1) OD undersized by 0.030mm because the insert position change during the running of part.|2) The crack generated on the insert camp during the tightening of insert resulted in insufficient clamping force and pushed the insert from its position and the operator did not notice the Development of crack in the clamp.|3) The insert clamp used was old and the tightening force was applied manually and because of which the insert clamp cracked from the bottom and resulted in poor holding of insert. 