, a first connection interface, wherein the first connection interface comprises a first end face for attaching a joining material as well as an elongated feather key which protrudes from the first end face, runs along a straight line, extends at least over a major part of the width of the first tool component in the radial direction and divides the first end face into two equally-sized first part-end faces, wherein a first coolant outlet of the first internal coolant bore is arranged on the elongated feather key;
• providing a second tool component which comprises a second internal coolant bore which is realized as a curved, non-linear bore, and, on a second face side end, a second connection interface, wherein the second connection interface comprises a second end face for attaching the joining material as well as an elongated groove provided in the second end face, runs along a straight line, extends at least over a major part of the width of the second tool component in the radial direction and divides the second end face into two equally-sized second part-end faces, wherein a second coolant outlet of the second internal coolant bore is arranged in the elongated groove;
• providing a joining material to the first and/or second end face;
• aligning the first tool component relative to the second tool component, in such a manner that the first coolant outlet aligns with the second coolant outlet;
• connecting the first connection interface of the first tool component to the second connection interface of the second tool component by means of the joining material.