In 1797, the British record Maudslay made by screw drive turret lathe, to achieve motorized feeding and turning thread, this is a major change in the structure of the machine. Maudslay has been called "the father of the British machine tool industry." 19th century, due to promote textile, power, transportation machinery and arms production of various types of machine bed CNC machine tools have appeared. In 1817, the British created the goal planer Roberts; 1818 American Whitney (his full name is Eli Whitney) made of horizontal milling machine; in 1876, the United States made universal cylindrical grinder; 1835 and 1897 years and has invented hobbing and slotting machine. Grinding mankind since ancient times is an ancient technique known adjustable CNC drilling, Paleolithic, polished stone is used this technique. Later, with the use of CNC metal adjustable drilling equipment supply, to promote the development of grinding technology. However, the design of a truly modern grinding machine or thing, even in the early 19th century, it is still a natural by rotating grindstone, make contact with objects grinding process. The first grinder (1864) in 1864, the United States made the world's first grinder, which is a device in the lathe turret installed on the wheel apron, and it has automatic transmission. After 12 years, the United States, Brown invented the modern grinders near universal grinder. Artificial grindstone - Wheel of birth (1892) artificial grindstone demand will rise. How to develop a more wear-resistant than natural grindstone millstone it? In 1892, Americans Acheson silicon carbide CNC successful trial with coke and sand made adjustable drilling companies, which is now known as an artificial grindstone C abrasive; two years later, with aluminum as the main ingredient A successful trial of abrasive again, this adjustable CNC drilling products, grinding it has been more widely used. Later, due to the bearings, to further improve the rail portion of the increasingly high precision grinding machine, and the development of the professional direction, there has been internal grinder, surface grinder, roll grinders, gear grinders, universal grinders and so on. CNC drilling adjustable price, CNC adjustable drilling, Chen Hua machinery provided by China Machinery Co., Ltd. Qingdao Chen. Qingdao Hua Chen Machinery Co., Ltd. (www.qdchenhua.com) strong, credible, in Qingdao, Shandong CNC machine tool industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Chen Hua machinery and you hand into the brilliant, for a better future!