Countersink
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In manufacturing, a countersink is a conical hole cut into a manufactured object, or the cutter used to cut such a hole. A common use is to allow the head of a countersunk bolt, screw or rivet, when p
Side and end view of a Weldon style "zero flute" countersink
Side and end view of a 4-fluted countersink
Chamfer
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A chamfer is a transitional edge between two faces of an object. Sometimes defined as a form of bevel, it is often created at a 45° angle between two adjoining right-angled faces.
Countersink
…feed only) and also to other milling applications (sideways traversal). Therefore, countersinks overlap in form, function, and sometimes name with chamfering endmills (endmills with angled tips). Regardless of the name given to the cutter, the surface being generated may be a conical chamfer (plunging…
A chamfer with a "lark's tongue" finish
Chamfer on the facade of Saks Fifth Avenue in New York City
The Great gate (Darwaza-i rauza) gateway to the Taj Mahal, having chamfered tower corners
A chamfered building and street corner on Barcelona's Passeig de Gràcia. Here the building is chamfered but the sidewalk/street has taken on a conventional, 90-degree layout, eliminating the loading zone or parking spaces.