A pit type coil car receives coils from the rack over a pit. The coil car places the coil onto the single-end hydraulic expanding mandrel uncoiler. The uncoiler is equipped with an electric motor regenerative brake or a water cooled brake system.
Gold and silver are rolled on a rolling mill. All coins made from copper zinc coils are made on a rolling mill. In fact, almost any metal can be rolled on a rolling mill. This includes lithium for batteries and uranium for atomic energy.
There are many stainless alloys. The most common is 300 series. The most important purpose is to have a metal that will not rust or corrode. Many stainless steels can be surface polished or brushed to make a product that will last indefinitely around mixtures of water.
Practically all new rolling mills today are equipped with hydraulic screwdowns for hot or cold rolling. A disadvantage of mechanical screwdowns is the fact that you cannot adjust accurately while the screwdowns are under pressure.
