Shearforming is used to form conical, radial, parabolic or ogivial geometries. The preforms are typically in the shape of circular discs. With the preform held firmly against the nose of the mandrel by hydraulic force from the tailstock or by other mechanical means, the carriage is made to move right to left. The rollers plastically deform ("shear") and flow the available metal against the mandrel. Shearforming can be described as a combination of metal spinning and forward flowforming.