Sorvaamalla

Sorvaamalla is the Finnish gerund form meaning “by turning,” and it designates the machining method of turning on a lathe. It derives from the verb sorvata, to turn a workpiece on a lathe, and is used in technical and craft contexts to describe material removal with a cutting tool while the workpiece rotates.

In turning, the workpiece is held in a chuck or between centers on a lathe. A cutting tool contacts the rotating workpiece and removes material as it advances along or across the workpiece. This produces cylindrical or conical shapes and can include operations such as facing (creating a flat surface at the end), turning to a precise diameter, threading, grooving, or parting. The process parameters—cutting speed, feed rate, and depth of cut—affect dimensional accuracy and surface finish.

Applications of sorvaamalla span metalworking and woodworking. In metal turning, it is common for manufacturing components such as shafts, pins, bushings, and fittings. In woodturning, it is used to shape bowls, legs, spindles, and decorative forms. Variants include rough turning for material removal and finish turning for final dimensions and surface quality. Complementary processes include drilling, milling, and grinding, which may be used in conjunction with turning to achieve complex geometries.

Tools and safety: Turning requires a lathe, chuck or centers, and appropriate cutting tools (turning, facing, threading tools). Operators must use personal protective equipment, guard the machine, and manage chips and coolant safely. Proper workholding, tool geometry, and cutting parameters are essential for accuracy and control.

See also: lathe, turning, woodworking, metalworking, machining.