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Archie Skinner, general manager at BIFTV told us: "This was a real challenge for our team. At 80 tonnes, the rotor was the same weight as a train carriage, which we had to rotate and then machine to plus 1.8 thousandths of an inch, minus nothing.

"Our engineers needed to build a custom fixture for our vertical gantry mill to allow us to work to such a high degree of accuracy on the rotor. We developed the unique tooling we required with our key supplier Seco and their recently acquired solid carbide end mill manufacturer, Jabro. The slots were rough milled using 80mm Seco helical mills and the accurate finish milling was achieved with 25mm diameter Seco/Jabro solid carbide end mills."

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