Used Milling Machines Vertical Horizontal CNC machines. Large scale milling machines are generally designed in a modular fashion but for any size of mill the milling head is the key component It can machine the workpiece on three sides simultaneously In conventional milling machines the milling head holds a vertical or horizontal main spindle and a retractable tailstock In a universal milling LB designs and manufactures primary and secondary milling systems to process many materials in different industrial sectors. The LB production lines dedicated to milling are used particularly when processing sand, calcium carbonate, clay and other raw materials with different hardness or abrasion levels, or to reuse industrial waste or to grind inert materials. Lime production line. limestone, clay, iron ore, coal,etc. Limestone is the largest amount of raw materials in cement production. After mining, the size of limestone is large with high hardness, so the limestone crushing plays a more important role in cement plant.