What is the definition of "facet clearance"?
The angle created behind the facet, trailing the cutting direction. The smaller the clearance angle, the closer the insert and its facet are to the workpiece.

Learn more about facet clearance in the class ANSI Insert Selection 250 below.


Metal Cutting Training


Class Information
Tooling U classes are offered at the beginner, intermediate, and advanced levels. The typical class consists of 12 to 25 lessons and will take approximately one hour to complete.
Class Name:ANSI Insert Selection 250
Description:This class walks through the ANSI B212.4-1995 standard for insert identification.
Prerequisites: 200220  800130 
Difficulty:Intermediate
Number of Lessons:20
Language:English, Spanish, Chinese

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Below are all the competencies and job programs that contain the class ANSI Insert Selection 250. Job programs are our traditional class lists organized according to common job functions. Competencies are our latest job-specific curricula that help tie online learning to practical, hands-on tasks.

Click on any title to view its details.

Competencies


Class Outline
  • Objectives
  • Insert Classification Systems
  • ANSI Classification
  • 1: Insert Shape
  • Round and Square Inserts
  • Triangle and Diamond Inserts
  • Other Insert Shapes
  • 2: Clearance Angles
  • 3: Insert Tolerance
  • 4: Insert Type
  • Chipbreakers
  • 5: Insert Size
  • 6: Insert Thickness
  • Recommended Insert Sizes
  • 7: Corner Radius and Facet Angle
  • 8: Cutting Edges
  • 9: Cutting Direction and 10: Facet Size
  • ANSI vs. ISO
  • Insert Shape and Carbide Grade
  • Summary
  
Class Objectives
  • Explain how ANSI describes inserts.
  • Describe the information given in the ANSI insert classification system.
  • Describe the significance of insert shape during machining.
  • Describe the characteristics of round and square inserts.
  • Describe the characteristics of triangle- and diamond-shaped inserts.
  • Describe the characteristics of other common insert shapes.
  • Define clearance angle.
  • Describe a precision insert.
  • Describe the features included in insert type.
  • Describe the use of chipbreakers.
  • Describe how to determine insert size.
  • Describe insert thickness.
  • Describe how to determine insert size.
  • Describe the significance of corner radius and facet angle.
  • Describe the significance of cutting edges.
  • Describe cutting direction and facet size.
  • Describe the difference between ANSI and ISO insert classification systems.
  • Describe the significance of carbide grade.

Class Vocabulary

Vocabulary TermDefinition
ANSI American National Standards Institute. A private, non-profit organization that administers and coordinates voluntary standards and systems.
CBN Cubic boron nitride. CBN is a type of cutting tool material offering a hardness that is second only to diamond. CBN tools are very effective at machining most steels and cast irons, but they are also very expensive.
clearance angle An angle formed by the end flank of the insert and the workpiece surface.
corner radius The rounded tip on the cutting edge of an insert. The greater the corner radius, the greater the degree of roundness at the tip. A zero degree corner radius creates a sharp point.
countersunk Machined with an interior beveled surface in order to leave room for the head of a screw.
end cutting edge angle If viewed from above looking down on the cutting tool, it is the angle formed by the end flank of the tool and a line parallel to the workpiece centerline. Increasing the end cutting edge angle tilts the far end of the cutting edge away from the workpiece.
facet A small, flat surface next to the cutting point on the minor cutting edge. The facet increases the amount of insert in contact with the workpiece behind the cutting action occurring on the major cutting edge.
facet angle The angle created between the major cutting edge and the workpiece in the direction of feed on an insert with a facet.
facet clearance The angle created behind the facet, trailing the cutting direction. The smaller the clearance angle, the closer the insert and its facet are to the workpiece.
grade A type or category of cutting tool material specified for a particular use.
ground Machined with an abrasive to achieve a very accurate dimension.
hand The direction in which an insert or tool is capable of effectively cutting. Cutting tools are left-handed, right-handed, or neutral.
inscribed circle A circle that fits exactly within the boundaries of another shape.
insert angle An angle formed by the two sides of the insert that merge at the cutting point. Larger insert angles are stronger than smaller angles.
ISO The International Organization for Standardization. ISO establishes documented standards, rules, and guidelines to ensure that products, processes, and services are fit for their purpose.
mechanical chipbreaker A small wafer clamped onto the toolholder with the insert to prevent chips from forming into long pieces.
negative rake If viewed from the side facing the end of the workpiece, it is the angle formed by the face of the tool and a line parallel to the floor. A negative rake angle tilts the tool face above parallel.
nomenclature A specific naming or numbering system used to categorize items in a logical fashion.
PCD Polycrystalline diamond. PCD is the manufactured formation of diamond that has a hardness approaching natural diamond.
positive rake If viewed from the side facing the end of the workpiece, it is the angle formed by the face of the tool and a line parallel to the floor. A positive rake angle tilts the tool face below parallel.
precision insert An insert designed for operations requiring highly accurate dimensions. All the key dimensions of precision inserts are accurately ground.
profiling The machining of contoured or curved forms into a workpiece. Profiling typically refers to vertical milling operations.
shoulder An angled surface similar to a chamfer, created by milling or turning.
side cutting edge angle If viewed from above looking down on the cutting tool, it is the angle formed by the side flank of the tool and a line perpendicular to the workpiece centerline. A positive side cutting edge angle moves the side flank into the cut, and a negative angle moves the side flank out of the cut.
sintered chipbreaker A grooved or indented feature of an insert designed to prevent chips from forming into long pieces.
utility insert An insert primarily designed for roughing operations. Most utility inserts are ground only on the top and bottom faces.
wiper flat The flat surface trailing the cutting point. A wiper flat provides an extended cutting edge for milling inserts.