Chamfer and fillet are both commonly used design features with sharp edges. Designers are always confused by these edge features. Although they sound similar, they have different features and uses. This article will discuss the differences between chamfers and fillets and offer some advice on whether to choose between them.

What is Chamfer? Chamfer is a slop formed by cutting a sharp edge at a certain angle. A common procedure is cutting a right-angle edge into a 45° surface. Charmfering is commonly used to remove burrs caused by machining or to facilitate the connection and assembly of the parts. It is widely used in furniture, printing circuit boards, and more.

Chamfer Chamfer edges have different angled slopes; common chamfer angles are 45 degrees and 65 degrees.

What is Fillet? Fillet is the arc that creates a smooth transition between the sharp edges of two mating surfaces. Fillet has a radii; it can be either internal or external to the part. Fillets are added to reduce the stress concentration of the edge and extend the lifespan of the part.

Fillets Fillets can be divided into three types by their location: mitre fillet, concave fillet, and convex fillet.

Mitre fillet: Bevel the edges so that the two faces meet at an angle. Concave fillet: Concave the corner of a shape to form an inward arc. Convex fillet: Convex the corner of a shape to form an outward arc. Learn more: https://www.sogaworks.com/blogs/chamfer-vs-fillet/