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Choosing Insert Geometry Insert Radius
Choosing the insert radius for a particular application is a combination of many factors. The corner radius of the groove turn insert influences the product shape and tool life.
● A larger radius - in turning operations - normally improves
surface quality.
● An insert with a larger radius has a better distribution of the cutting
load and of the generated heat. It is stronger and ensures longer
tool life.
● Small radii on CUT-GRIP inserts result in increased side forces and
side deflection, preventing instability, especially with small depth of
cut and feed.
● The best radius to use is basically determined by the geometry and
dimensions of the workpiece. The more securely the workpiece is
fastened in the machine tool, the larger the radius may be.
● When the ratio of a workpiece's length compared to its diameter is
large, inserts with smaller radii will prevent chatter.
● The radius should be larger than the maximum feed.
● In profiling operations, inserts with large corner radii or full radii
are required.
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