Slot milling disc, a slot milling tool comprising a slot milling disc and a disc for a milling disc

A slot milling disc comprising:

• an outer peripheral surface provided with a plurality of cutting edges, wherein the slot milling disc is made in one piece, the cutting edges being provided by separate cutting inserts mounted in insert seats arranged at the outer peripheral surface;
• an attachment arrangement configured to prevent rotary movement between the slot milling disc and a rotatable mounting shaft;
• and
• at least one flushing fluid channel having a confined cross-section and extending within the milling disc from an inlet opening located in a central part of the disc and configured to be connected to a source of flushing fluid and to at least one outlet opening in the outer peripheral surface of the disc, wherein the at least one flushing fluid channel includes an inner channel portion extending from the inlet opening towards the outer peripheral surface and ending before reaching the outer peripheral surface, and a first outer channel portion extending from the inner channel portion in a direction opposite to a direction of intended rotation of the disc, while changing direction of the flushing fluid channel in such a manner as to be inclined towards a rake surface of a respective cutting edge and extending to the at least one outlet opening, and a second outer channel portion extending from the inner channel portion in the direction of the intended rotation direction towards and inclined to a clearance side of another cutting edge.