I am working on developing a collection of involute gear cutters for my shop. I just acquired a pair of new 8DP cutters for a project and they both have what I would say is an unacceptable amount of runout. I don't expect them to track perfectly, but I feel that .018" and .027" variation measured from the bores to the tips of the teeth is a bit much. I can make these work with a pair of custom offset mandrels, as I want to finish the job this weekend. What is an acceptable standard for concentricity?