Sandvik Coromant Silent tools - application guide - Manual (Page 43)

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3. Turning
Factors that influence vibration
To minimize vibration tendencies:
• Use a large entering angle and positive rake angle
• Use big nose radii and point angle
• Use a positive macro geometry
• Control the wear pattern and ER-treatment on the micro geometry
• Depth of cut should be larger than the nose radius.
Lower radial force gives less radial deflection and fewer problems
with vibration. For best results; use a radial depth of cut that is
larger than the nose radius when using a 90° entering angle
(0° lead angle). If the radial depth of cut is smaller, a 45° entering
angle will give you equal results.
Vibration tendency
Entering/lead angle and rake angle
Nose radius and point angle, mm (inch)
Macro geometry
Micro geometry
Depth of cut related to nose radius