The Filament Winding process involves two primary components. A stationary steel mandrel rotates, while a carriage arm travels horizontally up and down the length of the mandrel. The traveling arm includes a winding eye, which groups the roving’s typically of carbon, fiberglass or a mixture of two and dispenses them to the mandrel. As the mandrel turns, the roving’s wrap around it to form a composite layer over the mandrel surface. The precise orientation of the composite matrix is determined by the rate of travel of the carriage and by the rotational speed of the mandrel, both of which are automated.