Sandvik Coromant Silent tools - How to reduce vibration in metal cutting - Manual (Page 14)

Sandvik Coromant – How to reduce vibration in metal cutting 10
Tool overhangs:
Depending on the depth of the hole that needs to be turned, it is important
to choose the correct type of tool holder and tool holder material.
Boring bar materials:
As seen on the diagram the following boring bar materials can be selected to suit
the length to diameter ratio overhangs.
Steel boring bars: Up to 4 x D
Carbide boring bars: Up to 6 x D
Steel damped boring bars short design: Up to 7 x D Silent Tools
Steel damped boring bars long design: Up to 10 x D Silent Tools
Carbide reinforced damped boring bars: Up to 14 x D Silent Tools
All damped boring bars are called Silent Tools and consist of different
variations of tools, the most common being CoroTurn SL (570) system.
Tuned damped bars
/
4
= damped part.
Do not clamp on this area. This is indicated
on the boring bar.
Max recommended overhang for damped
bars, short design 7 x D and long design
10 x D.
Solid bars
Smallest possible overhang.
Max recommended overhang for steel bars
4 x D (/)
Max recommended overhang for Carbide
bars 6 x D (/)