"Sanming KOYO Bearing distributor in China" (Japan IKO bearing a dealer) 
 "Sanming KOYO Bearing distributor in China" (Japan IKO bearing a dealer) 
 The TIMKEN imported bearings of the grinding heat 
 TIMKEN imported bearings of grinding wheel and workpiece contact area, consume a lot of energy to produce large amounts of grinding heat to cause local transient high temperature of the grinding zone. Use of linear movement heat source heat transfer theory formula derivation, the instantaneous temperature in the method of calculation or application of infrared and thermocouple method measured experimental conditions, can be found in the 0.1 ~ 0.001ms, the instantaneous temperature of the grinding zone can be as high as 1000 to 1500 ℃. This instantaneous high temperature, sufficient to enable the work surface to a certain depth of surface layer of high temperature oxidation, amorphous organization, high-temperature tempering and secondary quenching, and even burn a variety of changes such as cracking. 
 (1) the surface oxide layer 
 Instantaneous under high temperature steel surface and the role of oxygen in the air or into a thin (20 ~ 30nm) thin layer of iron oxide. It is noteworthy that the oxide thickness and surface grinding of the metamorphic layer total thickness of the test results showed a corresponding relationship. This shows that the oxide layer thickness and grinding process is directly related to an important symbol of the grinding quality. 
 (2) amorphous tissue layer 
 Instantaneous high temperature of the grinding zone to the surface of the molten state, the molten metal molecular flow is evenly coated on the surface of the work, and the base metal to be cooled extremely rapidly, forming a very thin layer of amorphous tissue layers. It has high hardness and toughness, but it is only about 10nm, it is easy to be removed in precision grinding. 
 "Sanming KOYO Bearing distributor in China" (Japan IKO bearing a dealer) 
 Below to share with you what years of work experience in the detection of local bearing. First NSK Bearings checks should be in the environment in the light environment, the best is the astigmatism, so as to better NSK Bearings external observation, look at the surface and no cracks, etc. Other strange. Such as mechanical cloud-like process of wear and tear, scratches, touch pressure, will result in the offset of the NSK bearing unit, resulting in poor device position, causing the flat overload and stress concentration, shape NSK Bearings precision and reduced service life. 
 NSK bearing maintenance, repair, and exception handling 
 In order to maintain the bearings have been the performance in good condition as long as possible, to be the maintenance, overhaul, in order to accident prevention in the first place, to ensure the reliability of operation, improve productivity and economy. Maintenance best corresponding mechanical operating conditions, operating standards, on a regular basis. Content, monitor operation status, to supplement or replace the lubricant, the inspection of the regular demolition. 
 As maintenance issues in the operation, the bearing of the rotating sound, vibration, temperature, lubricant status and so on. 
 NSK bearing damage and countermeasures 
 "Sanming KOYO Bearing distributor in China" (Japan IKO bearing a dealer) 
 General, if the correct use of bearings can be used to the fatigue life is reached. But there will be an accident prematurely damage, intolerance usage. This early damage and fatigue life, failure or accident is known as quality limits. More due to the installation, the use of lubrication on the pay no attention to the intrusion of foreign bodies from the outside, for the axis, the thermal effect of the shell is not sufficient. 
 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 



 542,075,820,754,207 54207 54 207 - 35 * 30 * 62 * 37.8 * 62 thrust ball bearings 
 54208 582,085,420,854,208 54 208 - 40 * 30 * 68 * 38.6 * 68 thrust ball bearings 
 54209 58209 - 54209 54209 - 45 * 35 * 73 * 39.6 * 73 thrust ball bearings 
 - 54.21 thousand, 54.21 thousand 58.21 thousand 54.21 thousand - 50 * 40 * 78 * 42 * 78 thrust ball bearings 
 542,115,821,154,211 54 211 54211 - 55 * 45 * 90 * 49.6 * 90 thrust ball bearings 
 54 212 58 212 - 54 212 54 212 - 60 * 50 * 95 * 50 * 95 thrust ball bearings 
 54 213 58213 - 54 213 54213 - 65 * 55 * 100 * 50.4 * 100 thrust ball bearings 
 54 214 58 214 - 54214 54 214 - 70 * 55 * 105 * 50.6 * 105 thrust ball bearings 
 58215 54 215 - 54 215 54215 - 75 * 60 * 110 * 49.6 * 110 thrust ball bearings 
 Domestic axis number of imported Bearing size category 
 New models and old models SKF NSK FAG NTN 
 54216 58 216 - 54 216 58216 - 80 * 65 * 115 * 51 * 115 thrust ball bearings 
 54 217 58 217 - 54217 54217 - 85 * 70 * 125 * 59.2 * 125 thrust ball bearings 
 54 218 58218 - 54 218 54 218 - 90 * 75 * 135 * 69 * 135 thrust ball bearings 
 54.22 thousand 58220 - 54 220 54 220 - 100 * 85 * 150 * 72.8 * 150 thrust ball bearings 
 54 222 58 222 - 54 222 54 222 - 110 * 95 * 160 * 71.4 * 160 thrust ball bearings 
 "Sanming KOYO Bearing distributor in China" (Japan IKO bearing a dealer)