A series of metallographic and mechanical tests monitor the structural homogeneity and ensure that rolls are free from cracks, blow holes, gas holes, etc. hardness is measured using the 'shore', 'vickers' & 'dynamic' hardness testers.
The rolls meeting all the stringent tests to our complete satisfaction are then sent to the rest of the machine-shop, comprising high precision lathes, radial drill machines, boring machines, wobbler milling & grinding machines, etc.
Hollow rolls are dynamically balanced at different rpm to ensure their friction free movement. finally the rolls, as required, are tested by means of non-destructive testing methods like ultrasonic, magnetic particle inspection and dye-penetrant tests and the best possible quality of roll without surface and internal defects is ensured