Flank cooling for a milling tool

A tool body for a milling tool having a central rotation axis around which the tool body is rotatable, the tool body comprising:

• a front end;
• a rear end;
• an envelope surface extending between the front end and the rear end;
• a central recess extending from the rear end and configured to receive coolant from a spindle of a machine;
• at least one insert seat in which a cutting insert can be securely mounted formed in a transition between the front end and the envelope surface;
• and
• at least one coolant passageway for passage of coolant from the central recess to an exterior of the tool body, wherein the coolant passageway includes a first portion extending from the central recess in an outward direction towards the envelope surface, and a second portion extending from the first portion to an outlet in the exterior of the tool body, wherein the outlet is located in the insert seat and/or in the envelope surface behind the insert seat with respect to a rotation direction of the tool body, and wherein the second portion of the coolant passageway is directed towards the insert seat such that, when a cutting insert having a cutting edge and wherein a flank face is mounted in the insert seat such that the flank face faces outward with respect to the tool body, wherein coolant emerging from the outlet will pass along the flank face towards the cutting edge, and wherein the second portion of the coolant passageway is a channel having a length that is greater than a width thereof.