Cutting insert

A cutting insert for chip removal machining, including longitudinal turning, comprising upper and lower surfaces interconnected by side surface means to form at least one corner, an intersection of said side surface means and said upper surface forming an edge region including first and second edge portions, said first edge portion including a main cutting edge at least a portion of which is curved and extends around said corner, said first edge portion including a clearance portion extending from a terminal end of said main cutting edge lying on said curved portion generally toward a center axis of the insert, said second edge portion having an end situated adjacent said clearance portion and extending away from said clearance portion in a direction generally away from said center axis, said second edge portion intersecting a tangent line which is tangent to said terminal end of said main cutting edge and extending past such tangent line in a direction generally away from said center axis to define a secondary cutting edge located on a side of said tangent line which is opposite that of said main cutting edge, said secondary cutting edge extending to a terminal end thereof which is spaced from said terminal end of said main cutting edge by a distance of from 0.1 to 4.0 mm along a line interconnecting said terminal ends, whereby said main and secondary cutting edges are adapted to cut during chip removal machining, including longitudinal turning.