Rotatable multi-operation tool for chip removing machining, and a basic body therefor

A rotatable multi-operation tool for chip removing machining, comprising:

• a plurality of replaceable cutting inserts of different types;
• and
• a basic body that is rotatable around a center axis and includes a rear end and a front end from which there is extending rearward an envelope surface in which at least one chip space, delimited by two opposite side surfaces, is countersunk, which opens in the envelope surface and in the front end,
• a first cutting insert being mounted in a first insert seat that is formed in one side surface of the chip space and situated in the immediate vicinity of the front end and included in a cavity that opens in the front end for the cutting insert to partly protrude axially forward from the front end, the cavity that opens in the front end being spaced-apart from the envelope surface,
• a second cutting insert, of a type other than the first cutting insert, being mounted in a second insert seat, which is formed in the same side surface as the first insert seat and situated axially behind the first insert seat, the second insert seat being included in a cavity that opens in a part of the envelope surface, wherein
• the envelope surface is at least partially cylindrical such that its largest radius defines a radius of an imaginary circle, and the cavity including the second insert seat is axially adjacent to a relief surface that is radially situated inside the imaginary circle, the relief surface being a part of the envelope surface.