Four-point contact ball bearings compared with the double outer (inner) double row angular contact ball bearings, high precision rotary bearings of the type matching, accurate positioning, but the complexity of the installation of artificial demanding. The four-point contact ball bearings Deep groove ball bearings species compared with the same radial clearance when the axial clearance is small, and large load capacity, higher speed limit, but less than double the axial load bearing outer (inside) double row angular contact ball bearings. Depending on the installation requires a double-double semi-inner and outer half of two types. Four-point contact ball bearing is a separable bearings, can be said to be a two-way bearings can withstand axial load angular contact ball bearings. Its inner and outer raceway is peach shaped cross-section, when there is no load or pure radial loads, ball and rings rendered as four point contact, which is the origin of the name. Ma Bearing Co., Ltd. is located in Luoyang Luoyang of nine dynasties, is a production and sales of large, extra large, import substitution and non-standard special structure bearing joint-stock enterprises. My company has strong technical force, engineers and technicians accounted for 18% of the number of enterprises, skilled workers have been several rigorous training and technical level assessment, strict work style, technical excellence. Production equipment and testing instruments Ryoma Bearing Co., fully able to meet all types, size, precision grade bearings and special processing requirements, production process according to the enterprise internal control standards stricter than national standards and seized the whole of the product integrated multi-project test manufactured products, the factory can guarantee the quality of each bearing products meet or exceed national standards. Our company regards quality as life, customer is God, in order to meet customer expectations, the striving for national oversize bearing industry leading companies as their goals and rewards caring for customers. Our range of product specifications for the internal diameter of Φ200 ~ Φ4500mm, widely used in machine tools, petrochemical, mining, metallurgical equipment, power generation equipment, heavy machinery, building materials, construction machinery, oil rigs, steel ball processing equipment, defense industry and technology and other cutting-edge equipment product sales covered more than 20 provinces and cities, with domestic customers to establish a good economic and trade relations. Our company has obtained GB/T19001-2000idtISO9001: 2000 "quality certification system *" and bearing export ISO9001: 2000 "Quality System Registration *", bearing products are exported to America, Europe, Australia and Southeast Asian countries. Ma Luoyang Bearing Co., Ltd. Contact: Zhuxing Li