Sandvik Coromant Silent tools - How to reduce vibration in metal cutting - Manual (Page 9)

Sandvik Coromant – How to reduce vibration in metal cutting 5
The boring bar families above include insert geometries that are designed
for specific applications, such as finish turning of steel materials, roughing
in stainless steel machining etc. This is needed to become more productive
at every application.
Solid steel bars
Recommended for overhangs up to 4 x bar diameter.
Carbide reinforced bars
Recommended for overhangs up to 6 x bar diameter.
Carbide reinforced and damped bars
Recommended for overhangs up to 10 x bar diameter.