Sandvik Coromant Silent tools - application guide - Manual (Page 46)

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3. Turning
Insert point angle
Select an insert shape relative to the entering angle and
accessibility requirements of the tool. One rule of thumb is to
always choose the smallest possible nose radius to reduce
vibration tendencies. When it comes to point angle, there are two
paths to choose:
• A small insert point angle will improve tool stability, give good
clearance of a trailing surface, and small chip area variations if
the tool starts vibrating in a radial direction
• A large insert point angle gives insert strength and reliability but
requires more machining power, since a larger cutting edge is
engaged in the cut