- Hello Customer - Log in or Register!
Bearing clearance is in the case of one ring fixed, another along the radial or axial rings made by the maximum amount of flow, clearance is divided into radial clearance and axial clearance in two ways. Move needle bearing Assembly, clearance must not be too large or too small. Clearance is too large, causing at the same time the move of the reduction in the number of loading and increased the load of a single move, thereby reducing the INA bearings rotation precision, reduced service life clearance is too small to pose increased friction and heat generated increases wear, reduction in bearing service life also. Therefore, during Assembly of the bearing is to be strictly controlled, and when adjusted clearance.
INA bearing high temperature cause: lubricating oil quality does not meet the requirements, or degenerate, lubricant viscosity too high body assembled too tight (lack of clearance), bearing too tight; bearing washer on the shaft or housing rotation; overloaded; bearing cage or rolling of fragmentation.
1), roundness of the shaft and housing bore and shoulders required to follow the appropriate precision bearings to the vertical.
2), combined with the degree of interference for accurate calculation of rotating rings, to precise calculation of the appropriate fixing rings match. Rotating ring of burning the degree of interference where possible should be made smaller. As long as the guaranteed operating temperature thermal expansion effects, as well as maximum speed under the influence of centrifugal force, does not lead to creeping or sliding of a compact surface. Fixed rings based on load size and bearing size, select Min clearance fit interference fit, too loose or too tight is not conducive to precise shapes.
3), needle roller bearings in high speed running under the conditions, and higher working temperature, should pay particular attention to coordination rotating rings must not be too loose, to prevent vibration of eccentric and fixed rings meet the not gaps to prevent vibration of ring distortion under load and fire.
INA bearing allows at work has a slight running sound, if the noise is too large or unusual noise or impact sound, then the bearing is faulty.
Preload is the bearing in the Assembly, to the inner or outer rings of an axial force to eliminate needle bearing clearance, and move the body deformation in early contact with the inner and outer rings. Preload progressive stiffness and running accuracy of bearing in the State, as loading a large, rotating bearing with high accuracy requirements, mostly without clearance work there is even a small amount of interference, this case will need to be at the time of Assembly to preload the bearings. Adjustment of the clearance and preload is usually through the appropriate inner ring external ring axial displacement method to complete. From the above technology concepts without losing face, to move through the adjustment of the bearing clearance, INA bearings and running accuracy of bearing capacity can progress, progress the service life of the bearing. But at the same time to increase the bearing friction, fever increased, so adjust the clearance or preload is necessary to ensure good lubrication and heat dissipation. If inappropriate or poor lubrication adjustment, it will, in turn, exacerbate bearing wear, reduced life expectancy.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 4T-3382/3339 NTN | 39.688 | 80.035 | 30.391 |
| 4T-26880/26822 NTN | 39.688 | 79.375 | 25.4 |