S-shaped mixed ceramic cutting insert i.e. indexable cutting insert, for hard machining of e.g. driven shaft, has chip guiding surface formed steeper than chipping surface relative to plane in direction away from edge

摘要

The plate (1) has a section bearing (10) resting perpendicular to a tool reference plane (8) of the plate. A cutting edge (6) is limited against the tool reference plane by a chipping surface (14) at a chipping angle (gamma) that is lesser than or equal to 0 degree. A chip guiding surface (18) adjoining the chipping surface is formed steeper than the chipping surface relative to the tool reference plane in a direction away from the cutting edge. The chip guiding surface is formed against the tool reference plane at a chip guiding angle (delta) of about 0-90 degree.