Single Point Cutting Tool Parts

Face

The surface on which the chips slide

minor flank

Other name for end flank

major flank

Other name for side flank

Point

It is bounded by the face, side flank, end flank, and the base

Flank

The surface below and adjacent to the cutting edge

Shank

The main body of the tool. It is used to hold the tool

Heel

The intersection of the flank and the base of the tool. It is the curved portion at the bottom of the tool

Nose

It is the point where the side cutting edge and the end cutting edge intersects

Nose Radius

It will provide long life and also good surface finish with it a sharp point on the nose.

Cutting Edge

It the edge on the face of the tool which removes the material from the workpiece

Side cutting edge

end cutting edge

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What are the 2 cutting edges?

Side cutting edge angle

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

End cutting edge angle

This is the angle between the end cutting edge and a line normal to the tool shank

Lead angle

Other name for side cutting edge angle

Side relief angle

It is the angle between the portion of the side flank immediately below the side cutting edge and a a line perpendicular to the base of the tool and measured at the right angle to the end flank

End relief angle

It is the angle between the portion of the end flank immediately below the end cutting edge and a line perpendicular to the base of the tool and measured at the right angle to the flank

Side rack angle

It is the angle between the tool face and a line parallel to the base of the tool and measured in a plane perpendicular through the side cutting edge

Normal rake angle

The angle measured from the normal to the machined surface, in a plane normal to the cutting edge

Angle of inclination

Angle of tool axis with cross slide motion

Approach angle

Side cutting edge angle - 90 deg