singleradius

Singleradius, also written single-radius, is a term used in several technical domains to denote a curve, edge, or feature defined by a single constant radius of curvature. In engineering and design, a singleradius profile uses one radius for the entire curved section, simplifying fabrication and analytical modeling. Because a circle is the locus of points at a fixed distance from a center, a true singleradius curve has constant curvature along its length, with a straight line representing the limiting case of infinite radius.

In orthodontics, a singleradius archwire is a fixed orthodontic wire whose curvature follows a single radius along the dental arch. This contrasts with wires designed with varying radii. The choice of archwire radius influences tooth movement and alignment, and clinicians consider it when planning treatment.

In alpine skiing, a single-radius ski has a constant sidecut radius along its length, producing a uniform turning characteristic. This design can be contrasted with multi-radius skis that combine different radii to modulate turn shape and stability.

Other uses include fillet and edge rounding processes in manufacturing, where specifying a singleradius means applying a uniform fillet radius between surfaces; and in product design, where ergonomic or aesthetic curves may adopt a single-radius profile. The concept is thus broadly about maintaining a single, uniform curvature across a defined feature.