A two high rolling mill consists of two rolls which rotate At the same speed but in opposite direction.
A two high rolling mill consists of two rolls which rotate At the same speed but in opposite direction.
A three high rolling mill consists of three rolls placed one above the other and the upper and bottom rolls rotate in the same direction whereas the middle roll rotates in opposite direction.
In a four high rolling mill, there are four rolls out of which Two are working rolls and two are backing up rolls.
In a four high rolling mill, the diameter of backing up rolls is Larger than the diameter of working rolls.
The parts of circular cross-section which are symmetrical about the axis of rotation are made by Hot spinning.