Hole drilling with close proximity backwall

摘要

A method of making a coated component with a close proximity backwall is achieved by applying a coating (68) to a pre-existing workpiece (10) that contains a substrate (62) with a plurality of apertures (60A,60B). The substrate (62) is in close proximity to a backwall (64). The coating (68) is removed from the plurality of apertures (60A,60B) with a fluid jet cutting system. The fluid jet (J) cutting system has a fluid jet that does not include a particulate material additive.