Tool for chip removing machining as well as a basic body and an indexable cutting insert therefor

A tool for chip removing machining, comprising:

• a basic body having a connecting surface included in an insert seat;
• and
• an indexable cutting insert mounted in the basic body and having a connecting surface in mechanical engagement with the connecting surface of the basic body, and fixed by a tightening element,
• wherein the connecting surface of the basic body includes a solitary, polygonal elevation that protrudes from a bottom surrounding the elevation from all sides, the elevation including two external side support surfaces orientated at an angle to each other,
• wherein the connecting surface of the cutting insert includes a solitary depression that is wider and deeper than the elevation, the depression being surrounded by a frame including at least three banks running at an angle to each other, the at least three banks including internal shoulder surfaces, two of which are pressed against the two side support surfaces of the elevation, and the at least three banks including lower base surfaces situated in a common plane, three of which rest against the bottom surrounding the elevation, and
• wherein one or more guide surfaces are formed in the basic body and inclined relative to the elevation and spaced apart from the cutting insert, the guide surfaces guide the depression in the underside of the cutting insert toward the elevation in connection with mounting the cutting insert.

A tool for chip removing machining, comprising:

• a basic body having a connecting surface included in an insert seat;
• and
• an indexable cutting insert mounted in the basic body and having a connecting surface in mechanical engagement with the connecting surface of the basic body, and fixed by a tightening element,
• wherein the connecting surface of the basic body includes a solitary, polygonal elevation that protrudes from a bottom surrounding the elevation from all sides, the elevation including two external side support surfaces orientated at an angle to each other,
• wherein the connecting surface of the cutting insert includes a solitary depression that is wider and deeper than the elevation, the depression being surrounded by a frame including at least three banks running at an angle to each other, the at least three banks including internal shoulder surfaces, two of which are pressed against the two side support surfaces of the elevation, and the at least three banks including lower base surfaces situated in a common plane, three of which rest against the bottom surrounding the elevation, and
• wherein the tool is in the form of a milling cutter, the basic body of which is rotatable around a center axis and includes a chip pocket, which opens in an envelope surface as well as an end surface of the basic body, the insert seat having the connecting surface being formed in the chip pocket, wherein the elevation includes a corner between the two side support surfaces, the corner located in the vicinity of a corner between the envelope surface and the end surface of the basic body.