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introduction：Bearing steel is mainly used to manufacture rolling parts and rings of rolling bearings。Because the bearing should have a long life、High precision、Low calorific value、High speed、High rigidity、Low noise、High wear resistance and other properties,Therefore, bearing steel should be required：High hardness、Uniform hardness、High elastic limit、High contact fatigue strength、Necessary toughness、Certain hardenability、Corrosion resistance of atmospheric lubricants。In order to achieve the above performance requirements，Uniformity of chemical composition of bearing steel、Content and type of non-metallic inclusions、Carbide size and distribution、Strict requirements such as decarbonization。Bearing steel is generally of high quality、High performance and multi-variety direction development。Bearing steel according to the characteristics and application environment is divided into：High carbon chromium bearing steel、Carburized bearing steel、High temperature bearing steel、Stainless bearing steel and special bearing materials。
2017-06-01 Reading quantity 329
introduction：A lot of high-speed rotating mechanisms，For full lubrication and reduced friction use several sliders in a circle，For example, some high-speed grinding machine grinding head spindle。People also call it split bearing。Large diameter operating systems also use split bearings，Maybe not a slider，Its a number of rollers。 ...
2017-05-31 Reading quantity 217
introduction：1、Quasi-constant velocity universal joint and constant velocity universal thrust ball bearing joint： The common quasi-constant velocity universal joint has two kinds of double coupling and three pin shaft，Their working principle is the same as the principle of double cross shaft universal joint to achieve constant speed transmission。 The double universal joint is actually a set of double ten bearing type universal joint constant speed transmission device which reduces the length of the drive shaft to the minimum，The double fork is equivalent to the transmission shaft and the universal joint fork with both ends in the same plane。When the Angle of intersection between the output shaft and the input type query shaft is small，It makes the two axial angular velocities nearly equal，The intersection of the two axes on the arc is very close to the above middle vertical line，makeαSelf-aligning roller bearings1withα2 The difference is small，Therefore, it is called the double universal joint quasi-constant velocity un
2017-05-31 Reading quantity 299
introduction：In the grinding of linear bearings，Grinding wheel and workpiece contact zone，Consuming a lot of energy，Generate a lot of grinding heat，Resulting in local transient high temperature in the grinding zone。The theoretical formula of heat transfer from linear moving heat source is used、The instantaneous temperature under experimental conditions is calculated or measured by infrared and thermocouple methods
2017-05-31 Reading quantity 222
introduction：4Class bearings are also called needle roller bearings，Relative to its diameter，The roller is thin and long。This roller is called a needle roller。Despite having a smaller cross-section，The bearing still has a high load bearing capacity，Needle roller bearings are fitted with long thin rollers（Roller diameterD≤5mm，L/D≥2.5，LIs the length of the roller），Thus the radial structure is compact，Its inner diameter and load capacity are the same as other types of bearings，Minimum outside diameter，Especially suitable for support structures with limited radial mounting size。 4Class bearing capacity is large，Suitable for support structures with limited installation size，The journal surface is hardened as a rolling surface，The bearing is fitted into the seat hole with a press fit，No more axial positioning is required。Bearings should be injected with appropriate grease before installation，Under normal circumstances，No more lubrication after assembly BKType B bearings are used in bearings without an extended end of the
2017-05-31 Reading quantity 216
introduction：Linear bearing packaging characteristics are as follows：1)Work circulation links are complex 2)Various packaging forms3)The performance requirements of packaging are high
2017-05-31 Reading quantity 210
introduction：What are the causes of bearing damage？Rolling bearing disassembly inspection，The failure and damage cause of the bearing can be judged according to the damage condition of the high-precision turntable bearing。
2017-05-31 Reading quantity 293
introduction：Hub bearing（hub bearing）The main role is to load and provide accurate guidance for the rotation of the wheel hub，It bears both axial and radial loads，Its a very important component。Traditional automobile wheel bearings are composed of two sets of tapered roller bearings or ball bearings，Bearing installation、Apply Oil、Sealing and clearance adjustment are carried out on the automotive production line。This structure makes it difficult to assemble in automobile production plants、High cost、Poor reliability，And when the car is being serviced at the repair station，Bearings also need to be cleaned、Oiling and adjusting。Hub bearing units are developed on the basis of standard angular contact ball bearings and tapered roller bearings，It combines two sets of bearings as one，It has good assembly performance、Clearance adjustment can be omitted、Light weight、Compact structure、Large load capacity、The bearing can be pre-loaded with grease for sealing、Omit the advantages of external hub seal and free from maintenance，It has bee
2017-05-28 Reading quantity 321
introduction：NSKSince the1916Since the beginning of bearing production in Japan，As Japans bearing pioneer，Develop and provide all kinds of bearings，It has made great contributions to the development of the industry and the progress of technology。withNSKGlobal expansion，More and more industries and enterprises use itNSKbearing：Construction machinery、Machine tool、CARS、metallurgy、mine、petroleum、machine、electricity、Railway and other industries。NSKIn the bearing field，Ranked first in Japan，Its also one of the best in the world。In addition，NSKIt also uses the precision machining technology produced by the production of bearings，From a very long time ago by the introduction of auto parts、Precision machinery products、The entry of electronic application products and other fields，Promote multi-dimensional business expansion。from20century60 The beginning of the decade，Actively explore overseas markets。So far，NSKThe group is established in more than 20 countries and regions around the world63works（Japan22a、China12a），14Technical cente
2017-05-28 Reading quantity 224
introduction：Needle roller bearing(needle bearing)A roller bearing with a cylindrical roller，Relative to its diameter，The roller is thin and long。This roller is called a needle roller。Despite having a smaller cross-section，The bearing still has a high load bearing capacity，Needle roller bearings are fitted with long thin rollers（Roller diameterD≤5mm，L/D≥2.5，LIs the length of the roller），Thus the radial structure is compact，Its inner diameter and load capacity are the same as other types of bearings，Minimum outside diameter，Especially suitable for support structures with limited radial mounting size。 Depending on the occasion，Bearings without inner rings or needle roller and cage assemblies are available，At this time, the journal surface matched with the bearing and the surface of the housing hole are directly used as the inside of the bearing、Outer rolling surface，In order to ensure that the load capacity and operating performance are the same as that of the ring bearing，The hardness of the shaft or housing hole r
2017-05-28 Reading quantity 341
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