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Judgment disassembled KOYO bearings possibility of further use, angular contact ball bearings in after cleaning inspection, carefully check the raceway, the raceway, with the surface state, cage wear, bearing clearance is increased and whether the impact of dimensional accuracy decrease the damage, abnormal. Non-separable type of small ball bearings, etc., then the inner flat end with one hand, rotate the outer ring to confirm whether smoothly.
Bearings and other separable bearings, rolling elements can be, the outer ring raceway were examined.
Large bearings rotated by hand because they can not pay attention to check the rolling body raceway, cage, ribs noodles appearance, bearing the higher the importance of checks need to be cautious.
Determine the bearing can be used again, according to the extent of bearing damage, mechanical properties, importance, operating conditions, inspection intervals, and other related factors to decide. But check if found to have the following defects, the angular contact ball bearings can not continue to use the new KOYO bearings need to be replaced.
1, the viscosity lubrication conditions between the rolling contact surfaces of the two surfaces are separated by a sufficient lubricating film lubricant at normal operating temperature must maintain a certain minimum viscosity to reduce friction and high bearing life KOYO bearings The main factors that affect the average bearing diameter and working speed impact. working viscosity lubricant viscosity at operating temperature by the working temperature 4 ℃ when called by viscosity-temperature curve to determine the viscosity and viscosity ratio is an indicator represents film forming ability with its speed and other factors have on bearing life great impact running deteriorate (temperature rise speed to reduce pollutants increase) bearing life may reduce the rate of large sewage.
2, the bearing life calculation of correction factor correction factor influencing factors and calculation methods. Analysis of influence of the various correction factors calculated bearing life due to a fundamental factor of the bearing lubrication conditions get better viscosity ratio should be greater than or equal, but they can not be too large otherwise it may cause an increase in viscosity of angular contact ball bearing operating temperature when the additive should be used with extreme pressure lubricant addition move will change the surface pressure between the symbolic significance of lubricating oil viscosity calculation methods are considered operating conditions ( Operating temperature fast charge reprinted Size lubrication conditions on bearing life.
Rolling make precision parts, which when used appropriately cautious requires both changed using a high-performance KOYO bearings, if used improperly, they can not achieve the expected performance results, therefore, to make use of the bearing should note the following:
Keeping the bearing and its surroundings clean. Smile even invisible dust from entering the bearings, angular contact ball bearings will increase wear, vibration and noise.
When using the installation carefully, do not allow a strong punch, does not allow a direct hit with a hammer bearing, not pass through the rolling pressure.
Use appropriate and accurate installation tools, make use of special tools, try to avoid using fabric and staple fibers and the like.
Prevent corrosion of bearings, bearing direct hand pick, to fully wash hands sweat, and coated with high-quality mineral oil before, during the rainy season and summer with particular attention to rust.
With choice
Bearing inner diameter and outer diameter tolerances are manufactured according to the standard, KOYO bearing inner ring and the shaft, the outer ring and housing bore with the tightness of the journal can only be controlled housing bore tolerances and tolerances to be achieved. Bearing inner ring and the shaft hole basis with the use of the bearing outer ring and housing bore with the introduction of machine axis system.
With the correct choice, angular contact ball bearings have to know the actual load condition, temperature and other requirements, and in fact it is very difficult. Therefore, in most cases is selected according refinements fit.
Load size
Between the ring and the shaft or housing over the load depends on the size of the win, the heavier the load using a larger amount over win, the lighter the load using a smaller amount over win.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 4T-1775/1729 NTN | 19.05 | 56.896 | 19.837 |
| 4T-1380/1328 NTN | 22.225 | 52.388 | 20.168 |