Metal removing tool, in particular lancing insert

A metal removing tool comprising:

• a tool body provided with a slot-shaped recess, said recess being formed with a wide mouth open at an edge of said body and defined between opposite sides of V-shaped cross section, and a narrow bottom extending inwardly from said mouth,
• said sides forming upper and lower flanks extending inwardly from said mouth and opposite one another, said lower flank being a bearing surface, said upper flank being formed with an outer face extending inwardly from said mouth and having a leading end, and an inner face lying inwardly and spaced apart from said outer face at a first obtuse angle to said first face and having a trailing end, said outer and inner faces of said body being bridged by a downwardly convex face;
• and
• a cutting insert detachably mounted in said recess and having opposite sides of a V-shaped cross section complementary to said cross section of said sides of said recess, said insert having a cutting edge projecting outwardly beyond said mouth, a lower surface extending parallel to and engaging said bearing surface of said body in an inserted position of said insert, and an upper surface which includes a first insert surface extending inwardly from said cutting edge extending at a first angle with respect to said outer face of said flank in the inserted position, said first insert surface being formed with a stop adjacent the cutting edge of said insert, said stop extending upwardly from said mouth in said inserted position of said insert and pressing against a frontal surface of the body, a second insert surface extending inwardly of said first surface and at a second obtuse angle thereto and forming a ridge therewith, said first insert surface forming a discrete first contact point between said leading end of said outer face of said body and said insert in said inserted position located between said ridge and said mouth so that said body is pressed against said insert at said first contact point, and a third insert surface extending inwardly from said second surface and at a third obtuse angle thereto and having at least one discrete second contact point with said trailing end of said inner face of said upper flank inclined at a positive angle with respect to said third insert surface in said inserted position, so that said insert is held under preliminary stress upon inserting.