ROLLING MILL, a combination of
machinery used in the manufacture of
malleable iron and other metals of the
same nature. By it the iron which is
heated and balled in the puddling
furnace is made into bars or sheets. It
consists of rollers, journaled in pairs in
metallic boxes in the iron standards or
cheeks, and capable of being set toward
or from each other by means of
set-screws. The grooves in the rolls are so
made as to be co-active in giving the
required form to the heated iron passing
between them. The face of each
roller has a series of grooves gradually
decreasing in size toward one end. The
iron is passed through each in succession, being thus gradually reduced in size and increased in length. By this operation two objects are effected: (1) The scoriæ and other impurities are expelled, and (2) the required form whether of plate, bolt, or bar, is given to the metal.