With something that meets the blade length, we are very saved because we can drill with high accuracy as it is. In the case of long holes, machining up to the blade length, then processing with long drills is not bent and is saved.
Used to drill the alloy C276. Peripheral speed is 5 m / min, feed is around 30 mm / min. If nonstep, it was possible to use up to 2D deep. Coolant used an emulsion.