The cutting tool shown generally as (1), has a disc with a peripheral cutting face. In this embodiment the cutting face includes an array of eight circumferentially spaced teeth (2). An open circumferential gutter (5) is located inboard of the teeth and is recessed into a lateral face of the disc. Fluid in the gutter drains into the passageways through the respective inlets under the apparent force due to rotation. A fluid passageway (9) runs between the gutter and the base of the each tooth. The fluid is thereby forced through the passageway and out of outlet (11).