A bevelled edge (UK) or beveled edge (US) is an edge of a structure that is not perpendicular to the faces of the piece. The words bevel and chamfer overlap in usage; in general usage they are often interchanged, while in technical usage they may sometimes be differentiated as shown in the image at right. A bevel is typically used to soften the edge of a piece for the sake of safety, wear resistance, or aesthetics; or to facilitate mating with another piece.
Most cutting tools have a bevelled edge which is apparent when one examines the grind.
Bevel angles can be duplicated using a sliding T bevel.
Glass and mirrors
Bevelled edges are a common aesthetic nicety added to window panes and mirrors.
In Disc Golf, the 'beveled edge' was patented in 1983 by Dave Dunipace who founded Innova Champion Discs. This element transformed the Frisbee into the farther flying golf discs the sport uses today.
With a deck of cards, the top portion can be slid back so that the back of the deck is at an angle, a technique used in card tricks.
In the semiconductor industry, wafers have two typical edge types: a slanted beveled shape or a rounded bullet shape. The edges on the beveled types are called the bevel region, and they are typically ground at a 22 degree angle.
Beveling and chamfering (along with other profiles) are applied to thicker pieces of metal prior to welding, see Welding_joint#V-joints. The bevel provides a smooth clean edge to the plate or pipe and allows a weld of the correct shape (to prevent center-line cracking) to join the separate pieces of metal.
Simple bevels can be used with a backup strip (thin removable sheet behind the plate joint) with chamfers (and a small land) being used on open root welds. Particularly thick plate will have a "J" shaped chamfer or "U" shaped groove to reduce the amount of welding filler metal used.
Cruciform joint preparation can involve a double bevel to permit full penetration of each weld to the other, removing a possible void space in the center.
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