A calandra de rolos é uma dobradeira leve projetada para processar chapas finas e tubos circulares de pequeno diâmetro, com função de pré dobra e bordas retas menores.

Two rollers rolling machine is a high-precision rounding device mainly used to roll various metal sheets into circular or conical shapes. It is widely used in industries such as ventilation ducts, chimneys, solar water heaters, kitchen and bathroom appliances, fans, fire-fighting equipment, and automobiles.