Whirling is an attractive method for producing threads of high surface quality for e.g. medical bone screws. By means of this method, precise profiles can be milled. However, productivity is limited by the necessary preceding process of turning the outer contour. Synchronized whirling is a high-performance type of the method for simultaneous turning and whirling of the component. In addition, the new process opens up potential for optimization. Engineers of KIT study the performance of this new method in a research and development project in cooperation with the companies of Index, Paul Horn, and smith&nephew.