Milling tool, cutting method, and method of manufacturing milling tool

A cutting method comprising:

• rotating a milling tool, the milling tool including
• a tool body having an outer circumferential portion,
• an insert attached to the tool body, and
• a cover surrounding the outer circumferential portion, with a gap lying between the outer circumferential portion and the cover;
• and jetting a water-soluble coolant from the outer circumferential portion of the tool body into the gap between the outer circumferential portion and the cover;
• and
• jetting the water-soluble coolant into the gap when rotating the milling tool to cut a workpiece.

A method of manufacturing a milling tool, the method comprising:

• preparing a tool body including
• an outer circumferential portion having an upper end and a lower end, and
• an end portion located at the lower end of the outer circumferential portion;
• drilling an outer circumferential surface of the tool body to form a jetting port in the outer circumferential surface of the tool body, the jetting port being configured to allow a coolant to jet;
• attaching an insert including a cutting edge to the tool body so that the cutting edge protrudes from the end portion;
• and
• attaching a cover to the tool body so as to cover the jetting port, the cover surrounding the outer circumferential portion, with a gap lying between the outer circumferential portion and the cover.