Chamfer

Example of a chamfer

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A chamfer is a beveled edge connecting two surfaces. If the surfaces are at right angles, the chamfer will typically be symmetrical at 45 degrees. Chamfers may be both exterior (cutting off an external angle) and interior (filling in an internal angle). A fillet is the opposite, rounding off an interior corner.

"Chamfer" is a term commonly used in industrial engineering. Special tools such as chamfer mills and chamfer planes are available.

An example of chamfering is part of the process of hand-crafting a glass mirror. Before the surface of the disc can be ground, the edges must first be chamfered to prevent chipping. This can be accomplished by placing the disc in a metal bowl containing carborundum and rotating the disc with a rocking motion. The grit will thus wear off the sharp edge of the glass.

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