Precious Fabcast Pvt. Ltd. Manufactures Ball Mill for Continuous Grinding Operations. Precious Fabcast Pvt. Ltd. Is an ISO 9001: 2000 certified company. This machine is used to feed from one end and to collect the discharge in a cyclone from other end with the help of a fan. The classifier may be of mechanical type or for a very precise and fine separation variable speed motor driven classifier is also available. Available in different models, with their respective shell size, the production capacity and H.P. Depends on the physical properties and particle size of the material.