Sag Mills

Generally used as a primary or first-stage grinding solution, sag mills are essentially autogenous mills that utilize grinding balls to aid in grinding much like a ball mill. Sag mills are primarily used in the gold, copper and platinum industries with applications in the lead, zinc, silver, nickel and aluminum industries. Characterized by large diameters and short lengths and the inside of the mill is lined with lifting plates to lift the material inside up and around the inside of the mill, where it then falls off the plates into the rest of the ore. At AM King we feature a great selection of high quality sag mills from top brand name manufacturers including Metso, Hardinge, Marcy and Allis-Chalmers.


Using small iron and steel balls sag mills help grind down mining ore during the primary stages of grinding. Unlike ball mills that are secondary stage grinders that turn already ground materials into a fine powder, sag mills are primary grinders that take large mineral ore and crush it down to a size that can then be fed through a ball mill if necessary. Sag mills feature rotating/tumbling mills in which size reduction takes place without grinding aids. Instead, sag mills use lumps or ore as the grinding media. If the ore is not enough, small steel or metal balls can be added to assist in size reduction.


Combining impact, attrition and abrasion forces, sag mills can usually achieve the same size reduction work that normally takes multiple stages of crushing. At AM King we carry a great selection of high quality new and used sag mills to aid your mining, digging or excavating operation. Sag mills are often used in the grinding process for gold, platinum and copper.


Browse our stock of new and used SAG mills here.