Definition of basic terms
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A. Cutting edge
B. cutting edge length
This is the section or part of the insert that actually cuts the workpiece. The length of this edge is the cutting edge length.
A. Rake face
This is the face of the insert that is in contact with the workpiece when machining, it is on this face that the chips will rub or slide across away from the workpiece when machining is carried.
A. Flank face (relief face, clearance)
This is the face or side of the insert that is given clearance or relief so as to prevent contact with the workpiece while machining.
A. Rake angle
This is the angle between a perpendicular plane to the machined surface and the rake face of the insert at the point of contact.
A. Flank angle (relief angle)
This is the angle between the machined surface and the flank face of the insert. The clearance angle prevents contact between the workpiece and the flank face of the insert.
A. Corner radius
The corner radius is a term used to represent the radius of the insert nose or corner.
A. Chip breaker
The chip breaker is a combination of grooves and dots on the rake face of the insert. The function of a chip breaker is to break up the chips developed when machining, and to control the direction in which the chips flow.
This is an edge preparation carried out to maintain and improve the cutting edge strength.
A. Inscribed circle
Represents the circle within the insert that cuts a tangent with all of the cutting edges.