Caliber rolling is one type of rolling process. A pair of rolls with grooves are used in caliber rolling. Two rolls rotate in the opposite direction to each other. As the sample goes through between the upper and lower rolls at the grooves, it decreases in breadth and increases in length. V-shape grooves are used for square samples, and round grooves for round samples.
Schematic drawing of the caliber rolling with square grooves.
Front view of a set of grooved rolls.