Dampened CoroBore 825 Improves Security and Productivity

Sandvik Coromant’s CoroBore 825 dampened fine-boring tool system makes use of Silent Tools technology, with dampers dimensioned specifically to suit every adapter size in the assortment and deliver maximum performance for the user. This solution not only elevates process security where vibration issues are frequently encountered, such as when machining with long overhangs, but also improves productivity since cutting data can be increased substantially, the company says.

Among the principal updates is the change of boring head material from steel to aluminum. In addition, the head has been shortened, so the damper comes closer to the cutting edge, which is beneficial for process stability.

Internal channels are used to deliver coolant directly to the cutting edge, which is another factor that contributes to improved surface finish, higher penetration rates and better process security, the company says. The new generation of tools will provide optimum performance and stability with one standard adaptive item on the machine tool side, to bridge the tool into a steep taper, HSK or Coromant Capto spindle. 

The CoroTurn insert carriers for the new tools have entering angles at 92 to 95 degrees. This design increases stability because of reduced tool assembly deflection, making it possible to approach the bottom of a blind hole without engaging a bigger part of the cutting edge.

CoroBore 825 is especially useful for all fine-boring applications, covering diameters from 19 to 167 mm (0.748 to 6.575 inch), while a new assortment of cartridges can be used for back-boring applications. During back boring, the same internal coolant flow to the cutting edge is offered as in conventional boring.

For ease, the complete tool, comprising adapter and insert carrier, is delivered as a kit with a single product code.