I did not have that much contact on the hook but I did have a good amount in the center of the hook. Are not most hinge pins tapered? How do you account for that when milling as end mills are not tapered? I agree that using a vertical end mill would be the best choice and I do have some experience machining. I have access to a vertical mill and even a cnc mill but since it is at my school bringing in a set of barrels is out of the question. I may be able to get the permission, but I doubt it.
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