Originally Posted by
Dave Rosner
Interesting...why an end mill vs a standard router but?
Some "end mills" are "standard router bits"...it's just a term most often associated with spiral cutters with one or more flutes and comes from the metal working world. The advantage of an end-mill of the correct configuration (or insert cutter) for surfacing material is that they are designed to remove the chips and cut with a shearing action which leaves a clean surface. A strait router cutter can do this pretty clean, too, but it may not be as effective.
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The most expensive tool is the one you buy "cheaply" and often...