It is important to determine the phisycal dimensions of the aluminium coil(or sheet) needed for a particular application, since this helps to reduce material wastage.
Inner diameter: describes the width of the hole formed by the aluminium coil when rolled or wound on a core. This dimension usually depends on the type (and size) of the re-coiler used for the sheet metal recoil process.
Outer diameter: Describes the diameter formed by the outer circular outline of the coil. This dimension usually depends on the capacity and the geometrical characteristics of the re-coiler machine used to process the aluminium coil.
Thickness: The perpendicular distance between the two parallel surfaces of the aluminium coil
Coil width: The transversal dimension of the aluminium coil.
