NSK Bearings through the "MOTION & CONTROL" (operation and control) technology, in order to build a comfortable and safe community dedication. While safeguarding the global environment, we should strengthen our solidarity and cooperation among nations, people and people through undertakings in the world.
Japan's Seiko Co., Ltd. (NSKLTD) was established in 1916, Japan is the country's first design and production of bearings manufacturers. For decades, NSK has developed countless new bearings to meet the needs of users all over the world, and has made great contributions to industrial development and technological progress. At the same time NSK relies on its technical advantages in precision machining to continuously develop high, refined and advanced products such as auto parts and precision mechanical components and actively carry out diversified operations in the field of electronic applications.
Gradually establish and perfect the trinity business system with production as the core, technology as guidance and marketing information as an aid. NSK will speed up the localization of this system so as to provide more direct and complete services for the vast number of users in China. China's industrial modernization make its due contribution.
Spherical roller bearings with two rows of rollers, the main radial load , but also can withstand any direction of axialload. High radial load capacity, especially for heavy load or vibration load work, but can not afford pure axial load .This type of bearing outer ring raceway is spherical, so its aligning performance is good, can compensate the coaxialerror.
There are two symmetrical spherical roller, the outer ring has a common spherical raceway, the inner ring has two inclined with the bearing axis of the raceway, with good self-aligning properties, when the shaft bending force or the installation of different heart When the bearing can still be used normally, self-aligning with the bearing size seriesvary, the general allowable self-aligning angle of 1 to 2.5 degrees, the load capacity of this type of bearing larger, in addition to bear the radial load bearing can withstand Two-way axial load, with good impact resistance, in general, spherical roller bearings allow the work of low speed .
Spherical roller bearings according to the roller cross-section shape is divided into symmetrical spherical roller andasymmetric spherical roller two different structures, asymmetric spherical roller bearings are early products, mainly for the mainframe maintenance services, the new design When the host is rarely used symmetrical spherical rollerbearings , the internal structure after a comprehensive improvement in design and parameter optimization , and the earlier production of spherical roller bearings, can withstand greater axial load, the operation of this bearing The temperature is lower, it can adapt to the requirements of higher speed, according to whether the inner wall with or without the use of cage can be divided into C and CA two types, C-type bearings are characterized by the inner wall without ribs and use Steel stamping cage, CA-type Trane bearing the characteristics of both sides of the inner ring and have adopted the carSolid cage In order to improve the lubrication of bearings, to provide users with the outer ring with annular groove and three oil-filled spherical roller bearings, bearing the post code / W33 said, according to user requirements can also be supplied in the band Sphere oil ring spherical roller bearings, in order to facilitate the customer handling and replacement of bearings, but also to provide the bore with a tapered spherical roller bearing taper taper 1:12 after the code-named K, in order to adapt Special user requirements can also provide the inner hole taper of 1:30 bearings, the subsequent code-named K30 bore taper bearing lock nut can be used to install the bearing directly on the tapered journal , but also with the adapter sleeve Or withdrawal sleeve to mount the bearing on the cylindrical journal. In order to ensure that the bearings at high speeds to prevent centrifugal detriment caused by the glide between the raceway and roller, the bearing should withstand a certain minimum radial load size can be estimated as follows:
Fr = 0.02C
Fr - the most Small radial load N
C-Bearing basic dynamic load rating N
Equivalent dynamic load
P = Fr + Y1Fa
P = 0.67Fr + Y2Fa when Fa / Fr e P-equivalent dynamic load in the
formula Fa / Fr e
Y1 Y2- Axial dynamic load coefficient
Equivalent static load
P0 = Fr + Y0Fa
P0- equivalent static load N
Y0- axial static load factor