Cutting tool and insert holder for tangential cutting insert

摘要

A cutting tool has an insert holder for retaining a tangential cutting insert in an insert pocket. The insert pocket has a bottom surface, a rear surface and a base surface. The base surface has three abutment protuberances that extend from the base surface. Each base abutment protuberance has a respective base abutment surface. The three base abutment surfaces abut the cutting insert at three points to provide stable seating of the cutting insert in the insert pocket.