Beveling is a shallow removal of material, typically on the edge of a piece or rim of a pipe, to remove a sharp edge and/or prepare the piece for welding or further manipulation. Chamfering is, in essence, a shallow bevel that does not remove material to the full thickness of the piece.
Beveling machines can be hand-held, table-top, or free-standing tools. Some are specifically made to bevel the edge flat material like plates, while some can be used to bevel unique shapes like rectangular tube and pipes. Belveling machines rotate a bit at high speeds to shave off a desired portion of material. Bit shape determines the amount of material that is removed from the edge.