A little background…So basically I have a handful of aluminum sprockets I have to mill out. Each sprocket has 5 5/16 holes and they all need to be countersunk. I have done some math and have come up with a hole size of 5/16, a screw head diameter (and widest section of countersink) of .656 and a plunge depth of .328 on a 90deg countersink bit. I do not have a countersink bit wider than .500 nor can I find one reasonably priced for aluminum with a 1/4 shank.
Here is my question. (99 percent of the time I use Vcarve but am open to easel if I must) How do I or can I run a toolpath to sort of chamfer the countersink? Im not sure how to word it but I am imagaining a 90deg bit moving in a circular motion reducing z height with every rotation. Is this even possible?