(Changzhou NTN Bearing sales center) KOYO, bearing distributors 
 (Changzhou NTN Bearing sales center) KOYO, bearing distributors 

 According to the rolling bearing of this size and use practices of alternative bearing is selected, you should follow the following principles: 
 According to the bearing information to identify the original use of the bearing dynamic load rating C values ??and static load rating C0 value, and in accordance with the aforementioned bearing life calculation formula for calculation of the original bearings and prepare the calculation of alternative bearing life and load carrying capacity. Must be pointed out that the service life of bearing and bearing rated dynamic load value of C 3 (ball bearings) or 10/3 (roller bearing) the power of a increasing relationship, but rated dynamic load C value of size is not a measure of bearing life the only criteria, such as alternative bearing dynamic load rating C values ??than the original bearing hours, and other technical characteristics and host maintenance increase in the number should be considered bearing as well as economic costs, or to take appropriate and effective measures from the lubrication point to extend bearing life, in order to meet the alternative rationality. The alternative of bearing per minute allowed the speed limit should be equal to or higher than the actual speed when the wife bearings in machinery and equipment. Because the higher the speed of the bearing, the greater the centrifugal force of the rolling body, not only increases the bearing load, and bear the increased power of the number of units Timeline, easy to make the material fatigue, reduce bearing life, so the alternative bearing speed limit should be selected higher. Alternative bearing size and his first wife bearing size can not change the size of the bearing outer ring with shell holes, or with the bearing inner ring with the size of the journal, to buy the original bearing, you can re-install the wife bearing. 
 (Changzhou NTN Bearing sales center) KOYO, bearing distributors 
 Alternative bearing clearance is consistent with the original bearing clearance. 
 Alternative bearing tolerance level should be equal to or higher than the first wife bearing to prevent the installation of machinery and equipment accuracy affected. 
 Inlayed bearing alternative, to ensure the concentricity of the sets of inner and outer cylinder while, and should be the correct choice of the tolerances in the processing sets. 
 Domestic bearing to replace the imported bearings, first from the original equipment data or the actual equipment of foreign bearing code, manufacturing, manufacturers and technical characteristics of the bearing, then alternative work and pay attention to: According to the original equipment foreign bearings used in the dimensions, specifications, type and manufacturer of the basic code to identify appropriate alternative bearing series and code from the manual at home and abroad bearing model control, and check the size of the installation of bearings, especially the dual column, four-row tapered roller bearings (single) tapered roller bearings, angular contact ball bearings in pairs after assembly, the assembly width (or height) and whether the actual use of the bearing. Learn the technical characteristics of the bearing. Bearing the technical characteristics are generally pre-or post code, said bearing code before and after the representation of the set code and the corresponding technical implications of the bearing factory is not the same, no matter which one bearing factory, due to a bearing only one code, and bearing the basic code to match the front and rear set code can only express a characteristic, thus making a regular basis to find out at home and abroad bearing alternative bearing factory or company name, and then find the relevant information the technical implications of the bearing code pre-and post code to understand the original structure of the bearings or technical characteristics. No data are available, by the experts of the domestic bearing manufacturer to determine the alternative program, or go according to the introduction of the original bearing mapping to determine the bearing of the main technical parameters of new product, and-on trial and abroad bearing performance contrast to the progressive realization of the alternative. Bearing selection and substitution is a very detailed technical work, should try to do a combination of bearing users and manufacturers of bearing design, particularly in the selection and development of the new structure of the bearings and with the domestic bearing to replace major equipment abroad bearing and even more so. 
 (Changzhou NTN Bearing sales center) KOYO, bearing distributors 

 Tianjin imported bearings Sales Co., Ltd. for many years to: SKF import bearing, NSK bearing NTN imported bearings, NACHI imported bearings, KOYO, imported bearings of FAG import bearing, INA imported bearings, TIMKEN imported bearings and other well-known imported bearings sales. 
 The products involved: deep groove ball bearings, cylindrical roller bearings, tapered roller bearings, aligning ball bearings, spherical roller bearings, needle roller bearings, angular contact ball bearings, thrust ball bearings, thrust roller bearings, bearing joints, spherical bearings, linear guide series. 
 Applicable industries: iron and steel metallurgy, port machinery, petrochemical, automobile manufacturing, machine tools and paper industry. 
 Sales all over Guangdong, Guangzhou, Dongguan, Foshan, Chengdu, Shenzhen, Zhongshan, Zhuhai, Wuhan, Shenyang, Taiyuan, Urumqi across the country. 
 Relying on the coastal geographical advantage of Tianjin Port, with the price advantage and quality advantage of the company's products, has developed into a considerable scale bearing trade company. Has its own bonded warehouse in Tianjin Port also won the trust of our customers and support. 
 Tel) 86-022-87887680 (Gujing Li) 
 QQ 1945759772 
 Web site: http://www.sjrxzc.com 


 NSK 45TAC75BDBC10PN7A NSK 45TAC100BDBC10PN7A NSK 50TAC100BDBC10PN7A NSK 55TAC100BDBC10PN7A 
 NSK 55TAC120BDBC10PN7A NSK 60TAC120BDBC10PN7A 
 NTN BST17 * 47-1BP4 NTN BST20 * 47-1BP4 
 NTN BST25 * 62-1BP4 NTN BST30 * 62-1BP4 
 NTN BST35 * 72-1BP4 NTN BST40 * 72-1BP4 NTN BST40 * 90-1BP4 NTN BST45 * 75-1BP4 NTN 
 BST45 * 100-1BP4 NTN BST50 * 100-1BP4 
 * 100-1BP4 NTN BST55 * 120-1BP4 NTN BST60 * 120-1BP4 Note: NSK ** the TAC ** B = NTN of BST ** X **-1B NACHI NTN BST55 precision spindle bearings 
 Supply NACHI machine tool spindle bearings, the accuracy of P5 (D) and P4 (C), P2, (B), the sales agent FAG precision machine tool spindle bearings. 
 INA machine tool bearings, NSK precision machine tool spindle bearings, welcome customers to call to discuss the order. Specific model: NACHI 57208CYDB/GLP4, 
 NACHI 57208CYDB/GLP5, NACHI 57208CYDU/GLP4, NACHI 57208CYP4, NACHI 57208CYP5, NACHI 525TAB06U/高标准4, 
 The NACHI 535TAB07U/高标准4 30TAD ball screw support bearings: 30TAB06 15TAB04 1TAB04 20TAB04 25TAB06 35TAB07 40TAB07 40TAB09 
 45TAB07 45TAB10 50TAB10 55TAB10 55TAB12 60TAB12 NACHI Model Example NACHI 7208CYDB/GL P4 NACHI 7208CYDB/GL by 
 P5 NACHI 7208CYDU/GL P4 NACHI 7208CYP4 NACHI 7208CYP5 NACHI 25TAB06U/GM P4 = NSK 25TAC72BSU 
 NACHI 35TAB07U/GM P4 = NSK 35TAC72BSU DKLFA2080-2RS 
 DKLFA2590-2RS 
 DKLFA30100-2RS 
 DKLFA30110-2RS 
 DKLFA40115-2RS 
 DKLFA40140-2RS 

 (Changzhou NTN Bearing sales center) KOYO, bearing distributors