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NSK bearings demonstrate advanced features to a serious failure (usually for NSK bearing damage as sticking, burning, sand spallation, Raceway, wear beads and other) most of the time not more than a week, device capacity, the greater, faster speed, press bearing into bearing back rotational flexibility of a block. If there is clearly turning the inflexible, it indicates that the axis dimensions are too large, tolerance to go down. If bearings are pressed into the shaft turn by hand after apparent "Salsa", the tolerances of the shaft may be too large or the roundness of the axis bad. So when the control shaft and housing tolerances need to control the roundness.
Because NSK bearings are high-precision products, such as improper Assembly can easily cause damage to the bearing Raceway, cause damage to the bearings. During Assembly of the bearing should be dedicated mold, able to beat, only small forces when pressed into the shaft, pressure ring only ring stress. Requirements when using pneumatic or hydraulic Assembly, at the time of pressing the touch outside to level up or down status, such as tilt will cause damage to the bearing Raceway due to stress and the bearing rings.
Rust is characterized by many paint on the sealed-type motor, motor Assembly, sounds very good, but after some time in the warehouse, the electrical noise gets so large, remove the bearing with serious rust. Many manufacturers are considered to be before bearing problems, now motor plant has been realized mainly insulating paint issue, the issue mainly because the acidity of insulating varnishes containing volatile substances formed under certain temperature, humidity, corrosive substances, which cause corrosion of bearing Raceway NSK bearing damage.
Sometimes NSK bearing surface Zhijian will squeeze into foreign hard particle or hard mass foreign body or metal surface of mill chip, this will is bearing caused plow Groove shaped of scrapes, these hard foreign body through lubrication media into bearing internal, as bearing of constantly running, local friction health hot, easy caused friction surface local deformation and friction micro welding collection phenomenon, even may appeared local melting of situation, last caused occlusal phenomenon.
Bearing overload of breaking cause of defects and two major factors, caused when the applied load exceeds the ultimate strength of the material parts break called overload fracture, NSK bearings overheating can also occur during the running of the Organization and the local burns and other defects, defects caused by the break.
Bearing type is typically based on the conditions of use of the products and selections for NSK bearing load. It is important to understand the user's actual workload is compatible with the selected bearing, if the bearing does not meet the requirements, election model as soon as possible, but unless a special product in select models are generally not a problem. Grease is generally chosen based on speed, temperature, NSK bearings noise requirements and starting torque of select requirements for various oil performance very well.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 4T-30309D NTN | 45 | 100 | 25 |
| 4T-30309 NTN | 45 | 100 | 25 |