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NSK bearing scrolls. Measuring sound on sound of rolling bearings in operation size, and sound checks, bearings, even with minor injuries such as split, also is making an abnormal sound and irregular sound, using the acoustic measurement can tell. Bearings bearing temperature, General bearing outside of room temperature can be speculated that, if the uses of oil hole can directly measure the bearing outer ring temperature, is more appropriate. Usually, temperature of the bearings as the run began to rise slowly, 1-2 hours later to reach a steady state. The normal temperature of the bearing due to the heat capacity of the machine, heat dissipation, speed and load to another. If lubricated, install appropriate, bearing temperature quick rise, abnormal high temperature occurs, in which case you must stop, take the necessary preventive measures.
Poor lubrication is one of the major causes of premature damage of NSK bearings. Major causes include: no lubrication or lubricant in a timely manner; lubricant or lubricant does not raise in place; selection of lubricants or lubricant improper; incorrect lubrication method, and so on. Recommendation: choose the right lubricant or lubricant, using correct notation of lubrication method.
Rolling road sound source is due to ring the inherent vibration after the load. Due to the rings and rolling elements of nonlinear vibration of elastic contact form system. When lubricating or when machining accuracy is not high stimulation and the inherent vibration of elastic features, passing into the air becomes noise. It is well known that even the most skilled manufacturing uses contemporary technology NSK bearing parts, its surface will always exist with varying degrees of tiny geometric errors, so that between the raceways and rolling elements produce micro-wave excited vibration inherent vibration.
NSK bearing of configuration bearing of configuration on bearing rigid of effects also is large, generally, for centripetal thrust type of ball bearing and roll child bearing, in into on using times take outer ring big end surface relative (that its pressure line by constitute of pressure cone Tsim to outside) of configuration, such configuration NSK bearing anti-subversion torque of capacity large, in temperature changes Shi its adjustable was of pre-tight volume also less occurs changes.
Viscosity is an important lubricant characteristics, size of the viscosity of lube is directly between fluidity and friction surface forming of oil film thickness, viscosity of lubricant in the bearing operating temperature is typically 12-15cst. Higher speed should be selected lower viscosity, the more heavily loaded should be selected high viscosity. Commonly used lubricant oil, high speed machinery oil, oil, compressor oil, transformer oil, cylinder of steam turbine oil.
NSK bearing on the structure of each ring has a cross section in the order of the Equatorial circumference of the ball one-third continuous Groove Raceway. NSK bearings are used primarily to withstand radial load, can accommodate some axial loads. When the radial clearance of bearings increases, has the nature of angular contact ball bearings, which can bear the alternating axial loads in both directions. Compared with other types of bearing of the same size, the friction coefficient of bearings of small, extreme high speed, high precision, is preferred by the user selection of bearing type. NSK bearing structure is simple, easy to use, is the production of bulk's largest, the most widely used class of NSK bearings.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| NJ2209ET NSK | 45 | 45 | 23 |
| NJ2208ET NSK | 40 | 40 | 23 |