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FAG bearing clearance is the one ring stationary case, 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 bear the load reduction in the number of move, a single move loads increase, thereby reducing the running accuracy of the bearing, reduced service life clearance is too small, increasing friction, heat generated increases, increased wear, would still get FAG bearing service life expectancy. Therefore, the bearing in the Assembly would have to be strictly controlled and adjusted clearance.
Causes of bearing temperature is too high: lubricating oil quality does not meet the requirements, or degenerate, lubricant viscosity too high body assembled too tight (lack of clearance), FAG bearing too tight; bearing washer on the shaft or housing rotation; overloaded; FAG 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 under conditions of high speed operation and high temperature, should co-ordinate development with special attention to the rotating ring must not be too loose, to prevent vibration of eccentric, as the fixed ring requirements not gaps to prevent fires ring deformation under load and vibration.
FAG bearings to allow a slight sound of running, if the sound is too loud or abnormal noise or impact sound, then the bearing is faulty.
Preload is the FAG bearings at the time of 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 can you improve stiffness and running accuracy of bearing in the State, bear larger loads, bearings with high running accuracy requirements, mostly without clearance even with small amounts of interference of State work, in this case need to preload the bearings in the Assembly. Adjustment of clearance and preload is usually by inner ring external ring for axial displacement of the appropriate method to complete. Technology concepts do not lose out from the above, move through the adjustment of the bearing clearance, bearings and running accuracy of bearing capacity can progress, progress of bearing service life. But will exacerbate friction bearings, fever increased, so adjust the clearance or preload is needed to ensure good lubrication and heat dissipation. If improper adjustment or poor lubrication,, which in turn will exacerbate bearing wear, reduced service life.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 4T-33113 NTN | 65 | 110 | 34 |
| 30319DU NTN | 95 | 200 | 45 |