The NB 251 is capable of performing all relevant production steps: from the efficient roughing of components from a single piece of material to the adaptive machining of friction-welded blisks, right the way through to the highly dynamic smoothing of flow surfaces in point contact.

Now, discussions are centring around the Starrag NB series, which has been developed and optimised with the process as a whole in mind – that is, the highly efficient, simultaneous five-axis machining of blisks/IBR.

A prime example of a machine in this series is the NB 251 with an inclined B axis, on which the tool is practically rotated around the tool centre point. The compact design of this machine is characterised by its extremely high degree of machining accuracy, high cutting performance and high level of dynamism with a low number of moving masses. Compared with a standard machine with swivel rotary table, the strengths of the NB 251 are obvious. When the rocker swivels, the machines with swivel rotary table needs extra time for the very long compensating movements. These compensating movements are necessary to ensure the tool remains on the same machining point.