Nikhil Roll Castings Pvt. Ltd. Supplies Mill Rolls for Mixing & Calendaring. Nikhil Roll Castings Pvt. Ltd. Is an ISO 9001 accredited company. Mill Rolls for Mixing & Calendaring with high hardness and wear resistance are manufactured for rubber & plastic, soap & paint, mixing & calendaring industries and as rams for hydraulic cylinders. Mill Rolls for Mixing & Calendaring can be cast hollow with straight bores by the centrifugal cast process to be fitted with steel spindles or complete with shrunk fit spindles. The diameter of the rolls is up to 32 inches or 810 mm and length is up to 72 inches or 1800 mm.