Silent Tools™ for turning
Overcome vibrations in internal turning
Recommendations
Overhang
To avoid vibration, use Silent Tools™ for overhangs over 3 × D.
Clamping
Ensure a minimum clamping length of 4 x D.
Sleeves
Use split sleeve mounting for maximum clamping contact. Sleeves used in split boring bar holders for downsizing facilitate the correct clamping length to minimize vibration.
Application tips
Maximum recommended overhang
- The selection of boring bar material has a huge impact on achieving the best production economy
- Overhangs up to 10 × DMM are usually solved by applying a steel damped boring bar to accomplish a sufficient process
- Overhangs over 10 × DMM require a carbide reinforced damped boring bar to reduce radial deflection and vibration
- Internal turning is very sensitive to vibrations. Minimize the tool overhang, and select the largest possible tool size in order to obtain the best possible stability and accuracy
- For internal turning with steel damped boring bars, the First Choice is 570-3C type bars
- For grooving and threading where the radial forces are higher than in turning, the recommended bar type is 570-4C
Maximum recommended overhang for different bar types
| Bar type | Turning | Grooving | Threading |
| Steel boring bars | 4 x DMM | 3 x DMM | 3 x DMM |
| Carbide boring bars | 6 x DMM | 5 x DMM | 5 x DMM |
| Steel damped boring bars | 10 x DMM | 5 x DMM* | 5 x DMM* |
| Carbide reinforced damped boring bars | 14 x DMM | 7 x DMM | 7 x DMM |
* 570-4C bars
Boring bar diameter
| inch | mm | |||
|
Overhang L/D |
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| Steel damped boring bars | Carbide reinforced damped boring bars | |||
Is your set-up coolant compatible?
The new generation of CoroTurn® SL cutting heads (SL16 and SL20) seamlessly integrate with the through coolant functionality of the new generation Silent Tools™ turning adapters, delivering side-oriented internal through coolant to the insert edge.
To utilize the benefits of both products, your set-up needs to be coolant compatible. See the matrix below to find out which cutting heads can be paired with the adapters.
| | New generation CoroTurn® SL cutting head, SL16 & SL20 | Old generation CoroTurn® SL cutting head, SL16 & SL20 | CoroTurn® SL cutting head with HPC, SL25 | CoroTurn® SL cutting head, SL25 |
| New generation Silent Tools™ turning adapter, 16 & 20 mm (⅝ & ¾ inch) | Yes | No | N/A | N/A |
| Old generation Silent Tools™ turning adapter, 16 & 20 mm (⅝ & ¾ inch) | Yes | Yes | N/A | N/A |
| New generation Silent Tools™ turning adapter (through coolant), 25 mm (1 inch) | N/A | N/A | Yes | No |
| Old generation Silent Tools™ turning adapter (side coolant), 25 mm (1 inch) | N/A | N/A | No | Yes |
Old generation Silent Tools™ turning adapter (through coolant), 25 mm (1 inch) | N/A | N/A | Yes | No |
From diameter 32 mm (1 ¼ inch), all old cutting heads can be used.
Tool Status Checker
Streamlined set-up and tool health monitoring for the turning adaptors
Improve set-up accuracy and ensure optimal tool health with the Tool Status Checker digital device, designed for seamless monitoring of Silent Tools™ turning adaptors on a Windows tablet or computer.
With Tool Status checker, you can:
- Ensure an accurate center height setting
- Monitor the adaptor's working temperature
- Ensure that the adaptor is operational before machining, using a tap test
Learn more about Tool Status Checker here.
Download and install
Download and install the software on a device running Microsoft Windows 10/11 or newer.
Download and install the file and follow the instructions in the installer.
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Sandvik Coromant US - Mebane, NC
+1-800-Sandvik