Edger
in a rolling mill, a roll stand having vertical rolls, designed to compress the metal being rolled along its side surfaces. The design and location of an edger depend on the type of rolling mill. In sheet and slabbing mills, edgers are used to produce smooth, even edges on the sheets and slabs; they have driven rolls and are situated either ahead or behind the main stand with horizontal rolls. The edgers of billet and section mills are designed to eliminate canting and distortion of the metal during rolling; they usually have driven rolls and are situated in alternation between stands having horizontal rolls. The edger rolls of rail and beam mills are situated in the same plane as the horizontal rolls and are designed without drives. Roll stands with both horizontal and vertical rolls are known as universal stands.
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