Cutting Tool Nomenclature - SKengineers

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CUTTING TOOL NOMENCLATURE


1.      SHANK –

              Main body of the tool.

2.      SIZE –

         Width, height and overall length of shank.

3.      FLANK –

             The surface below and adjacent to the cutting edge.

4.      HEEL –

           The intersection of flank and base of tool.

5.      FACE –

           The surface on which the chip strikes.


6.      CUTTING EDGE –

                             The portion of face that separates the chip from the workpiece. The cutting edge consist of side cutting edge, nose, and end cutting edge.

7.      NOSE –

            The intersection of side cutting edge and end cutting edge.

8.      SIDE CUTTING EDGE ANGLE –

                           The angle between the side cutting edge and side of tool shank.

9.      END CUTTING EDGE ANGLE –

                           The angle between end cutting edge and a line perpendicular to the shank.

10.   SIDE RELIEF ANGLE –

                            The angle between the portion side flank below the side cutting edge and a line perpendicular to the base of the tool. It is the angle that prevents interference as the tool enters the work.

11.   END RELEIF ANGLE –

                            The angle between the portion end flank below the end cutting edge and a line perpendicular to the base of the tool. It is the angle that allows the tool to cut without rubbing on the workpiece.

12.   SIDE CLEARANCE ANGLE –

                            The angle below the side relief angle.

13.   END CLEARANCE ANGLE –

                            The angle below the end relief angle.

14.   BACK RAKE ANGLE –

                             The angle between the face of the tool and the line parallel with the base of the tool, measured in a perpendicular plane though the side cutting edge.

15.   SIDE RAKE ANGLE –

                             The angle between the face of the tool and the line parallel with the base of the tool, measured in a plane perpendicular to the base of the tool.

The rake angle allows the chips to flow in a convenient direction, reduce the cutting force and improve surface finish.

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