I had bought a vertical mill from Shanghai Shibang Machinery half a year ago.
they produce many kinds of grinding mills,like,Raymond Mill, high pressure hanging roller mill, high pressure Powder Mill,etc, and the quality and their service impressed me greatly.

This is the SBM company profile:
Shanghai Shibang Machinery Co., Ltd is a high-technology enterprise of Shanghai city. It is a professional manufacturer of mining crushers and industrial grinding mills, located in beautiful Pudong New District, with factory area of 50,000 square meters. The company features advanced CAD and computer simulation test system, which ensures the quality of design, development, manufacturing and after-sale service.

You can visit www.unisbm.com for your needs ,they have 24'hours online service

http://www.unisbm.com/product
s/lm-vertical-mill.html

Source: http://www.unisbm.com

Ball mill is widely used for milling various kinds of ores or rocks in metal and non-metal mining and building material industry.The main bearing of the ball mill with the shell diameter 900-2100mm is spherical liner bearing; for the shell diameter 2700mm, the main bearing is completely closed self-aligning 120°bearing with strong alloy of high lead and low tin with low hardness, underneath laid with cooling copper piping full of water The bearing is of static pressure structure with high and low pressure united oil lubricating system. To use the Ball Mill, the material to be ground is loaded into the Neoprene barrel that contains grinding media. As the barrel rotates, the material is crushed between the individual pieces of grinding media that mix and crush the product into fine powder over a period of several hours. Obviously, the longer the Ball mill runs, the smaller the powder will be. Ultimate particle size depends entirely on how hard the ground material is, and how long the Ball Mill runs. Our Ball Mills have been being used to grind glass, make ceramic glaze, powder various chemicals, and make Black Powder. Grinding Mill,Raymond Mill
http://www.crusher-mill.com

Source: http://www.theballlmill.com