Interrupted turning is common in aero-engine machining, said Sean Holt, aerospace specialist for Sandvik Coromant Co., Fair Lawn, N.J. There, a complete, finished component is machined out of a single, large block of material (most commonly Inconel 718) in several process stages that involve accurately removing a vast amount of material to meet strict parameters for the finished part's dimensions and characteristics. Sandvik Coromant claims to have cutting tools and machining methods that greatly improve aerospace component manufacturing.